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作 者 ：田笑明

期 刊 ：作物学报 1991年 17卷 04期 页码：297-303

关键词：冬小麦；品种更替；育种目标；

Keywords:Winter wheat, Alternation of cultivars, Breeding objective,

摘 要 ：Abstract:The changing trends of the agronomic characters of thirtytwo winter wheat cultivars developed in four different periods(1950s,1960s,1970s,1980s)were studied in 1985 and 1987. The results indicated that the plant height significantly decreased;kernels per spike,kernel weight per spike,harvest index a

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