高粱产量及产量成分稳定性的通径分析

本文利用S.A.Eberhart等提出的“稳定性参数法”估计了1987年四川省高粱区试的6个品种(组合)的产量及产量成分的稳定性参数,并进行了产量及产量成分在稳定性反应“b”上的通径分析。结果表明:85-31、青壳洋高粱、矮马尾具有较好的丰产性和稳产性;在“S_d~2”较小时,产量稳定性主要与穗粒数的稳定性反应呈正相关,与千粒重的稳定性反应呈负相关,而穗粒数和千粒重表现一种互补关系。

A PATH ANALYSIS OF STABILITY OF THE YIELD AND THE YIELD COMPONENTS OF SORGHUM

This paper, using the method of stability parameter suggested by S. A. Eberhart et al, appraises the stability parameters on the yield and its components of six sorghum varieties (hybrid) which were tested at eight sites in 1987's Sichuan Sorghum Region test A path analysis was carried out on the stability parameter "b" of the yield and its components. The result shows that the productivity and the yield stability of the varieties'of "85-31", "Qing Ke Yang Gao Liang", "Ai Ma Wei" are better than any others. In the case of lower "Sd~2', the yield stability was found to be related positively to the stability of kernels per ear, negatively to the stability of 1000-grain weight but there existed a mutual compensation between kernel per ear and 1000-grain weight.