Pub Date : 2021-03-01DOI: 10.29393/chjaas37-24egra50024
R. Macedo, Victalina Arredondo, A. Jiménez, C. Haubi, A. Herrera
The aim of this study was to describe the early growth of Pelibuey lambs raised under an intensive production system in Colima, Mexico, using non-linear models. Weight data were collected from 433 lambs every 30 days from birth to 180 days of age, and growth curves were estimated using non-linear and linear models. According to goodness of fit criteria, the Linear, Gompertz, Logistic and Von Bertalanffy models are suitable and show a reasonable fit for describing Pelibuey lamb’s growth, the Brody and Richards curves did not meet the convergence criterion. The parameter A denotes asymptotic weight; weight was higher in multiple born males and quadruplet born females in the Von Bertalanffy and Gompertz models, while it was also higher in males in the Logistic model. The parameter k represents maturation rate and indicates the growth speed in reaching asymptotic weight, being higher in single and twin females, and single males in all the non-linear models. From birth up to 90 days of age (weaning), weight of single lambs becomes greater than that of multiple born lambs, but from 90 days of age, weight of multiple born lambs tends to equal that of singles, which happens at 180 days of age. The early growth of Pelibuey lambs can be described with similar precision using linear and non-linear models.
{"title":"EARLY GROWTH MODEL OF PELIBUEY LAMBS RAISED UNDER AN INTENSIVE PRODUCTION SYSTEM IN COLIMA, MEXICO","authors":"R. Macedo, Victalina Arredondo, A. Jiménez, C. Haubi, A. Herrera","doi":"10.29393/chjaas37-24egra50024","DOIUrl":"https://doi.org/10.29393/chjaas37-24egra50024","url":null,"abstract":"The aim of this study was to describe the early growth of Pelibuey lambs raised under an intensive production system in Colima, Mexico, using non-linear models. Weight data were collected from 433 lambs every 30 days from birth to 180 days of age, and growth curves were estimated using non-linear and linear models. According to goodness of fit criteria, the Linear, Gompertz, Logistic and Von Bertalanffy models are suitable and show a reasonable fit for describing Pelibuey lamb’s growth, the Brody and Richards curves did not meet the convergence criterion. The parameter A denotes asymptotic weight; weight was higher in multiple born males and quadruplet born females in the Von Bertalanffy and Gompertz models, while it was also higher in males in the Logistic model. The parameter k represents maturation rate and indicates the growth speed in reaching asymptotic weight, being higher in single and twin females, and single males in all the non-linear models. From birth up to 90 days of age (weaning), weight of single lambs becomes greater than that of multiple born lambs, but from 90 days of age, weight of multiple born lambs tends to equal that of singles, which happens at 180 days of age. The early growth of Pelibuey lambs can be described with similar precision using linear and non-linear models.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43882137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.29393/CHJAAS37-6AAWG30006
Willmer Guevara, Carmen Hidalgo-Alcázar, J. L. Rojas
{"title":"ANÁLISIS DE LA AGROINDUSTRIA CHILENA DEL AGUACATE (PALTA) EN EL MERCADO INTERNACIONAL","authors":"Willmer Guevara, Carmen Hidalgo-Alcázar, J. L. Rojas","doi":"10.29393/CHJAAS37-6AAWG30006","DOIUrl":"https://doi.org/10.29393/CHJAAS37-6AAWG30006","url":null,"abstract":"","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44774302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.29393/chjaas37-26cbml50026
M. Castrillo, G. Bich, Gastón Sioli, P. Zapata, L. Villalba
Phytopathogenic fungi attack many agricultural crops such as yerba mate (Ilex paraguariensis Saint Hil.). An innovative alternative for pest control is the use of biocontrol fungi of Trichoderma genus. The objectives of the present work were to isolate the fungal agents that cause foliar lesions in yerba mate, and to evaluate the antagonistic capacity of native Trichoderma sp. isolates against pathogens in this crop. From diseased plant-tissues, a phytopathogenic fungus belonging to Alternaria alternata species was isolated and identified morphologically and molecularly. Pathogenicity assays were done on yerba mate plants in triplicate. Superficial mechanical lesions were made on them and the phytopathogenic isolation obtained (conidia and mycelium) was inoculated to evaluate their phytopathogenic capacity. New dual culture methods were determined to evaluate in vitro antagonism of Trichoderma. The in vitro biocontrol capacity of 30 Trichoderma isolates was evaluated against the phytopathogenic isolation obtained. As a positive control, a strain isolated from a commercial fungicide product based on T. harzianum was used. It was determined that 18 of the 30 isolates of Trichoderma inhibited the growth of the phytopathogen A. alternata by more than 50%, and presented statistically significant differences with respect to the positive control. These results confirm the effectiveness of using native biocontrol isolates adapted to the climatic and soil conditions where the phytopathogenic microorganisms are found.
{"title":"CAPACIDAD BIOCONTROLADORA DE AISLAMIENTOS NATIVOS DE Trichoderma sp. CONTRA EL HONGO FITOPATÓGENO Alternaria alternata, AISLADO DE YERBA MATE (Ilex paraguariensis Saint Hil.)","authors":"M. Castrillo, G. Bich, Gastón Sioli, P. Zapata, L. Villalba","doi":"10.29393/chjaas37-26cbml50026","DOIUrl":"https://doi.org/10.29393/chjaas37-26cbml50026","url":null,"abstract":"Phytopathogenic fungi attack many agricultural crops such as yerba mate (Ilex paraguariensis Saint Hil.). An innovative alternative for pest control is the use of biocontrol fungi of Trichoderma genus. The objectives of the present work were to isolate the fungal agents that cause foliar lesions in yerba mate, and to evaluate the antagonistic capacity of native Trichoderma sp. isolates against pathogens in this crop. From diseased plant-tissues, a phytopathogenic fungus belonging to Alternaria alternata species was isolated and identified morphologically and molecularly. Pathogenicity assays were done on yerba mate plants in triplicate. Superficial mechanical lesions were made on them and the phytopathogenic isolation obtained (conidia and mycelium) was inoculated to evaluate their phytopathogenic capacity. New dual culture methods were determined to evaluate in vitro antagonism of Trichoderma. The in vitro biocontrol capacity of 30 Trichoderma isolates was evaluated against the phytopathogenic isolation obtained. As a positive control, a strain isolated from a commercial fungicide product based on T. harzianum was used. It was determined that 18 of the 30 isolates of Trichoderma inhibited the growth of the phytopathogen A. alternata by more than 50%, and presented statistically significant differences with respect to the positive control. These results confirm the effectiveness of using native biocontrol isolates adapted to the climatic and soil conditions where the phytopathogenic microorganisms are found.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43047233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-01DOI: 10.29393/chjaas36-10el30010
Leticia Tombion, A. Kato, M. S. Soto
Calibrachoa, which belongs of the Solanaceae family, is a genus native to South America. Some commercial varieties of this plant have a high impact on the ornamental plant market because of the color and attractive shape of their flowers as well as their adaptability to be grown in flower beds and flower pots. The objective of this work was to develop an efficient protocol for in vitro propagation of Calibrachoa var. Pampa Salmon INTA from apical meristems. The combination of MS 1⁄2 and 0.01 mg L-1 BAP resulted in a high percentage of regeneration of plants in addition to a greater aerial (shoot) and radical (root) production that, consequently, allowed for a high rate of plant survival after transfer to the greenhouse.
菖蒲属，属茄科，原产于南美洲。这种植物的一些商业品种由于其花朵的颜色和迷人的形状以及它们对花坛和花盆的适应性而对观赏植物市场产生了很大的影响。本研究旨在建立一种有效的潘帕鲑鱼(Calibrachoa var. Pampa Salmon)根尖分生组织离体繁殖方法。MS 1 / 2和0.01 mg L-1 BAP的组合除了产生更多的气生(茎)和根茎(根)外，还产生了很高的植株再生率，因此，允许植物在转移到温室后的高成活率。
{"title":"PROTOCOLO DE REGENERACIÓN DE Calibrachoa var. PAMPA SALMÓN INTA A PARTIR DE MERISTEMAS APICALES","authors":"Leticia Tombion, A. Kato, M. S. Soto","doi":"10.29393/chjaas36-10el30010","DOIUrl":"https://doi.org/10.29393/chjaas36-10el30010","url":null,"abstract":"Calibrachoa, which belongs of the Solanaceae family, is a genus native to South America. Some commercial varieties of this plant have a high impact on the ornamental plant market because of the color and attractive shape of their flowers as well as their adaptability to be grown in flower beds and flower pots. The objective of this work was to develop an efficient protocol for in vitro propagation of Calibrachoa var. Pampa Salmon INTA from apical meristems. The combination of MS 1⁄2 and 0.01 mg L-1 BAP resulted in a high percentage of regeneration of plants in addition to a greater aerial (shoot) and radical (root) production that, consequently, allowed for a high rate of plant survival after transfer to the greenhouse.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44858130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-01DOI: 10.29393/CHJAAS36-12ICCQ40012
Celerino Quezada, M. Sandoval, C. Ovalle, V. Pérez
The use of cover crops in non-irrigated (rainfed) vineyards is a sustainable alternative in shallow hillside and low water retention soils. A study was conducted in the Mediterranean zone of centralsouthern Chile in order to evaluate the effect of different types of inter-row cover crops on soil water content and yield in a non-irrigated vineyard Vitis vinifera L. ‘Cabernet Sauvignon’. The experiment was carried out using a randomized complete block design with five treatments and four replicates. The treatments consisted of different mixtures of grass and legume species and a control treatment (without vegetation cover). Soil volumetric water content, soil water availability, grape yield and vine vigor were evaluated. The results obtained showed that the cover crops evaluated did not affect soil water availability, grape yield or vine vigor. The mixture with the best performance was tall fescue, subterranean clover and balansa clover.
在非灌溉(雨养)葡萄园中使用覆盖作物是浅山坡和低保水土壤的可持续选择。在智利中南部的地中海地区进行了一项研究，以评估不同类型的行间覆盖作物对无灌溉葡萄园葡萄树(Vitis vinifera L. ' Cabernet Sauvignon ')土壤含水量和产量的影响。试验采用随机完全区组设计，5个处理，4个重复。这些处理包括不同的禾草和豆科植物混合处理和一个对照处理(没有植被覆盖)。对土壤体积含水量、土壤水分有效性、葡萄产量和葡萄活力进行了评价。结果表明，所评价的覆盖作物对土壤水分有效性、葡萄产量和藤蔓活力没有影响。以高羊茅、地下三叶草和三叶草的混配效果最好。
{"title":"INFLUENCIA DE CUBIERTAS VEGETALES EN LA DISPONIBILIDAD DE AGUA Y RENDIMIENTO EN VIÑEDOS DE SECANO","authors":"Celerino Quezada, M. Sandoval, C. Ovalle, V. Pérez","doi":"10.29393/CHJAAS36-12ICCQ40012","DOIUrl":"https://doi.org/10.29393/CHJAAS36-12ICCQ40012","url":null,"abstract":"The use of cover crops in non-irrigated (rainfed) vineyards is a sustainable alternative in shallow hillside and low water retention soils. A study was conducted in the Mediterranean zone of centralsouthern Chile in order to evaluate the effect of different types of inter-row cover crops on soil water content and yield in a non-irrigated vineyard Vitis vinifera L. ‘Cabernet Sauvignon’. The experiment was carried out using a randomized complete block design with five treatments and four replicates. The treatments consisted of different mixtures of grass and legume species and a control treatment (without vegetation cover). Soil volumetric water content, soil water availability, grape yield and vine vigor were evaluated. The results obtained showed that the cover crops evaluated did not affect soil water availability, grape yield or vine vigor. The mixture with the best performance was tall fescue, subterranean clover and balansa clover.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48239878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.29393/chjaas36-23ecpb30023
P. Badaracco, Maximiliano Sortino, R. Pioli
Pathogenic fungi generate crop diseases, and affect yield and food production. The use of phytosanitary products to control fungal diseases can pose a risk to human health and the environment. In this context, the use of plant metabolites as potential bio-controls for pathogens turns out to be a sustainable alternative. The objective of this study was to evaluate the anti-fungal action of six compounds of plant origin: daidzein, genistein, two chalcones, vanillin and iso-vanillin, on the in vitro growth of pathogens. The Minimum Inhibitory Concentration (MIC) and the Minimum Fungicidal Concentration (CFM) of each chemical compound were evaluated by the broth micro-dilution method against five fungal genera: Alternaria sp., Cladosporium sp., Fusarium (F. graminearum, F. subglutinans, F. proliferatum, F. oxysporum ), Phomopsis longicolla, and Rhizopus stolonifer . The results indicated that daidzein, genistein, iso-vanillin and CH1 did not show an inhibitory and / or fungicidal action at concentrations lower that 250 µg mL -1 . CH2 was characterized by inhibiting four isolates belonging to three genera in different concentrations, and presenting fungicidal activity on two of them. Vanillin proved to be effective to inhibit and / or eliminate all of the isolates (nine) included in the five fungal genera evaluated at concentrations below 250 µg mL -1 . It is concluded that metabolites of plant origin such as vanillin and CH2 presented antifungal capacity in different degrees and specificity on the isolates.
{"title":"ESTUDIO DE COMPUESTOS VEGETALES CON POTENCIAL ACCIÓN ANTIFÚNGICA SOBRE PATÓGENOS DE PLANTAS CULTIVADAS","authors":"P. Badaracco, Maximiliano Sortino, R. Pioli","doi":"10.29393/chjaas36-23ecpb30023","DOIUrl":"https://doi.org/10.29393/chjaas36-23ecpb30023","url":null,"abstract":"Pathogenic fungi generate crop diseases, and affect yield and food production. The use of phytosanitary products to control fungal diseases can pose a risk to human health and the environment. In this context, the use of plant metabolites as potential bio-controls for pathogens turns out to be a sustainable alternative. The objective of this study was to evaluate the anti-fungal action of six compounds of plant origin: daidzein, genistein, two chalcones, vanillin and iso-vanillin, on the in vitro growth of pathogens. The Minimum Inhibitory Concentration (MIC) and the Minimum Fungicidal Concentration (CFM) of each chemical compound were evaluated by the broth micro-dilution method against five fungal genera: Alternaria sp., Cladosporium sp., Fusarium (F. graminearum, F. subglutinans, F. proliferatum, F. oxysporum ), Phomopsis longicolla, and Rhizopus stolonifer . The results indicated that daidzein, genistein, iso-vanillin and CH1 did not show an inhibitory and / or fungicidal action at concentrations lower that 250 µg mL -1 . CH2 was characterized by inhibiting four isolates belonging to three genera in different concentrations, and presenting fungicidal activity on two of them. Vanillin proved to be effective to inhibit and / or eliminate all of the isolates (nine) included in the five fungal genera evaluated at concentrations below 250 µg mL -1 . It is concluded that metabolites of plant origin such as vanillin and CH2 presented antifungal capacity in different degrees and specificity on the isolates.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45096605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.29393/chjaas36-15rcvp80015
Verónica Pérez, Mercedes Panzitta, Carla Vidal, S. Basconsuelo, J. Gorjon, Dámaris Fitzimons, Rosa Malpassi, Luciana Bianco
Native perennial legumes are an important component of rangelands in many parts of the world and may contribute to improve the nutritional value of natural and cultivated grazing systems. In the arid and semi-arid central region of Argentina, the domestication of species with forage potential, such as Adesmia bicolor (Poir.) DC, has begun. The objective of this work was to evaluate a crop of Adesmia bicolor (Poir.) DC and relate crop growth to biomass production, and carbohydrate mobilization dynamics during one year. To evaluate growth dynamics, seedlings and adult plants https://doi.org/10.29393/CHJAAS36-15RCVP80015 Chilean J. Agric. Anim. Sci., ex Agro-Ciencia (2020) 36(3): 172 171-180. were selected, and vegetative and reproductive variables were recorded every 7 to 10 days. In addition, aerial and ground biomass samples were taken in an area of 0,0625 m2 every 60 days and processed to determine carbohydrate mobilization dynamics. The low stem:root ratio observed in the seedlings and the clonal growth of A. bicolor adults plants favor the establishment and development of the crop, reaching its maximum vegetative growth in winter/spring. This maximum growth is determined by high cotyledonary and prophyllar branching with increased internode length. The indefinite life cycle guarantees an important photosynthetic rate that allows for not only crop persistence, but also enough carbohydrate concentration in roots and stolons, which permits a rapid recovery during regrowth. These results indicate that A. bicolor is a species that has desirable attributes for forage production.
{"title":"RITMO DE CRECIMIENTO, PRODUCCIÓN DE BIOMASA Y DINÁMICA DE MOVILIZACIÓN DE CARBOHIDRATOS EN UN CULTIVO DE Adesmia bicolor (POIR.) DC (FABACEAE)","authors":"Verónica Pérez, Mercedes Panzitta, Carla Vidal, S. Basconsuelo, J. Gorjon, Dámaris Fitzimons, Rosa Malpassi, Luciana Bianco","doi":"10.29393/chjaas36-15rcvp80015","DOIUrl":"https://doi.org/10.29393/chjaas36-15rcvp80015","url":null,"abstract":"Native perennial legumes are an important component of rangelands in many parts of the world and may contribute to improve the nutritional value of natural and cultivated grazing systems. In the arid and semi-arid central region of Argentina, the domestication of species with forage potential, such as Adesmia bicolor (Poir.) DC, has begun. The objective of this work was to evaluate a crop of Adesmia bicolor (Poir.) DC and relate crop growth to biomass production, and carbohydrate mobilization dynamics during one year. To evaluate growth dynamics, seedlings and adult plants https://doi.org/10.29393/CHJAAS36-15RCVP80015 Chilean J. Agric. Anim. Sci., ex Agro-Ciencia (2020) 36(3): 172 171-180. were selected, and vegetative and reproductive variables were recorded every 7 to 10 days. In addition, aerial and ground biomass samples were taken in an area of 0,0625 m2 every 60 days and processed to determine carbohydrate mobilization dynamics. The low stem:root ratio observed in the seedlings and the clonal growth of A. bicolor adults plants favor the establishment and development of the crop, reaching its maximum vegetative growth in winter/spring. This maximum growth is determined by high cotyledonary and prophyllar branching with increased internode length. The indefinite life cycle guarantees an important photosynthetic rate that allows for not only crop persistence, but also enough carbohydrate concentration in roots and stolons, which permits a rapid recovery during regrowth. These results indicate that A. bicolor is a species that has desirable attributes for forage production.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41844661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.29393/chjaas36-9nc30009
Carlos M. Baeza, Pedro Carrasco, Nicolás Villalobos
There are previous cytological studies in Alstroemeria pelegrina, an endemic species of Chile, but none of them clearly indicates the location of the material studied. A population of Alstroemeria pelegrina, collected from Los Molles (Region of Valparaiso), was analyzed cytotaxonomically. It was found that this population presents a 2n = 16 chromosomes and a caryotypic haploid formula 3m + 1sm + 2st + 2t. By comparing the biometric data and asymmetry indices of the karyotype of this population with previously published data, it is concluded that it is definitely the same species.
{"title":"NÚMERO CROMOSÓMICO DE UNA POBLACIÓN DE ALSTROEMERIA PELEGRINA L. (ALSTROEMERIACEAE), ESPECIE ENDÉMICA DE CHILE","authors":"Carlos M. Baeza, Pedro Carrasco, Nicolás Villalobos","doi":"10.29393/chjaas36-9nc30009","DOIUrl":"https://doi.org/10.29393/chjaas36-9nc30009","url":null,"abstract":"There are previous cytological studies in Alstroemeria pelegrina, an endemic species of Chile, but none of them clearly indicates the location of the material studied. A population of Alstroemeria pelegrina, collected from Los Molles (Region of Valparaiso), was analyzed cytotaxonomically. It was found that this population presents a 2n = 16 chromosomes and a caryotypic haploid formula 3m + 1sm + 2st + 2t. By comparing the biometric data and asymmetry indices of the karyotype of this population with previously published data, it is concluded that it is definitely the same species.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48004146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.29393/chjaas36-18vicq50018
Celerino Quezada, Richard M. Bastías, R. Quintana, Raimundo Arancibia, A. Solís
Infrared thermography is an efficient methodology to monitor plant water status under field conditions. The objective of this research was to validate the use of Crop Water Stress Index (CWSI) as an indicator of plant water status in ‘Royal Gala` apples and evaluate its effect on yield and fruit quality in the Ñuble Region, Chile. The experimental design was completely randomized blocks with two water treatments: irrigated and non-irrigated. Canopy temperature, soil moisture, xylem water potential (Ψx), fruit yield and fruit quality were evaluated. The results showed significant differences between the treatments and a moderate positive correlation between xylem water potential and CWSI (R2 = 0.67). Fruit yield and quality showed significant differences between the treatments; the non-irrigated treatment presented a decrease in size and yield, but an increase in the amount of total soluble solids. The CWSI was not a good indicator of plant water status, fruit yield or fruit quality in ‘Royal Gala’ apples.
{"title":"VALIDACIÓN DEL ÍNDICE DE ESTRÉS HÍDRICO DE CULTIVO (CWSI) MEDIANTE TERMOGRAFÍA INFRAROJA Y SU INCIDENCIA EN RENDIMIENTO Y CALIDAD EN MANZANAS ‘ROYAL GALA’","authors":"Celerino Quezada, Richard M. Bastías, R. Quintana, Raimundo Arancibia, A. Solís","doi":"10.29393/chjaas36-18vicq50018","DOIUrl":"https://doi.org/10.29393/chjaas36-18vicq50018","url":null,"abstract":"Infrared thermography is an efficient methodology to monitor plant water status under field conditions. The objective of this research was to validate the use of Crop Water Stress Index (CWSI) as an indicator of plant water status in ‘Royal Gala` apples and evaluate its effect on yield and fruit quality in the Ñuble Region, Chile. The experimental design was completely randomized blocks with two water treatments: irrigated and non-irrigated. Canopy temperature, soil moisture, xylem water potential (Ψx), fruit yield and fruit quality were evaluated. The results showed significant differences between the treatments and a moderate positive correlation between xylem water potential and CWSI (R2 = 0.67). Fruit yield and quality showed significant differences between the treatments; the non-irrigated treatment presented a decrease in size and yield, but an increase in the amount of total soluble solids. The CWSI was not a good indicator of plant water status, fruit yield or fruit quality in ‘Royal Gala’ apples.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46234956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.29393/chjaas36-19elcc60019
Carlota Catalán, M. Tejedor, Luis Pico, O. Mitjana, Cristina Bonastre, M. V. Falceto
La presencia de dientes de aguja es una preocupacion importante para el bienestar y el rendimiento de los lechones al destete. El objetivo del estudio fue comparar el rendimiento de los lechones cuando se liman los dientes, considerando la paridad de la cerda. Para ello se analizaron 1.798 lechones de genetica Hypor [cerdas Landrace x Large White cruzadas con machos German Pietrain]; 162 camadas fueron asignadas aleatoriamente a los grupos control (C: 871 lechones) o tratado (T: 915 lechones). No se detecto un efecto significativo del sexo en peso al destete (PD; P = 0,390), ganancia media diaria (GMD; P = 0,375) ni tiempo hasta el destete (TD; P = 0,785). Se detectaron efectos significativos de la interaccion grupo x paridad de la cerda (G x PC) sobre PD (P 0,05). El limado de dientes mejoro la tasa de crecimiento hasta el destete en lechones de primiparas y cerdas de 2-6 partos, pero esta tecnica no seria recomendable para lechones de cerdas maduras.
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