Genetic Potential of Agronomic Traits and Seed Physicochemical Properties of Novel Jatropha Lines Developed from Complex Interspecific Hybridization

Narathid Muakrong, P. Srinives
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Abstract

Fifteen jatropha lines were obtained from complex crossing between progenies derived from interspecific hybridization of Jatropha curcas and J . integerrima . They were evaluated for variability and association in yield, yield components, oil content, fatty acid composition, phorbol esters content, and growth characters . The major fatty acids in seed were oleic and linoleic acids, with a negative correlation among them. Seed yield showed a positive correlation with number of fruits per inflorescence and seeds per fruit, 100 seed weight and canopy size . A path coefficient analysis showed that number of fruits per inflorescence and canopy width had high positive direct relationship with seed yield per plant . Most characters showed high broad - sense heritability . Clustering by traits classified the breeding lines into five groups with a large distance between groups . The members in each group comprised lines of the same or similar pedigrees . Cluster I was the high seed yield group comprising two accessions (KUJL23 and KUJL18) . Clustering based on principle components classified them into four groups . The lines in cluster II and III from cluster analysis were included in one group, while members of the other groups were the same in both clustering methods .
复杂种间杂交麻风树新品系农艺性状和种子理化性状的遗传潜力
麻疯树与J .种间杂交后代复杂交获得15个麻疯树品系。integerrima。评估了它们在产量、产量成分、含油量、脂肪酸组成、酚酯含量和生长性状方面的变异性和相关性。种子中主要脂肪酸为油酸和亚油酸,两者之间呈负相关关系。种子产量与每花序果数、每果种子数、百粒重和冠层大小呈正相关。通径系数分析表明,单花序果数和冠层宽度与单株种子产量呈正相关。多数性状具有较高的广义遗传力。性状聚类将选育品系划分为5个类群,类群间距离较大。每一组的成员都有相同或相似的血统。聚类1为高产群,由KUJL23和KUJL18两个品种组成。基于主成分聚类将其分为四类。聚类分析中聚类ⅱ和聚类ⅲ的株系归为一组,而两种聚类方法中其他组的成员相同。
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