Identifying wheat genomic regions for improving grain protein concentration independently of grain yield using multiple inter-related populations
Identifying wheat genomic regions for improving grain protein concentration independently of grain yield using multiple inter-related populations
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DOI：
10.1007/s11032-012-9817-5
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发表时间：
2013-03-01
影响因子：
3.1
通讯作者：
Le Gouis, Jacques
中科院分区：
文献类型：
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作者：
Bogard, Matthieu;Allard, Vincent;Le Gouis, Jacques
小麦籽粒产量（戈伊）和籽粒蛋白质浓度（GPC）是决定小麦经济价值的两个主要性状。因此，这些是小麦育种计划中的主要目标，但它们的同时改进受到GPC和戈伊之间的负相关性的阻碍。通过数量性状基因座（QTL）分析鉴定GPC和戈伊的遗传决定因素将是鉴定染色体区域的一种方式，允许使用标记辅助选择在不降低戈伊的情况下改进GPC。因此，使用在大型多环境试验网络中生长的三个互连的加倍单倍体群体对戈伊和GPC进行QTL检测。在2A、2D、3B、7 B和7 D染色体上，GPC和戈伊的QTL共定位，表现为拮抗效应，是GPC与戈伊负相关的主要原因。尽管如此，在3A和5D染色体上发现了在实验中独立于戈伊决定GPC的基因组区域，并且可以帮助育种者将GPC-戈伊关系向期望的方向移动。
Grain yield (GY) and grain protein concentration (GPC) are two major traits contributing to the economic value of the wheat crop. These are, consequently, major targets in wheat breeding programs, but their simultaneous improvement is hampered by the negative correlation between GPC and GY. Identifying the genetic determinants of GPC and GY through quantitative trait loci (QTL) analysis would be one way to identify chromosomal regions, allowing improvement of GPC without reducing GY using marker-assisted selection. Therefore, QTL detection was carried out for GY and GPC using three inter-connected doubled haploid populations grown in a large multi-environment trial network. Chromosomes 2A, 2D, 3B, 7B and 7D showed co-location of QTL for GPC and GY with antagonistic effects, thus contributing to the negative GPC-GY relationship. Nonetheless, genomic regions determining GPC independently of GY across experiments were found on chromosomes 3A and 5D and could help breeders to move the GPC-GY relationship in a desirable direction.