高粱-旱稻属间杂交获得矮秆新种质的矮生性状分析  

ANALYSIS OF DWARF CHARACTER OF NEW SHORT-STALK GERMPLASM DERIVED FROM A GENERIC HYBRIDIZATION BETWEEN SORGHUM AND UPLAND RICE

作　　者：李慧敏[1] 赵凤梧[1] 李爱国[1] 彭海城[1] 杨建忠[1] 李明哲[1] 郝永波[1] 

机构地区：[1]河北省农林科学院旱作农业研究所,河北衡水053000

出　　处：《核农学报》2009年第1期33-36,共4页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金项目(30471058);河北省自然科学基金(C2007000977)项目

摘　　要：以高梁基因型沈农133（Sorghum bicolor）为母本，旱稻基因型旱65（Oryza sativa）为父本，进行了9代属间杂交、回交及自交后代选择，获得了5个株高达82．7～143．5cm的矮生新种质，暂定名为矮101、矮102、矮103、矮104及矮105。新种质株高同母本（163．1cm）相比降低了80．4—19．6cm，降低范围为49．29％～12．02％。株高降低的主要原因是植株茎秆节间数目发生变化，新种质茎秆节间数为8～13节，较母本的17节减少4～9节，降低范围为23．53％～52．94％。猜测与一种新的矮秆基因——茎秆节间数目减少基因有关，该基因参与植株发育过程并控制植株高度。5 new short-stalk sorghum germplasm called Ai 101, Ai 102, Ai 103, Ai 104 and Ai 105 with plant height of 82.7 143.5cm were developed from a generic hybridization between shennong 133, a sorghum （S. bicolor） as female and Han 65, an upland rice （ O. sativa ） as male and backcross parent through 9 generation selections. The plant height was reduced 80.4 - 19.6cm, or 49.29% - 12.02% comparing with its female parent of 163. lcm height. Typical variation of this dwarf character was the number of internodes decreasing caused the plant height reduction in the new dwarf germplasm. It is assumed that a new kind of dwarf gene（s） was involved in the process of plant development and controlling the plant height.

关 键 词：高梁 旱稻 属间杂交 株高 矮生性状 茎节数目 

分 类 号：S514[农业科学—作物学] S511.6