不同生态区裸燕麦产量构成因素分析

Analyses of Naked Oat Yield Components in Different Ecological Regions

按照四种不同生态类型区分析了1989～1991年度全国旱地裸燕麦(Avena nuda L.)区试3年9点试验数据,结果表明,由多个基因型构成一个群体在各生态区的生育表现、穗粒性状与产量的关系有显著的差异,着眼于高产裸燕麦育种目标,夏裸燕麦区以大穗大粒型品种为突破口;二秋裸燕麦区则应主攻大穗;秋裸燕麦区提高产量要在均衡发展的前提下提高亩穗数,实现重穗型;冬裸燕麦区则应保持大穗,增加穗粒重.

Naked oat (Avena nuda L. ) was experimentaly planted in nine drought land plots located in four different ecological regions in the whole country during 1989-1991, and the experimental data were analysed. The results showed that the population composed of several genotypes greatly differed in the relationship between the growth performance, the spike characters and the yield in all ecological regions. In order to develop high-yield varieties of naked oat in summer naked oat regions the stress was put on breeding the varieties with large spike and large kernel; in early autumn naked oat regions the objective was taken at cultivating the varieties with large spike; in autumn naked oat regions the oat yield could be raised only by increasing the spike number per unit area under the prerequisite of balanced development of all characters; in winter naked oat regions it was a principle to bread the varieties with large spike.