大穗小麦幼穗分化规律研究  

STUDY ON SPIKELET DIFFERENTIATION OF BIG SPIKE WHEAT VARIETIES

作　　者：庞红喜[1,2] 宋哲民[1,2] 

机构地区：[1]陕西省农业科学院小麦研究中心 [2]西北农业大学

出　　处：《河北农业技术师范学院学报》1997年第3期38-42,共5页

摘　　要：对目前具有代表性的大穗小麦品系幼穗分化进行了２年系统观察，结果表明：大穗小麦幼穗分化速度快，比对照品种提高１９．４６％和２２．８２％；单棱分化时期短，比对照品种少４２．５ｄ，降低４０．９６％；进入二棱期早且二棱期长，比对照品种早５０～８６ｄ，增加２５．７ｄ；护颖分化期和小花原基分化期比对照品种增长５．５ｄ和５．７ｄ，雌雄蕊原基分化期和药隔分化期差异不大。其中，幼穗分化速度快是决定大穗小麦具有较多小穗数的主要原因。Spikelet differentiation of typical big spike wheat varieties (lines) was observed systematically in two years,the result showed:Differentiation rate of big spike wheat was 19.46%～22.82% higher than that of ck;Duration of differentiation of single ridge of big spike wheat was 42.5 d shorter and 40.96% longer than that of ck;Duration of double ridge of big spike wheat was more early and 50～86 d longer than that of ck.Among them,higher differentiation rate was the major reason why there was more spikelets in big spike wheat varieties (lines).

关 键 词：小麦 大穗 幼穗分化 分化速度 分化规律 

分 类 号：S512.101[农业科学—作物学]