南充地区油菜新品种产量的稳定性初探

用Eberhart-Russell模式和方法分析南充地区1980～87年区域试验中六个油菜(B.napus L.)品种的丰产性和稳产性。结果表明;参试品种的两种产量稳定性参数值都有较大差异,说明品种在本地区有不同的稳产性和适应性而产量与两种稳定性参数之间并没有相关。有的品种表现高产、稳产和适应性广,而稳产性好的品种一般至少有两个产量构成因素表现稳定。这种分析方法可以作为研究油菜品种的稳产性和适应性的有价值的手段有助于对参试品种作出较全面的评价,以便合理的推广利用。

A PRELIMINARY STUDY ON YIELD STABILITY OF RAPE SEED NEW VARIETIES IN THE NANCHONG DISTRICT

The productivrty and yicld stability of six rape(Brasscia napus L.) varieties tested at seven sites in the 1986-87's Nanchong district sichuan Rape Regional Test were analysed with the Eberhart-Russell model. The esults of this study showed that these varieties differed considerably in values of both two parameters, responding to their yield stability and aaplability in this regional test. There was no correlation between the yields and stability parameters, and one of these varieties was found to be high yielding, stable and widely adapted. Besides, a cultivar with better yield stability should have at least two stable yield components. This method of analysis shoulldbe a valuable tool for breeders to use in studying rape varietal stability and adaptability over a range of rnviroments, The results of this method of analysis on the data from eniform refional test could be used as an additional criterion to evaluate comprehensively new varieties for recommendation.