Mapping quantitative trait loci controlling agronomic traits in the spring wheat cross RL4452 x 'AC Domain'
Mapping quantitative trait loci controlling agronomic traits in the spring wheat cross RL4452 x 'AC Domain'
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DOI：
10.1139/g05-055
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发表时间：
2005-10-01
期刊：
影响因子：
3.1
通讯作者：
McCallum, BD
中科院分区：
文献类型：
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作者：
McCartney, CA;Somers, DJ;McCallum, BD
小麦农艺性状的遗传控制研究相对较少。与遵循孟德尔分离模式的性状相比。从杂交RL 4452 דAC结构域”产生双单倍体群体以研究农艺性状的遗传：株高、成熟时间、倒伏、籽粒产量、测试重量和1000粒重。这个交叉包括2个加拿大西部小麦营销类的遗传学。复合区间作图进行了微卫星连锁图谱，将369个位点，和表型数据从多个马尼托巴环境。株高数量性状基因座（QHt.crc-4 B和QHt.crc-4D）定位于Rht-B1和Rht-D1的预期位置。这些QTL对株高的大部分变异负责，并与其他农艺性状相关。在RL 4452 x“AC结构域”群体中检测到另外25个农艺QTL，超出与QHt.crc-4 B和QHt.crc4D相关的QTL。“AC结构域”对早熟性有4个等位基因贡献，其中7 D上有一个主要的早熟性QTL。RL 4452在QY1d.crc-2B和QY1d.crc-4A上贡献了2个增产的主效等位基因，这2个等位基因是标记辅助选择的潜在目标。在3B上检测到一个关键的容重QTL，在3D和4A上检测到显著的千粒重QTL。
Relatively little is known about the genetic control of agronomic traits in common wheat (Triticum aestivum L.) compared with traits that follow Mendelian segregation patterns. A doubled-haploid population was generated from the cross RL4452 x 'AC Domain' to study the inheritance of the agronomic traits: plant height, time to maturity, lodging, grain yield, test weight, and 1000-grain weight. This cross includes the genetics of 2 western Canadian wheat marketing classes. Composite interval mapping was conducted with a microsatellite linkage map, incorporating 369 loci, and phenotypic data from multiple Manitoba environments. The plant height quantitative trait loci (QTLs), QHt.crc-4B and QHt.crc-4D, mapped to the expected locations of Rht-B1 and Rht-D1. These QTLs were responsible for most of the variation in plant height and were associated with other agronomic traits. An additional 25 agronomic QTLs were detected in the RL4452 x 'AC Domain' population beyond those associated with QHt.crc-4B and QHt.crc4D. 'AC Domain' contributed 4 alleles for early maturity, including a major time to maturity QTL on 7D. RL4452 contributed 2 major alleles for increased grain yield at QY1d.crc-2B and QY1d.crc-4A, which are potential targets for marker-assisted selection. A key test weight QTL was detected on 3B and prominent 1000-grain weight QTLs were identified on 3D and 4A.