【摘 要】
：
以O_2基因为遗传背景的高级氨酸玉米(简称O_2玉米)比普通玉米同型种一般产量低7—15%,这是粉质胚乳导致子粒容重降低的结果.育种上解决的途径是利用硬胚乳修饰基因选育子粒容
【机 构】
：
山西省农业科学院作物遗传研究所,山西省农业科学院作物遗传研究所 太原,太原
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以O_2基因为遗传背景的高级氨酸玉米(简称O_2玉米)比普通玉米同型种一般产量低7—15%,这是粉质胚乳导致子粒容重降低的结果.育种上解决的途径是利用硬胚乳修饰基因选育子粒容重较高的硬胚乳或半硬胚乳O_2自交系.不同类型玉米携带的硬胚乳修饰基因贫富悬殊很大,只有筛选利用较丰富的亲本材料,通过自交或自交与姊妹交相结合的二环系选育方法,以早代子粒出现“角帽”和“角圈’为选择目标,才能有效地育成硬胚乳或半硬胚乳O_2玉米交系.
Higher-grade sour corn (O_2 maize) with O_2 genetic background is 7-15% lower than normal maize isoforms, which is the result of decrease in bulk density of silty endosperm.The breeding method is to use hard endosperm The modified gene was used to breed hard endosperm or semi-hard endosperm O_2 inbred lines with high bulk density.The hard endosperm modified genes carried by different types of maize had great disparity between rich and poor, only the screening and utilization of more abundant parental material, by selfing or selfing In the breeding method of ring system with sibling, the selection of “angle hat” and “angle ring” appeared in the earlier grain, which could be used to breed hard endosperm or semi - hard endosperm O_2 maize.
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