Relationship between QTL for grain shape, grain weight, test weight, milling yield, and plant height in the spring wheat cross RL4452/'AC Domain'.
Relationship between QTL for grain shape, grain weight, test weight, milling yield, and plant height in the spring wheat cross RL4452/'AC Domain'.
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QTL的晶粒形状，晶粒重量，测试重量，铣削产量和植物高度在弹簧麦交叉RL44452/'交流域之间的关系。
DOI：
10.1371/journal.pone.0190681
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
McCartney CA
中科院分区：
文献类型：
--
作者：
Cabral AL;Jordan MC;Larson G;Somers DJ;Humphreys DG;McCartney CA
小麦籽粒形态特征具有复杂性和数量遗传性。以RL4452/‘AC区’杂交组合的加倍单倍体群体为材料，研究了籽粒形状的遗传基础。利用1999-2004年间在加拿大马尼托巴省Glenlea、Brandon和Moden试验点的数据，对总共18个性状进行了QTL分析：14个粒形性状、面粉产量(Fyd)和3个农艺性状(株高[Plht]、千粒重[Gwt]、容重[Twt])。用Acurum®颗粒分析仪通过数字图像分析研究了籽粒形状。Plht、Gwt、Twt、Fyd和粒形QTL相互关联，QTL分析表明，这些性状的QTL往往定位在相同的遗传位置。粒形性状最显著的QTL位于4B和4D染色体上，分别占表型变异的24.4%和53.3%。此外，在4D染色体上的Rht-D1位点上检测到了对Plht、Gwt和Twt的最显著的QTL。与Rht-D1a等位基因相比，Rht-D1b降低了Plht、GWT、Twt和籽粒宽度。4B染色体上的一个狭窄的遗传区间包含显著的粒形、GWT和Plht QTL。‘AC结构域’等位基因降低了Plht、GWT、籽粒长宽性状，但对Twt无明显影响。结果表明，该变异与Rht-B1的分离不一致。在这个群体中发现了许多控制这些性状的QTL。
Kernel morphology characteristics of wheat are complex and quantitatively inherited. A doubled haploid (DH) population of the cross RL4452/‘AC Domain’ was used to study the genetic basis of seed shape. Quantitative trait loci (QTL) analyses were conducted on a total of 18 traits: 14 grain shape traits, flour yield (Fyd), and three agronomic traits (Plant height [Plht], 1000 Grain weight [Gwt], Test weight [Twt]), using data from trial locations at Glenlea, Brandon, and Morden in Manitoba, Canada, between 1999 and 2004. Kernel shape was studied through digital image analysis with an Acurum® grain analyzer. Plht, Gwt, Twt, Fyd, and grain shape QTL were correlated with each other and QTL analysis revealed that QTL for these traits often mapped to the same genetic locations. The most significant QTL for the grain shape traits were located on chromosomes 4B and 4D, each accounting for up to 24.4% and 53.3% of the total phenotypic variation, respectively. In addition, the most significant QTL for Plht, Gwt, and Twt were all detected on chromosome 4D at the Rht-D1 locus. Rht-D1b decreased Plht, Gwt, Twt, and kernel width relative to the Rht-D1a allele. A narrow genetic interval on chromosome 4B contained significant QTL for grain shape, Gwt, and Plht. The ‘AC Domain’ allele reduced Plht, Gwt, kernel length and width traits, but had no detectable effect on Twt. The data indicated that this variation was inconsistent with segregation at Rht-B1. Numerous QTL were identified that control these traits in this population.
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