One hundred and ninety‐seven wheat accessions from Yellow and Huai Winter Wheat Region (YHW) were evaluated for differences of 14 agronomic traits under low‐ and high‐density plantings. Compared with the high‐density plantings, plant height, neck length, uppermost internode length, flag leaf angle and number of sterile spikelets under the low‐density plantings reduced, while heading date, flowering date, flag leaf length and width, spike length, number of fertile spikelets, grain number per spike, thousand‐kernel weight and grain weight per spike increased. A total of 1,118 markers were detected based on GWAS, and seven QTLs were confirmed. One QTL on chromosomes 5BL and two other QTLs on 5Dl were all tightly associated with flowering date difference. Bioinformatics analysis revealed that two haploblocks in 5Dl were involved, and the Vrn‐D1 locus was located in this interval. A region on chromosome 5B at around 531.5 Mb was significantly associated with plant height difference. Two QTLs including AX‐94840438 (7BL) and AX‐94563647 (7DS) were responsible for neck length or uppermost internode length difference.

中文翻译：

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基于660k SNP阵列的低密度和高密度种植模式下14个农艺性状差异的全基因组关联研究

在低密度和高密度种植下，对黄，淮冬小麦区（YHW）的197份小麦品种的14个农艺性状差异进行了评估。与高密度种植相比，低密度种植下的株高，颈部长度，最上节间长度，剑叶角度和无菌小穗数量减少，而抽穗期，开花日期，旗叶长度和宽度，穗长，可育小穗数量，每穗粒数，千粒重和每穗粒重增加。基于GWAS共检测到1,118个标记，并确认了七个QTL。染色体5BL上的一个QTL和5D1上的另外两个QTL都与开花日期差异紧密相关。生物信息学分析表明，涉及5D1中的两个单倍体，并且Vrn-D1基因座位于此间隔中。5B染色体上大约531.5 Mb的区域与植物高度差异显着相关。颈部长度或最高节点间长度差异包括两个QTL，包括AX-94840438（7BL）和AX-94563647（7DS）。