摘要
对宁波地区汕优63杂交水稻的产种群体、恢复系和保持系的结实和穗芽发生进行了群体性状比较.同时,将小穗的胚或胚乳置于不同的干湿条件下进行发芽试验.结果表明:穗芽发生既有遗传原因,又有环境原因;穗芽发生多在中、上部枝梗,在同一枝梗中多在中、上部小穗,穗芽发生与小穗下垂程度有关.在选育新品种时,选枝梗和小枝梗挺拔的性状,可减少穗芽的发生.再是,3种群体的枝梗数大致相似,结实高峰部位也相似.因此,抓住结实高峰部位开花的有利时机,对不育系进行辅助授粉,有利提高结实率.
Pre-harvest sprouting is due to both heredity and environment.Therefore,genetic selectionof the moisture-resistant strain is important for preventing pre-harvest sprouting.Most germinated grainsappear in the middle or upper branch of spike.In the same branch germinated grains emerge in the mediumor upper section.The occurrence of germinated grains is related to the extent to which the branch of spikelethangs down.In strain selection it is desirable to choose the one which is strong enough to erect,so as to re-duce germinated grains.Setting percentage and output of hybird seed production is much lower than those ofmaintainer liner or restores liner.Given sufficient pollen and frequent pollination,perhaps setting percen-tage may be increased.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1992年第3期24-27,共4页
Journal of Nanjing Agricultural University
关键词
水稻
杂交
制种
穗芽
Ningbo region
rice(Oryza satiya L.)
hybrid seed production
population
setting pcrcentage pre-harvest sprouting
