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A novel and high throughput wheat (Triticum aestivum L.) genotyping using Kompetitive Allele Specific PCR assay for genes underpinning major economic attributes 利用竞争性等位基因特异性PCR方法对小麦主要经济属性基因进行分型
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-12-01 DOI: 10.21162/pakjas/21.900
Huma Tariq
Wheat breeding programs are increasingly using molecular tools to improve efficiency and speed of developing productive cultivars. Molecular markers such as Kompetitive Allele Specific PCR (KASP) have now become a principal approach to study genetic relationship among various wheat species. The objective of our research study was to identify and distinguished the wheat parents and their hybrid for genes controlling major agronomical attributes. Germplasm comprised of fifteen genotypes were genotyped for gluten strength (Glu A1, Glu D1), height reduction (Rht 1), starch quality (Waxy), vernalization (Vrn A1, Vrn B1), photoperiod sensitivity (Ppd 1), Tan spot disease (Tns-1) and leaf rust disease (Lr34). Statistical analysis with endpoint genotyping, graphical display and principal coordinate revealed significant results for KASP assay. Most variable crosses were S3 X I1, S3 X I3, S2 X I1, S2 X I2 and S1 X I1 with maximum segregants. Whereas, variation was observed for Glu-D1, Tsn1, Glu-A1 followed by Lr34 alleles. Therefore, the objective was achieved successfully with the most reliable KASP markers. The diverse attributes dissected, and key hybrids identified in this study would provide guidance for the improvement of the economically important traits and provide understanding of genetic variability in distinct segregating populations. Besides we have identified significantly important partial mutants in the germplasm for Waxy allele. These findings could provide the end user with wheat products with improved quality such as with or without amylose content.
小麦育种计划越来越多地使用分子工具来提高生产品种的开发效率和速度。分子标记如竞争等位基因特异性PCR(KASP)已成为研究不同小麦品种间遗传关系的主要方法。本研究的目的是鉴定和区分小麦亲本及其杂交种的主要农艺性状控制基因。对由15个基因型组成的种质进行了谷蛋白强度(Glu A1、Glu D1)、高度降低(Rht1)、淀粉品质(Waxy)、春化(Vrn A1、Vrn B1)、光周期敏感性(Ppd 1)、斑点病(Tns-1)和叶锈病(Lr34)的基因分型。终点基因分型、图形显示和主坐标的统计分析显示KASP测定的显著结果。大多数可变杂交为S3 X I1、S3 X I3、S2 X I1,S2 X I2和S1 X I1。而Glu-D1、Tsn1、Glu-A1和Lr34等位基因则存在变异。因此,使用最可靠的KASP标记成功实现了该目标。本研究中分析的不同属性和确定的关键杂交种将为改善经济上重要的性状提供指导,并提供对不同分离群体遗传变异性的理解。此外,我们已经在Waxy等位基因的种质中鉴定了显著重要的部分突变体。这些发现可以为最终用户提供具有改进质量的小麦产品,例如具有或不具有直链淀粉含量。
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引用次数: 0
Effect of supplementation of nano zinc in male quail diets on performance, some blood parameters, testis morphology and meat colour properties 添加纳米锌对公鹌鹑生产性能、某些血液参数、睾丸形态和肉色特性的影响
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-12-01 DOI: 10.21162/pakjas/21.240
B. Sevim
This research was conducted to determine the effects of different levels (0, 50 or 100 mg/kg) of nano zinc (nano Zn) supplementation as a zinc source in male Japanese quail (Coturnix coturnix Japonica) diets on performance, some serum parameters, testis characteristics and meat colour. In the four-week study, a total of 60 male Japanese quails (190.4 ± 2.4 g body weight) at the age of 49 days were distributed to three treatment groups and each treatment group was divided into four subgroups, each containing five male quails. As a result of this study, in the current study, the addition of nano Zn to the diet had no effect on feed intake, testis morphology, serum cholesterol, total protein, calcium and phosphorus levels (P>0.05). Addition of nano Zn to diet increased body weight gain (BGW) (P<0.05). With the addition of nano Zn, serum glucose level increased while serum triglyceride level decreased (P<0.05). Breast and thigh + drumstick L* values among meat parameters increased with the addition of nano Zn to male quail diets (P<0.05). As a result, adding nano Zn to male quail diets increased serum glucose level and meat L* value, decreased serum triglyceride concentration, and testis morphology was not affected.
本试验旨在研究在雄性日本鹌鹑(Coturnix Coturnix Japonica)饲粮中添加不同水平(0、50和100 mg/kg)纳米锌(nano Zn)作为锌源对其生产性能、部分血清参数、睾丸特征和肉色的影响。选取体重(190.4±2.4 g) 49日龄雄性日本鹌鹑60只,随机分为3个处理组,每个处理组又分为4个亚组,每亚组5只。综上所述,在本研究中,饲粮中添加纳米锌对采食量、睾丸形态、血清胆固醇、总蛋白、钙和磷水平均无影响(P < 0.05)。饲粮中添加纳米锌可提高猪体增重(BGW) (P<0.05)。添加纳米锌后,血清葡萄糖水平升高,血清甘油三酯水平降低(P<0.05)。随着纳米锌添加量的增加,雄鹌鹑胸肉和大腿+鸡腿肉的L*值显著升高(P<0.05)。结果表明,饲粮中添加纳米锌可提高雄鹌鹑血清葡萄糖水平和肉质L*值,降低血清甘油三酯浓度,对睾丸形态无影响。
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引用次数: 0
Effect on Sitophilus oryzae infestation on amylose content and weight loss of eight rice varieties 稻瘟病对8个水稻品种直链淀粉含量和失重的影响
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-12-01 DOI: 10.21162/pakjas/21.480
S. Syarifah Zulaikha
Sitophilus oryzae is one of the primary pests that causes severe damage to food products. Damage of the grains cause a drastic dropping of rice quality, which significantly affected our rice industry. The amylose content and weight loss are two components that are affected due to the S. oryzae infestation. In this study, eight rice varieties namely Thai Pathumthani Fragrant White Rice 100%, Vietnam Long Grain White Rice 5%, Pakistan Basmathi Long Grain White Rice PK 385, Indian Steam Pusa 1121 Basmathi LGWR, Thai White Rice, Pakistan White Rice, Cambodian Fragrant Sen Kro Oub 5%, and Vietnamese White Fragrant Rice 2% were collected to investigate the amylose content and weight loss after six-month durations of the S. oryzae infestation. ANOVA analysis has shown a significant value, p-value=0.00, p <0.05 for the relationship between amylose content and rice varieties, whereas the weight loss in the eight rice varieties also showed a significant value, p-value= 0.00, p< 0.05. The Pakistan White Rice has recorded the highest percentage of weight loss (55.8%), while Cambodian Fragrant Sen Kro Oub 5% showed the lowest percentage of weight loss (23%). Despite the significant weight loss, the amylose content in each rice variety has showed a low rate, 2-9%. Results obtained from this study are considered as a fundamental data to strategize the S. oryzae pest management to make sure the continuity of rice supply for Malaysia
稻瘟病菌是对食品造成严重危害的主要害虫之一。粮食的破坏导致稻米质量急剧下降,这对我们的稻米工业产生了重大影响。直链淀粉含量和重量损失是受米曲霉侵扰影响的两个成分。在本研究中,8个水稻品种,即泰国Pathumthani香米100%、越南长粒白米5%、巴基斯坦Basmathi长粒白饭PK 385、印度Steam Pusa 1121 Basmathi LGWR、泰国白米、巴基斯坦白米、柬埔寨香米Sen Kro Oub 5%,收集2%的越南白香米,以调查米曲霉感染6个月后的直链淀粉含量和重量损失。方差分析显示,直链淀粉含量与水稻品种之间的关系具有显著值,p值=0.00,p<0.05,而8个水稻品种的体重损失也具有显著值(p值=0.000,p<0.05)。巴基斯坦白米的减肥率最高(55.8%),而柬埔寨香米5%的减肥率最低(23%)。尽管有显著的重量损失,但每个水稻品种的直链淀粉含量都显示出较低的比率,为2-9%。这项研究的结果被认为是制定稻瘟病防治策略的基础数据,以确保马来西亚水稻供应的连续性
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引用次数: 1
Training needs of Pakistani farmers regarding recommended production technology of rice 巴基斯坦农民对推荐的水稻生产技术的培训需求
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-12-01 DOI: 10.21162/pakjas/21.141
I. Riaz
The training needs of rice growers in Punjab, Pakistan were assessed regarding the production technology used in growing rice. Total 332 rice growers were selected through random sampling technique from tehsil Nowshera Virkan, district Gujranwala and interviewed accordingly through a face to face interview technique. Data was analyzed using Statistical Package for Social Sciences (SPSS). Frequency, percentages, weighted mean and chi-square techniques were run on the data. Production technology was divided into two sections (i) major aspects and (ii) sub-aspects. Major aspects were 8 in number and 46 in sub-aspects. Findings indicated that almost 60 and 14.2% of the respondents had a low and medium level of training need. 21.5% of respondents had a high level of training needs. The average score of 128.28 indicated the medium level of training needs for the sampled farmers. Among major aspects, weed management and seed and seedlings embarked high level of training need. Whereas, in sub-aspects, 30 aspects show a low level of training, 12 in medium and 04 at a high level. Chisquare confirmed that socio-economic attributes and training need was no different. However, lower educational level in the area as 47.9% of respondents had no education asks for the due attention from the department of extension to formulate training programs for the farmers materializing the need and socio-economic position of the farmers.
评估了巴基斯坦旁遮普省水稻种植者在种植水稻所使用的生产技术方面的培训需求。通过随机抽样技术从古吉兰瓦拉区tehsil Nowshera Virkan选取332名水稻种植者,并通过面对面访谈技术对其进行访谈。数据分析采用SPSS (Statistical Package for Social Sciences)软件。使用频率、百分比、加权平均值和卡方技术对数据进行分析。生产技术分为两个部分(1)主要方面和(2)次要方面。主要相位有8个,子相位有46个。调查结果显示,近60%和14.2%的受访者有中低水平的培训需求。21.5%的受访者有高水平的培训需求。平均得分为128.28分,表明被调查农民的培训需求处于中等水平。在主要方面中,杂草管理和种苗需要开展高水平的培训。从子方面来看,低水平的有30个,中等水平的有12个,高水平的有04个。Chisquare证实,社会经济属性和培训需求没有什么不同。然而,该地区受教育程度较低(47.9%的受访者没有受过教育),要求推广部门给予应有的重视,制定针对农民的培训计划,以体现农民的需求和社会经济地位。
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引用次数: 0
Asymmetric effects of diesel prices and exchange rates on turkey's food prices 柴油价格和汇率对土耳其食品价格的不对称影响
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-12-01 DOI: 10.21162/pakjas/21.1452
E. Kadanali
This study analyses the asymmetric effects of the swings in diesel prices and exchange rates on Turkey’s food prices with the Non-Linear Autoregressive Distributed Lag (NARDL) model. For this purpose, Turkey’s diesel prices, exchange rate, and general food price index data for the same period between January 2000 and December 2019 were adopted. Considering that diesel prices are an essential cost item in agricultural production, it becomes crucial to determine the effect on food prices. Besides, the exchange rate fluctuations are expressed as another important macro variable that impacts food prices. As a result of the NARDL model, asymmetric co-integration between the general food price index, diesel prices, and the exchange rate was determined. Still, it has been observed that the negative and positive changes in diesel prices on food prices, in the long run, do not have a significant effect. On the other hand, the negative effect of the exchange rate was significant. It is concluded that a 1% decrease in the negative changes in the exchange rate will cause 0.94% decrease in food prices. Consequently, the general food price is affected by adverse shocks on the exchange rate in the long run. One may be concluded that the exchange rate should be considered while formulating policies about the swings in food prices. Especially, the local production of agricultural inputs affected by exchange rate fluctuations could be encouraged.
本研究采用非线性自回归分布滞后(NARDL)模型分析了柴油价格和汇率波动对土耳其食品价格的不对称影响。为此,采用了土耳其2000年1月至2019年12月同期的柴油价格、汇率和一般食品价格指数数据。考虑到柴油价格是农业生产中的一个重要成本项目,确定其对食品价格的影响变得至关重要。此外,汇率波动是影响粮食价格的另一个重要宏观变量。作为NARDL模型的结果,确定了一般食品价格指数、柴油价格和汇率之间的不对称协整。尽管如此,有人观察到,从长远来看,柴油价格对食品价格的正负变化不会产生显著影响。另一方面,汇率的负面影响是显著的。得出的结论是,汇率负变化下降1%将导致食品价格下降0.94%。因此,从长远来看,一般粮食价格受到汇率不利冲击的影响。可以得出的结论是,在制定有关粮食价格波动的政策时,应该考虑汇率。特别是,可以鼓励受汇率波动影响的当地农业投入生产。
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引用次数: 0
Evaluation of eggplant genotypes and coat protein cistron based characterization of cucumber mosaic virus eggplant isolates of subgroup IB from Pothwar region of Pakistan 茄子基因型评价及巴基斯坦Pothwar地区黄瓜花叶病毒IB亚群茄子分离物外壳蛋白顺顺子鉴定
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-11-01 DOI: 10.21162/pakjas/21.1460
M. Ashfaq
Cucumber mosaic virus (CMV) is a destructive and menace to a wide range of plant species including eggplant crop worldwide. This study was carried out to define the current status of CMV infecting eggplant crop in Pothwar region of Pakistan and characterization of CMV eggplant isolates as well as to recognize the sources of resistance in eggplant genotypes. A total of 660 leaf samples with the virus and virus-like symptoms were collected from different sites of Pothwar region and subjected to CMV specific DAS-ELISA using monoclonal antibodies. ELISA results indicated that approximately 56% of samples were positive for CMV infection and the disease incidence was highest (62.50%) in Jhelum district followed by Rawalpindi (58.33%), Chakwal (58.33%) and Attock (55.55%) districts with the lowest disease incidence (46.15%) was recorded in Islamabad district. Two ELISA positive samples from each district were further confirmed by RT-PCR and subsequently sequenced based on their coat protein cistron. All isolates were identical to each other so the nucleotide sequence of one eggplant isolate (CMV-Pak) was deposited in GenBank with accession number MH119063. BLAST and phylogenetic analysis revealed that CMV-Pak eggplant isolate shared 90-94% nucleotide and 80-100% amino acid similarities with other isolates available in GenBank. Moreover, 10 eggplant genotypes were tested against CMV-Pak eggplant isolate, ELISA results categorized three genotypes (Singh Nath 666, Neelum, and Brinjal Jamak) as moderately resistant, two genotypes (Round Black, and Global Brinjal PPL) as susceptible and rest of the five genotypes (Bemissal, Brinjal Shilpa, Short Purple, Brinjal PPL, and Namyal Ratchburi) as moderately susceptible. Therefore, the three moderately resistant genotypes could be recommended to farmers for farming and plant breeders for developing new eggplant resistant genotypes to CMV. To the best of our knowledge, this study is the first time provided evidence that CMV infects eggplant in Pakistan.
黄瓜花叶病毒(CMV)对包括茄子在内的世界各地的多种植物都具有破坏性和威胁性。本研究旨在确定巴基斯坦Pothwar地区茄子作物感染CMV的现状、CMV茄子分离株的特征以及识别茄子基因型的抗性来源。从Pothwar地区的不同地点收集了总共660个具有病毒和病毒样症状的叶片样本,并使用单克隆抗体对其进行CMV特异性DAS-ELISA。ELISA结果表明,约56%的样本对CMV感染呈阳性,Jhelum区的发病率最高(62.50%),其次是拉瓦尔品第区(58.33%)、Chakwal区(58.33%)和Attock区(55.55%),伊斯兰堡区发病率最低(46.15%)。来自每个地区的两个ELISA阳性样本通过RT-PCR进一步确认,随后基于其外壳蛋白顺反子进行测序。所有分离株彼此相同,因此一个茄子分离株(CMV-Pak)的核苷酸序列以登录号MH119063保藏在GenBank中。BLAST和系统发育分析表明,CMV-Pak茄子分离株与GenBank中的其他分离株具有90-94%的核苷酸和80-100%的氨基酸相似性。此外,对10种茄子基因型对CMV-Pak茄子分离株进行了测试,ELISA结果将三种基因型(Singh-Nath 666、Neelum和Brinjal Jamak)归类为中度抗性,两种基因型为易感基因型(Round Black和Global Brinjal-PPL),其余五种基因型中的其余基因型(Bemissal、Brinjal-Shilpa、Short Purple、Brinhal PPL和Namyal Ratchburi)归类为中等易感基因。因此,这三种中度抗性基因型可推荐给农民耕种和植物育种家,以开发新的茄子抗CMV基因型。据我们所知,这项研究首次提供了CMV感染巴基斯坦茄子的证据。
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引用次数: 1
The performance of potential wheat genotypes across diverse environments of Pakistan 巴基斯坦不同环境下潜在小麦基因型的表现
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-11-01 DOI: 10.21162/pakjas/21.1226
M. Zubair
In Pakistan, wheat used as a staple food that provides necessary nutrients and has a wide adaptation in different environments. A set of 18 wheat (Triticum aestivum L.) genotypes were tested at 23 different locations (Environments) in all over Pakistan. The AMMI biplot analysis was used to identify the genotypes performance across the environments and Genotype Environment Interaction (GEI). The G5 and G6 genotypes performed excellent across the 23 environments, therefore their yield performance are stable at all locations of Pakistan during 2015-16. While, G4, G5, G11, G17 performed very well at all locations during 2016-17. The performance of G5 genotype remains stable in both year of study at all locations so we strongly recommend for cultivation in any region of Pakistan. The G1 (E13), G16 (E14), G11 (E2), G3 & G5 (E18), G14 (E15, E19), and G7, G10 (E10) these genotypes perform well in specific environment and so respective genotypes recommended for specific region where performance remains excellent. The selection of ideal environment in which performance of genotypes are excellent. The three environments (E4, E1 and E10) are best environment in which all genotypes perform very well during both years of study
在巴基斯坦,小麦被用作主食,提供必要的营养,并能广泛适应不同的环境。在巴基斯坦各地的23个不同地点(环境)测试了一组18种小麦(Triticum aestivum L.)基因型。AMMI双批次分析用于确定跨环境的基因型表现和基因型-环境相互作用(GEI)。G5和G6基因型在23个环境中表现优异,因此在2015-16年期间,它们在巴基斯坦所有地区的产量表现都是稳定的。而G4、G5、G11、G17在2016-17年期间在所有地点都表现良好。G5基因型在研究的两年中在所有地点的表现都保持稳定,因此我们强烈建议在巴基斯坦的任何地区种植。G1(E13)、G16(E14)、G11(E2)、G3和G5(E18)、G14(E15、E19)以及G7、G10(E10)这些基因型在特定环境中表现良好,因此推荐用于表现保持优异的特定区域的相应基因型。选择基因型表现优异的理想环境。这三种环境(E4、E1和E10)是所有基因型在两年研究中表现良好的最佳环境
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引用次数: 0
Cultural resources: tourism and its impact on environment 文化资源:旅游及其对环境的影响
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-11-01 DOI: 10.21162/pakjas/21.1388
Sahib Oad
Pakistan is rich in cultural and natural resources and these resources proved to be helpful for the promotion of the tourism sector in the country. This sector does not only contribute to the national economy but also generates thousands of job opportunities in the country. Apart from economic development, Tourism affects adversely the environment. According to the previous studies, there is a relationship between TM and the degradation of the environment. We design this study to find the linkages between Tourism (TM), CO2 emissions (CEs), GDP per capita (GDPPC) and Energy Use (EU). The annual data from 1995 to 2014 is used to examine the relationship among factors. The Fully Modified Ordinary Least Square (FMOLS) approach is used to analyse the data. The findings indicated that there is a positive relationship between TM and CEs but not significant at 5%. Moreover, the results indicate that the GDPPC and EU have a positive and significant relationship with CEs because the P-values of both variables’ coefficients are lesser than 5%. This study reveals that energy, used by the industrial sector, enhances CEs, validating that CEs registered a substantial rise because the industrial sector was using more energy rather than other sectors like tourism.
巴基斯坦拥有丰富的文化和自然资源,事实证明,这些资源有助于促进该国的旅游业。该部门不仅为国民经济做出贡献,而且在该国创造了数千个就业机会。除了经济发展,旅游业对环境也有不利影响。根据以往的研究,TM与环境退化之间存在一定的关系。本研究旨在寻找旅游业(TM)、二氧化碳排放(CEs)、人均GDP (GDPPC)和能源使用(EU)之间的联系。使用1995 - 2014年的年度数据来检验各因素之间的关系。采用全修正普通最小二乘(FMOLS)方法对数据进行分析。结果表明,TM与ce之间存在正相关关系,但在5%的水平上不显著。此外,结果表明,gdp ppc和EU与ce之间存在显著正相关关系,因为这两个变量的系数p值都小于5%。这项研究表明,工业部门使用的能源提高了消费水平,证实了消费水平的大幅上升,因为工业部门比旅游业等其他部门使用更多的能源。
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引用次数: 1
Phenotypic and molecular divergence in maize (Zea mays L.) ecotypes 玉米(Zea mays L.)生态型的表型和分子差异
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-11-01 DOI: 10.21162/pakjas/21.1469
Ramsha Javed
Genetic characterization of maize genotypes is of great importance in maize breeding program to identify diverse populations and divergent genotypes. Divergence and genetic diversity were assessed in a set of 20 maize genotypes representing popcorn, white corn, sweet corn and yellow corn, through morphological characteristics and Random Amplified Polymorphic DNA (RAPD) markers. Field experiment was conducted in randomized complete block design with three replications. Morphological data revealed that sweet corn genotype SCLY-1 was earlier in days to 50% pollen shedding than other genotypes while white corn genotype WL-3 was earlier in days to 50% silking. Maximum plant height was recorded for PCLY-5 (133.3 cm) while lowest for WL-4 (92.8 cm), whereas highest ears height was recorded for popcorn PCLY-1 (64.4 cm) and lowest (29.4 cm) for SCLY-5. The yellow corn had maximum (4.5 kg) grain yield at harvest as compared to sweet and popcorn (3.0 kg). Negative but weak correlation was recorded between ear height and grain yield. Cluster analysis based on yield related parameters grouped all the studied genotypes in to five sub clusters. Molecular genotyping based on four primers amplified 37 loci which were (100%) polymorphic. Maximum elven loci were identified by primer GLA-04, while minimum was reported for primer GLA-03. The loci GLD-18B1000, GLA-04B300 recorded highest gene diversity (0.500) followed by loci GLE05B750, GLE-05B650 and GLE-05B550. The loci of primer GLD-18 (GLD-18B1000) detected highest alleles evenness and Simpson’s diversity index of 1.00 and 0.526, respectively. Maximum gene diversity (0.354) among populations were recorded for yellow corn, while the minimum was detected for white corn (0.254), while genotypic diversity was same for all maize types. Cluster analysis based on molecular genotypic data grouped the maize genotypes into four distinct groups. Lack of concordance was observed while comparing the clustering based on phenotypic and molecular data. The overall diversity among the studied maize genotypes could be used in future maize breeding program.
玉米基因型的遗传特征在玉米育种计划中对识别不同群体和不同基因型具有重要意义。通过形态学特征和随机扩增多态DNA(RAPD)标记,对代表爆米花、白玉米、甜玉米和黄玉米的20种玉米基因型的差异性和遗传多样性进行了评估。田间试验采用随机完全区组设计,三次重复。形态学数据显示,甜玉米基因型SCLY-1比其他基因型早脱落50%花粉,而白玉米基因型WL-3早吐丝50%。PCLY-5的最高株高为133.3厘米,WL-4的最低株高为92.8厘米,而爆米花PCLY-1的最高穗高为64.4厘米,SCLY-5的最低穗高为29.4厘米。与甜玉米和爆米花(3.0公斤)相比,黄色玉米在收获时的粮食产量最高(4.5公斤)。穗高与产量呈负相关,但相关性较弱。基于产量相关参数的聚类分析将所有研究的基因型分为五个子聚类。利用4个引物进行分子分型,共扩增出37个多态位点(100%)。引物GLA-04鉴定了最大的elven基因座,而引物GLA-03报告了最小的elven位点。基因座GLD-18B1000、GLA-04B300的基因多样性最高(0.500),其次是基因座GLE05B750、GLE-05B650和GLE-05B550。引物GLD-18(GLD-18B1000)的等位基因均匀度和Simpson多样性指数最高,分别为1.00和0.526。黄玉米群体间的基因多样性最高(0.354),白玉米群体间基因多样性最低(0.254),而所有玉米类型的基因型多样性相同。基于分子基因型数据的聚类分析将玉米基因型分为四个不同的组。在比较基于表型和分子数据的聚类时,观察到缺乏一致性。所研究的玉米基因型之间的总体多样性可用于未来的玉米育种计划。
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引用次数: 0
Quality assessment of used edible fats and oils by local vendors of Faisalabad 费萨拉巴德当地供应商对使用过的食用油脂的质量评估
IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2021-11-01 DOI: 10.21162/pakjas/21.1200
W. Ahmed
Fats and oils are both economically and scientifically important in food systems and play an important role in nutrition. The principal causes of fat degradation are oxidation and hydrogenation, which have a detrimental impact on quality aspects of oils and fats such as color, texture, flavor, aroma, consistency, and appearance. The current research was conducted to determine the oil degradation factors by collecting fifty samples of fried oils used by street vendors from twenty-five different locations in Faisalabad area in order to assess the quality parameters of locally available fats and oil products. Procured samples underwent physicochemical tests to determine the degree of degradation and oxidation. The parameters analyzed for quality evaluation include free fatty acids (FFA), peroxide value (PV), iodine value (IV), saponification value (SV), viscosity, refractive index (RI), p-anisidine value (p-AV), thiobarbeturic acid value (TBA), specific gravity (SG) and fatty acid profile through gas chromatograph equipped with flame ionization detector. The analyses revealed significant oxidation and degradation in many of the vendor fried fats and oil that were procured. Physicochemical characteristics as well as oxidative stability attributes were deviated from the standard values defined by Codex Alimentarius and Punjab Pure Food Regulations (PPFR). In majority of the samples, the fatty acid profile exhibited increased levels of trans-9-elaidic acid and linolelaidic acid, indicating the presence of trans-fatty acid because of hydrogenation and high-temperature frying of fats and oils. The overall quality of most procured samples was in decline from recommended standards and unsuitable for frying and edible purposes
油脂在经济上和科学上在食品系统中都很重要,在营养中起着重要作用。脂肪降解的主要原因是氧化和氢化,这对油脂的质量方面有不利的影响,如颜色、质地、风味、香气、稠度和外观。目前的研究是通过收集来自费萨拉巴德地区25个不同地点的街头摊贩使用的50份油炸油样品来确定油的降解因素,以评估当地可获得的脂肪和油产品的质量参数。获得的样品经过物理化学测试,以确定降解和氧化的程度。通过配备火焰电离检测器的气相色谱仪分析质量评价参数包括游离脂肪酸(FFA)、过氧化值(PV)、碘值(IV)、皂化值(SV)、粘度、折射率(RI)、对茴香胺值(p-AV)、硫代巴比酸值(TBA)、比重(SG)和脂肪酸谱。分析显示,许多供应商的油炸脂肪和油被明显氧化和降解。理化特性和氧化稳定性属性偏离了食品法典和旁遮普纯食品法规(PPFR)定义的标准值。在大多数样品中,脂肪酸谱显示出反式9-油酸和亚油酸的水平增加,表明由于脂肪和油的氢化和高温油炸,反式脂肪酸的存在。大部分采购样本的整体质素低于建议标准,不适合煎炸及食用
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引用次数: 3
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Pakistan Journal of Agricultural Sciences
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