两系亚种间杂交水稻抽穗期与结实率的关系(简报)  

THE RELATION BETWEEN THE HEADING PERIOD AND SEED-SETTING RATE IN INTERSUBSPECIFIC HYBRID RICE

作　　者：贺浩华[1] 刘宜柏[1] 饶治祥 潘晓云 

机构地区：[1]江西农业大学作物育种研究室

出　　处：《江西农业大学学报》1993年第A01期83-86,共4页Acta Agriculturae Universitatis Jiangxiensis

摘　　要：本文初步探讨了亚种间杂交稻抽穗期与结实率的关系.结果表明,亚种间杂交稻不同抽穗期的千粒重和结实率的变异幅度大于品种间杂交稻.即亚种间组合千粒重和结实率受气候条件的影响比品种间组合要大.不论品种间组合,还是亚种间组合二次枝梗的千粒重和结实率的变异幅度大于一次枝梗的千粒重和结实率.两类杂交组合的结实率都随气温的升高而降低,但是亚种间组合比品种间组合暗期更耐高温.The relation between the heading period and seed-setting rate in intersubspecific hy-brid rice were studied.The variation scope of 1000-grain weight and seed-setting rate inintersubspecific hybrid combination was more larger than that of interspecific hybrid com-bination in different heading period,i.e.the effects of 1000-grain weight and seed-settingrate by climatic conditions in intersubspecific hybrid combination were more heavy thanthat of interspecific hybrid combination.Not only intersubspecific hybrid combination,Butalso interspecific hybrid combination,the variation coeffients of 1000-grain weight andseed-setting rate in secondary branches is more larger than that of first branches. The high-er temperature is,the lower seed-setting rate in hybrid rice is.The ability of high-tempera-ture-resisting in night period in the intersubspecific hybrid rice was stronger than that ofinterspecific hybrid rice.

关 键 词：亚种间 杂交稻 结实率 抽穗期 

分 类 号：S511.103.2[农业科学—作物学]