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首页> 外文期刊>Progress in Artificial Intelligence >Genetic Variability, Diversity and Identification of Trait-Specific Accessions from the Conserved Sunflower Germplasm for Exploitation in the Breeding Programme
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Genetic Variability, Diversity and Identification of Trait-Specific Accessions from the Conserved Sunflower Germplasm for Exploitation in the Breeding Programme

机译：来自育种计划中的保守向日葵种质中特异性种质的遗传变异，多样性和鉴定

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The objective of the study is to characterize, evaluate and classify 2149 sunflower germplasm accessions during 2011-2012 and 2012-2013 for identification of trait-specific accessions. The analysis of variance revealed significant differences among the genotypes for almost all characters which favour the selection. High heritability associated with high genetic advance as per cent of mean (GAM) was recorded for days to maturity, indicating lesser environmental influence and role of additive gene action. Moderate heritability coupled with moderate-to-low GAM was observed for seed yield per plant, head diameter and oil content, suggesting the low existence of non-additive genes. Associations among characters exist especially for head diameter, 100-seed weight and plant height in the improvement in seed yield, whereas seed yield per plant had a negative correlation with oil content. Based on cluster analysis, 416 accessions grouped under cluster IV may be considered as the genotypes with high yielding ability along with high oil content and medium maturity. The first principal component accounted for 29.20% of the total variation in the population with more contribution from oil content, while second PC contributed 57.6% to days to maturity and 50% flowering contributed maximum. DUS characters such as pigmentation of seedlings, leaf petiole, disc and stem can be considered as morphological markers to differentiate the germplasm. Ray floret colouration, plant branching, type of branching and pollen colour characters can help the breeder to identify the specific germplasm. The identified trait-specific accessions will help in effective utilization of promising accessions in the breeding.
机译：该研究的目的是在2011-2012和2012-2013期间表征，评估和分类2149葵花籽种质加入，以确定特定的特异性加入。方差分析揭示了几乎所有有利于选择的角色的基因型之间的显着差异。记录与高遗传进步相关的高遗传性，以便到期日，表明对较小的环境影响和添加剂基因作用的作用。对于每株种子产量，头直径和油含量，观察到与中等至低GAR耦合的中度遗传性，表明非添加基因的低存在性。人物之间的关联特别适用于种子产量的直径，100种种子重量和植物高度，而每个植物的种子产量与油含量负相关。基于聚类分析，在群体IV下分组的416种可被认为是具有高屈服能力的基因型以及高油含量和中等成熟度。第一批主要成员占石油含量贡献更多贡献的29.20％，而第二台PC贡献了57.6％至成熟日期，50％开花最大贡献。幼苗，叶片叶柄，椎间盘和茎的色素沉着等DUS字符可以被视为形态标志物，以区分种质。 Ray Floret Colouration，植物分支，分支类型和花粉颜色人物可以帮助育种者鉴定特定种质。确定的特质特异性加入将有助于有效地利用繁殖中的有希望的进入。

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