摘要
两年分期播种试验结果表明,自然温光条件对小麦幼穗发育进程的影响主要表现在扩颖原基分化以前的阶段.从种子萌发至生长锥伸长至单棱出现要求较宽范围的中低温诱导,单棱至二棱要求某种低温诱导,二棱至护颖原基出现要求一定的日长和温度诱导.品种间随冬性增强,对温度要求更为严格,对日长反应更为敏感,各阶段经历的天数相应延长.能进入护颖分化的播期均能正常抽穗,迟播因温度条件不能满足而穗分化滞留在单棱、二棱或初生阶段.
The result of different sowing date experiment for two years showed that the effect of naturaltemperature and daylength on the young ear development of wheat was found primarily before glumeprimordium appearance.The phase from the germination of seed to single ridge initiation is induced by givenlow-medium temperature.The single ridge phase is induced by low temperature.The appearance anddifferentiation of double ridge is induced by both given daylength and temperature.Among various varietiesthe stronger the winterness is,the more strict the requirement of temperature and daylength are,the longerthe passage days of every phase are.If the plants can differentiate glume primordium,they will head normal-ly.When the temperature and the daylength can not satisfy the need of plants,the differentiation of ear willbe detained at single ridge or double ridge,or primary phase.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1992年第4期19-25,共7页
Journal of Nanjing Agricultural University
基金
<全国小麦生态研究>课题
关键词
小麦
幼穗分化
温光诱导
wheat
induction of temperature and daylength
differentiation of young car
