小麦收获指数、生物产量和籽粒产量的稳定性分析

Stability Analysis of Harvest Index,Biomass and Grain Yield in Wheat

对９个小麦基因型在四川省７个不同生态环境下的收获指数、生物产量和籽粒产量的稳定性研究表明，这３个性状均与环境间存在极显著互作，其稳定性参数ｂ和Ｓ２ｄ因基因型不同而表现各异，收获指数受环境的影响大于籽粒产量和生物产量。在高中产环境中，收获指数等３个性状均好于低产环境。不同环境中，收获指数和生物产量都对籽粒产量有显著或极显著影响。收获指数、籽粒产量和生物产量的高低与其稳定性之间彼此独立。改良基因型的收获指数和生物产量对提高籽粒产量有显著的促进作用。

The stability of harvest index(HI),biomass (BI) and grain yield (GY) of 9 wheat genotypes were studied in 7 different ecologic locations in Sichuan Province.The results showed that there were significant interactions between these traits and locations.The stability parameters b and S 2d varied with genotypes,but the regression coefficents b of three traits of most genotypes were not significant different from 1.The variation of b and S 2d of HI was larger than those of GY and BI.HI,GY and BI performed better in middle-high yielding environments than in low-yielding environments.Both BI and yield index affected GY significantly in different environments.The performance of the three traits was not related to their stability parameters.This indicated that improving on HI and BI of genotypes could result in the-improvement of grain yield simultaneously.