International Institute of Tropical Agriculture P.M.B. 5320, Ibadan, Nigeria.
Theor Appl Genet. 1984 Dec;69(2):217-21. doi: 10.1007/BF00272898.
Phenotypic variances, genetic coefficients of variation, repeatability, expected genetic advance, correlation coefficients and path coefficients were estimated for seven agronomic traits in yellow yam. Plant leafiness, leaf virus infection, number of tubers per hill and tuber yield showed higher expected genetic advances associated with higher repeatability. Positive and highly significant correlations of tuber yield with plant leafiness, shoot height and vine dry weight were observed. Correlations of time to vine emergence and leaf virus infection with yield were negative. Path analysis showed that leaf virus infection had a large negative direct as well as indirect effect on yield. Based on these studies, it is suggested that resistance to leaf virus infection, as expressed by foliage vigour, is the chief criterion for selecting high yielding plant types in yellow yam.
对黄肉芋的 7 个农艺性状进行了表型方差、遗传变异系数、可重复性、预期遗传进展、相关系数和通径系数的估计。植株繁茂度、叶片病毒感染、每墩块茎数和块茎产量表现出更高的预期遗传进展和更高的可重复性。观察到块茎产量与植株繁茂度、茎高和藤干重呈正相关且高度显著。与产量呈负相关的还有藤苗出土时间和叶片病毒感染。通径分析表明，叶片病毒感染对产量有很大的直接和间接负向影响。基于这些研究，建议以叶片活力来表示对叶片病毒感染的抗性，作为选择黄肉芋高产植株类型的主要标准。
