Pub Date : 2004-03-30DOI: 10.12702/1984-7033.V04N01A14
J. C. Mistro, L. C. Fazuoli, P. Gonçalves, O. G. Filho
The present paper aimed to study the genetic variation of 15 half-sib progenies of robust coffea ( Coffea canephora Pierre). The trial was conducted at the Instituto Agronomico de Campinas (IAC/APTA) in a randomized complete block design with seven replications and one tree-plot. Annual and joint analyses of variance were obtained to estimate the genetic paramet ers for yield, in order to quantify the genetic gain from selection in eight production years. The genotypic variation coefficient s indicated expressive genetic variability for improvement of the yield. On account of the high variation in annual production, it is recommended that selection should be based on the general mean of the years. In low yield years, larger heritability values, coefficients of genetic variation, index of genotypic determination, and genetic gains were estimated.
{"title":"Estimates of genetic parameters and expected genetic gains with selection in robust coffee","authors":"J. C. Mistro, L. C. Fazuoli, P. Gonçalves, O. G. Filho","doi":"10.12702/1984-7033.V04N01A14","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A14","url":null,"abstract":"The present paper aimed to study the genetic variation of 15 half-sib progenies of robust coffea ( Coffea canephora Pierre). The trial was conducted at the Instituto Agronomico de Campinas (IAC/APTA) in a randomized complete block design with seven replications and one tree-plot. Annual and joint analyses of variance were obtained to estimate the genetic paramet ers for yield, in order to quantify the genetic gain from selection in eight production years. The genotypic variation coefficient s indicated expressive genetic variability for improvement of the yield. On account of the high variation in annual production, it is recommended that selection should be based on the general mean of the years. In low yield years, larger heritability values, coefficients of genetic variation, index of genotypic determination, and genetic gains were estimated.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"40 1","pages":"86-91"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85821440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-03-30DOI: 10.12702/1984-7033.V04N01A08
Jefferson Luís, Meirelles Coimbra, Fernando Irajá, F. D. Carvalho, A. Oliveira
Objective of the present work was to compare the magnitude of genetic variability generated in hexaploid oat genotypes treated with two mutagenic agents: physical versus chemical. The physical agent was nearly always superior to the chemical agent, regardless of the evaluated cross or generation, providing a larger number of phenotypic classes of shorter plants. The mutant genotypes indicated a differentiated sensitivity to doses of the applied agents. This fact shows the effic iency of these agents in altering the genetic variability of this trait upwards (high height) as well as downwards (short height). I n general, data pointed to a decrease in the trait plant height under increasing agent doses. The largest degree of genetic divergence and dominance for the new dwarfing genes was obtained by doses 100 Gy and 0.5%, respectively, of mutagenic physical and chemical agents applied to UFRGS 10 genotype in the M 2 generation.
{"title":"Genetic variability induced by chemical and physical mutagenic agents in oat genotypes","authors":"Jefferson Luís, Meirelles Coimbra, Fernando Irajá, F. D. Carvalho, A. Oliveira","doi":"10.12702/1984-7033.V04N01A08","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A08","url":null,"abstract":"Objective of the present work was to compare the magnitude of genetic variability generated in hexaploid oat genotypes treated with two mutagenic agents: physical versus chemical. The physical agent was nearly always superior to the chemical agent, regardless of the evaluated cross or generation, providing a larger number of phenotypic classes of shorter plants. The mutant genotypes indicated a differentiated sensitivity to doses of the applied agents. This fact shows the effic iency of these agents in altering the genetic variability of this trait upwards (high height) as well as downwards (short height). I n general, data pointed to a decrease in the trait plant height under increasing agent doses. The largest degree of genetic divergence and dominance for the new dwarfing genes was obtained by doses 100 Gy and 0.5%, respectively, of mutagenic physical and chemical agents applied to UFRGS 10 genotype in the M 2 generation.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"36 1","pages":"48-56"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74531644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-03-30DOI: 10.12702/1984-7033.V04N01A05
A. O. Mauro, S. H. Unêda-Trevisoli, S. Mauro, M. Costa, R. C. Oliveira, N. E. Arantes
Four microsatellite sequences were tested in soybean DNA from cultivars and segregating genotypes. Three of them were close to the resistance locus rhg1 on molecular linkage group G (Satt309, Sat_168, Sat_163) and one was close to Rhg4 locus on group A2 (Sat_162). Progenies previously classified as cyst nematode (SCN) resistant and others with unknown reaction were tested, using the resistant cultivars Lideranca, and Renasscenca and the susceptibles 'Cristalina' and 'OCEPAR-4' as control. The best primer for resistance to SCN was Sat_162. Twenty segregant progenies tested with Sat_162 presented a 150 bp band for homozygous resistant genotypes and 200 bp for susceptible ones, and both for the heterozigous genotypes. Previous studies have shown that this microsatellite marker is efficient to select genotypes carrying Peking-derivative resista nce. 'Peking' takes part in the in the genealogy of all segregant progenies evaluated in this study. Thus, the obtained results showed that Sat_162 distinguished resistant and susceptible soybean genotypes to SCN, race 3.
{"title":"Efficiency of microsatellite markers in assisted selection for resistance to soybean cyst nematode (race 3)","authors":"A. O. Mauro, S. H. Unêda-Trevisoli, S. Mauro, M. Costa, R. C. Oliveira, N. E. Arantes","doi":"10.12702/1984-7033.V04N01A05","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A05","url":null,"abstract":"Four microsatellite sequences were tested in soybean DNA from cultivars and segregating genotypes. Three of them were close to the resistance locus rhg1 on molecular linkage group G (Satt309, Sat_168, Sat_163) and one was close to Rhg4 locus on group A2 (Sat_162). Progenies previously classified as cyst nematode (SCN) resistant and others with unknown reaction were tested, using the resistant cultivars Lideranca, and Renasscenca and the susceptibles 'Cristalina' and 'OCEPAR-4' as control. The best primer for resistance to SCN was Sat_162. Twenty segregant progenies tested with Sat_162 presented a 150 bp band for homozygous resistant genotypes and 200 bp for susceptible ones, and both for the heterozigous genotypes. Previous studies have shown that this microsatellite marker is efficient to select genotypes carrying Peking-derivative resista nce. 'Peking' takes part in the in the genealogy of all segregant progenies evaluated in this study. Thus, the obtained results showed that Sat_162 distinguished resistant and susceptible soybean genotypes to SCN, race 3.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"3 1","pages":"28-34"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76252255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-03-30DOI: 10.12702/1984-7033.V04N01A18
C. Rava, Joaquim Geraldo, C. Costa, J. R. Fonseca, Andréia Luiza Salgado
Objectives of the present investigation were to obtain preliminary knowledge on the variability of Curtobacterium flaccumfasciens pv. flaccumfasciens (Cff) and identify new sources of resistance to bacterial wilt of dry bean. Three isolates of Cff were inoculated on the cultivars Perola, Xamego, Rosinha G-2, Diamante Negro and Valente. Since the non-environmental variation was mainly affected by isolates and cultivars, the isolate Cff CNF 4 was selected to test dry bean genotypes for disease resistance due to its high degree of pathogenicity in a set of six cultivars. Of 333 tested accessions, 12 exhibited resistance reaction, while 85 plants showed both compatible and incompatible reactions to the pathogen. The resistant plants were selected and the families derived from these plants will be further tested to confirm the resistance reaction. The resist ant accessions and the selected ones that confirm the reaction class will be incorporated in the Embrapa Rice and Beans breeding program.
{"title":"New sources of resistance to bacterial wilt identified in dry bean germplasm collection","authors":"C. Rava, Joaquim Geraldo, C. Costa, J. R. Fonseca, Andréia Luiza Salgado","doi":"10.12702/1984-7033.V04N01A18","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A18","url":null,"abstract":"Objectives of the present investigation were to obtain preliminary knowledge on the variability of Curtobacterium flaccumfasciens pv. flaccumfasciens (Cff) and identify new sources of resistance to bacterial wilt of dry bean. Three isolates of Cff were inoculated on the cultivars Perola, Xamego, Rosinha G-2, Diamante Negro and Valente. Since the non-environmental variation was mainly affected by isolates and cultivars, the isolate Cff CNF 4 was selected to test dry bean genotypes for disease resistance due to its high degree of pathogenicity in a set of six cultivars. Of 333 tested accessions, 12 exhibited resistance reaction, while 85 plants showed both compatible and incompatible reactions to the pathogen. The resistant plants were selected and the families derived from these plants will be further tested to confirm the resistance reaction. The resist ant accessions and the selected ones that confirm the reaction class will be incorporated in the Embrapa Rice and Beans breeding program.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"9 1","pages":"111-114"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76752866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-03-30DOI: 10.12702/1984-7033.V04N01A09
A. B. Teixeira, A. Teixeira, R. Rodrigues, T. Nair, Santana Pereira, R. Bressan-Smith
Fourteen snap-bean accessions of the Germplasm Bank of the Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF) were analyzed for their morphoagronomical diversity in genotype-environment (sowing season) interaction, by multivariate analyses. The experiment was conducted in a randomized block design with four replications, in two sowing seasons (April to August - autumn/winter and October to December - summer), in 2001. The clustering grouping methods were in more agreement with autumn/winter data than with the summer data. There was a reduced similarity in the clusters among environments (sowing season). Crossings between UENF 1469 and UENF 1488 and between UENF 1469 and UENF 1486 were indicated, as well as their F 1 hybrid in combination with UENF 1488 for providing segregant generations. Accessions UENF 1486, UENF 1487, UENF 1488, UENF 1483, and UENF 1579 are also indicated for summer planting, in an experimental level.
{"title":"Genetic divergence in snap-bean (Phaseolus vulgaris L.) evaluated by different methodologies","authors":"A. B. Teixeira, A. Teixeira, R. Rodrigues, T. Nair, Santana Pereira, R. Bressan-Smith","doi":"10.12702/1984-7033.V04N01A09","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A09","url":null,"abstract":"Fourteen snap-bean accessions of the Germplasm Bank of the Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF) were analyzed for their morphoagronomical diversity in genotype-environment (sowing season) interaction, by multivariate analyses. The experiment was conducted in a randomized block design with four replications, in two sowing seasons (April to August - autumn/winter and October to December - summer), in 2001. The clustering grouping methods were in more agreement with autumn/winter data than with the summer data. There was a reduced similarity in the clusters among environments (sowing season). Crossings between UENF 1469 and UENF 1488 and between UENF 1469 and UENF 1486 were indicated, as well as their F 1 hybrid in combination with UENF 1488 for providing segregant generations. Accessions UENF 1486, UENF 1487, UENF 1488, UENF 1483, and UENF 1579 are also indicated for summer planting, in an experimental level.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"142 1","pages":"57-62"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86633358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-03-30DOI: 10.12702/1984-7033.V04N01A04
J. Viana
There are theoretical approaches about genic interaction in polygenic systems and methodologies to confirm its occurrence. However, some relevant aspects as the relative importance of the epistatic components of genotypic variance deserve further investigation. Considering complementary, duplicate, recessive, dominant, dominant and recessive epistasis, duplicate genes with cumulative effects and non-epistatic genic interaction, relative magnitudes of the epistatic components of genotypic variance assuming digenic epistasis were analyzed. Regardless of the type of epistasis and gene frequencies, the magnitudes of the epistatic components are proportional to the complexity of the polygenic system, the number of interacting genes and the magnitude of the epistatic effects relative to the deviations a (difference between the genotypic value of the homozygote with greater expression and the mean of the genotypic values of the homozygotes) and d (due to dominance). Only in simple genetic systems or in those where complementary, recessive, dominant and recessive, duplicate genes with cumulative effects, or non-epistatic gene interaction types of epistasis predominate, with high frequencies of dominant genes, epistatic components can be of reduced or negligible magnitude.
{"title":"Relative importance of the epistatic components of genotypic variance in non-inbred populations","authors":"J. Viana","doi":"10.12702/1984-7033.V04N01A04","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A04","url":null,"abstract":"There are theoretical approaches about genic interaction in polygenic systems and methodologies to confirm its occurrence. However, some relevant aspects as the relative importance of the epistatic components of genotypic variance deserve further investigation. Considering complementary, duplicate, recessive, dominant, dominant and recessive epistasis, duplicate genes with cumulative effects and non-epistatic genic interaction, relative magnitudes of the epistatic components of genotypic variance assuming digenic epistasis were analyzed. Regardless of the type of epistasis and gene frequencies, the magnitudes of the epistatic components are proportional to the complexity of the polygenic system, the number of interacting genes and the magnitude of the epistatic effects relative to the deviations a (difference between the genotypic value of the homozygote with greater expression and the mean of the genotypic values of the homozygotes) and d (due to dominance). Only in simple genetic systems or in those where complementary, recessive, dominant and recessive, duplicate genes with cumulative effects, or non-epistatic gene interaction types of epistasis predominate, with high frequencies of dominant genes, epistatic components can be of reduced or negligible magnitude.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"22 1","pages":"18-27"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83730326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-12-31DOI: 10.12702/1984-7033.V03N04A08
Fernanda Rausch, Fernandes Carrijo, E. A. Souza, Magno Antonio Patto
common bean lines including Talisma cultivar, recently recommended for cropping in Minas Gerais state, were inoculated with 65, 89 and 337 races of Colletotrichum lindemuthianum. 13,82% of the lines assessed are resistant to all races used. Talisma cultivar presented a high level of resistance to 65 and 89 races.
{"title":"Common bean lines reaction to the anthracnose pathogen","authors":"Fernanda Rausch, Fernandes Carrijo, E. A. Souza, Magno Antonio Patto","doi":"10.12702/1984-7033.V03N04A08","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N04A08","url":null,"abstract":"common bean lines including Talisma cultivar, recently recommended for cropping in Minas Gerais state, were inoculated with 65, 89 and 337 races of Colletotrichum lindemuthianum. 13,82% of the lines assessed are resistant to all races used. Talisma cultivar presented a high level of resistance to 65 and 89 races.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"78 1","pages":"297-300"},"PeriodicalIF":1.5,"publicationDate":"2003-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76022779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-12-31DOI: 10.12702/1984-7033.V03N04A12
M. Peloso, Joaquim Geraldo C. Costa, C. Rava, G. E. S. Carneiro, D. M. Soares, L. C. Faria, J. L. C. Díaz, I. F. Antunes, E. Silveira, A. Mesquita, A. Sartorato, J. C. Faria
‘BRS Valente’, developed by Embrapa Rice & Beans, has been indicated since 2001 for cropping in the states of Goias/Distrito Federal, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Espirito Santo, Rio de Janeiro and Rio Grande do Sul. In 2002, the indication was extended to the states of Sao Paulo, Parana and Santa Catarina. The grain is commercially classified as solid colored seed coat (black turtle soup) and presents superior agronomic traits such as yield potential, wide adaptation, good grain quality, erect plant type and resistance to lodging.
{"title":"'BRS Valente' - black common bean","authors":"M. Peloso, Joaquim Geraldo C. Costa, C. Rava, G. E. S. Carneiro, D. M. Soares, L. C. Faria, J. L. C. Díaz, I. F. Antunes, E. Silveira, A. Mesquita, A. Sartorato, J. C. Faria","doi":"10.12702/1984-7033.V03N04A12","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N04A12","url":null,"abstract":"‘BRS Valente’, developed by Embrapa Rice & Beans, has been indicated since 2001 for cropping in the states of Goias/Distrito Federal, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Espirito Santo, Rio de Janeiro and Rio Grande do Sul. In 2002, the indication was extended to the states of Sao Paulo, Parana and Santa Catarina. The grain is commercially classified as solid colored seed coat (black turtle soup) and presents superior agronomic traits such as yield potential, wide adaptation, good grain quality, erect plant type and resistance to lodging.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"66 1","pages":"311-314"},"PeriodicalIF":1.5,"publicationDate":"2003-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88764405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-12-31DOI: 10.12702/1984-7033.V03N04A07
M. M. Yamada, F. Faleiro, U. Lopes, J. L. Pires, A. D. Neto, Acassi Batista Flores, A. S. G. Faleiro
The objective of this work was to study the genetic variability and the heterozygosity of accessions of the Parinari (Pa) series in the collection of the Active Germplasm Bank (BAG) of the Cocoa Research Center (CEPEC), CEPLAC, Bahia using microsatellite markers. In the present study, 34 accessions of Theobroma cacao L. were used, being 25 of the Parinari series. Twelve microsatellite loci were analyzed generating a total of 49 alleles. Results indicated genetic variability among the Parinari accessions with genetic distances varying from 0.00 to 0.64 and heterozygosity levels between 11 and 72%. About 40% of the accessions presented heterozygosity equal or greater than 50%.
{"title":"Genetic variability and heterozygosity of cocoa accessions of Parinari (Pa) population, based on microsatellite markers","authors":"M. M. Yamada, F. Faleiro, U. Lopes, J. L. Pires, A. D. Neto, Acassi Batista Flores, A. S. G. Faleiro","doi":"10.12702/1984-7033.V03N04A07","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N04A07","url":null,"abstract":"The objective of this work was to study the genetic variability and the heterozygosity of accessions of the Parinari (Pa) series in the collection of the Active Germplasm Bank (BAG) of the Cocoa Research Center (CEPEC), CEPLAC, Bahia using microsatellite markers. In the present study, 34 accessions of Theobroma cacao L. were used, being 25 of the Parinari series. Twelve microsatellite loci were analyzed generating a total of 49 alleles. Results indicated genetic variability among the Parinari accessions with genetic distances varying from 0.00 to 0.64 and heterozygosity levels between 11 and 72%. About 40% of the accessions presented heterozygosity equal or greater than 50%.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"665 1","pages":"289-296"},"PeriodicalIF":1.5,"publicationDate":"2003-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77031817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-12-31DOI: 10.12702/1984-7033.V03N04A13
A. Borém, E. C. Freire, J. Penna, P. Barroso
The cotton crop has become recover its importance as a major crop in Brazil. Many growers use good management practices in their fields. One of the new technologies now available for cotton growers in many countries are the genetically modified varieties. The global area of genetically modified crop varieties has grown to 58,7 million of ha, planted by 16 countries. Although GM cotton could eventually be widely adopted, six countries present larger potential benefit of its use: China, India, US and Australia, which already are using these varieties and; Brazil and Pakistan, that still area evaluating the possibility to adopt this technology. The safety of GM varieties for the environment has been one of the main concerns addressed in the case adoption of GM cotton in Brazil. The main concern is the risk of gene flow between GM cotton and its native relatives in Brazil. Fifty species of cotton belonging to the Gossypium generum are distributed in the following continents: Asia, Africa, Oceania and America. In this paper we address the scientific basis of gene flow in cotton and some of the alternatives to make the GM technology available and safe to Brazilian growers and the environment.
{"title":"Considerations about cotton gene escape in Brazil: a review","authors":"A. Borém, E. C. Freire, J. Penna, P. Barroso","doi":"10.12702/1984-7033.V03N04A13","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N04A13","url":null,"abstract":"The cotton crop has become recover its importance as a major crop in Brazil. Many growers use good management practices in their fields. One of the new technologies now available for cotton growers in many countries are the genetically modified varieties. The global area of genetically modified crop varieties has grown to 58,7 million of ha, planted by 16 countries. Although GM cotton could eventually be widely adopted, six countries present larger potential benefit of its use: China, India, US and Australia, which already are using these varieties and; Brazil and Pakistan, that still area evaluating the possibility to adopt this technology. The safety of GM varieties for the environment has been one of the main concerns addressed in the case adoption of GM cotton in Brazil. The main concern is the risk of gene flow between GM cotton and its native relatives in Brazil. Fifty species of cotton belonging to the Gossypium generum are distributed in the following continents: Asia, Africa, Oceania and America. In this paper we address the scientific basis of gene flow in cotton and some of the alternatives to make the GM technology available and safe to Brazilian growers and the environment.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"9 1","pages":"315-332"},"PeriodicalIF":1.5,"publicationDate":"2003-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79888832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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