Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (5): 1120-1125.DOI: 10.16178/j.issn.0528-9017.20240914

Previous Articles     Next Articles

Analysis on genetic stability and selection effect of morphological characteristics of tubers of Niuwei yam

WANG Yiqin1,2(), HAN Shu1, LONG Wenhong1,*()   

  1. 1. College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan
    2. Zhenning Autonomous County Agriculture and Rural Bureau, Anshun 561200, Guizhou
  • Received:2024-11-29 Online:2025-05-11 Published:2025-05-20

Abstract:

There are irregular phenomena such as tuber length, diameter, and stem length in the production of Niuwei yam. In order to study the genetic stability of its tuber traits and select excellent lines, Niuwei yam was taken as the research object to investigate the genetic laws of underground tuber morphology characteristics. The results showed that the order of coefficient of variation was tuber cylinder index(18.84%)>evenness index of upper part of tuber(14.44%)>evenness index of lower part of tuber(12.30%)>tuber swelling index(10.65%). The order of coefficient of genetic variation was tuber cylinder index(11.10%)>tuber swelling index(8.49%)>evenness index of upper part of tuber(7.22%)>evenness index of lower part of tuber(6.02%). The generalized heritability of evenness index of upper part of tuber and evenness index of lower part of tuber were 16.09% and 16.48%, respectively. The order of the optimization degree of the four indexes of the clonal progeny was tuber cylinder index(59.85%) > evenness index of lower part of tuber(27.16%)>evenness index of upper part of tuber(20.98%)>tuber swelling index(0.97%). Therefore, it is recommended to choose yam plants with swollen tubers which have uniform length and thickness to develop excellent varieties.

Key words: Niuwei yam, tuber, morphological characteristics, coefficient of variation, heritability, selection effect

CLC Number: