Global selection on sucrose synthase haplotypes during a century wheat breeding

来源 :第四届全国小麦基因组学及分子育种大会 | 被引量 : 0次 | 上传用户:xin22431
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Spike number per unit area, number of grains per spike and thousand kemel weight (TKW) are important yield components.In China increases in wheat yields are mainly due to increases in grain number and thousand kemel weight.Thousand kemel weight mainly depends on starch content as starch accounts for about 70% of the grain endosperm.
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Flour falling number (FN) is an important trait because of not only relating with pre-harvest sprouting (PHS) tolerance but processing quality.Waxy wheat usually has low flour falling number (FN) with
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小麦穗部性状是与产量关系密切的重要农艺性状.本研究以Batavia和Erine为亲本构建的DH群体为材料,利用SSR标记和DArT标记对穗长进行数量性状进行QTL分析.构建的遗传连锁图谱由77个SSR标记和711个DArT标记组成,图谱全长1813.3 cM,标记间的平均遗传距离为2.301 cM.
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小麦穗发芽是世界性灾害,尤以白皮小麦产区受灾频繁和严重.本研究以来自46个国家的347份白皮小麦为研究对象,进行了两年(2010-2011、2011-2012)四点(温江、崇州、雅安、都江堰)穗发芽鉴定.
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节节麦作为改良普通小麦的重要材料被广泛利用,其中具有的强休眠材料为小麦穗发芽抗性育种提供了大量基因资源.利用强休眠节节麦AS60,通过人工合成获得了六倍体小麦SHW-L1,利用四川地区推广品种川麦32与其杂交构建了重组自交系(F10)并获得高密度DArT图谱.
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小麦穗发芽(Pre-harvest sprouting,PHS)是指收获前遇到阴雨或在潮湿环境下籽粒在穗上发芽的现象.穗发芽是一种世界性的重要灾害,主要发生在收获季节易降雨的地区.我国受穗发芽危害的麦区约占全国小麦总面积的83%.穗发芽不仅降低产量而且严重劣化品质和种用价值.
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