氮素是作物生长发育的重要营养元素。植物高度相关性状可能受到氮补充的影响。在本研究中,我们基于低氮和正常(CK ) 治疗。GWAS分析结果显示,共检测到86个数量性状位点(QTL),其中株高13个,穗长QTL 10个,株顶第一节间长度QTL 19个,株高QTL 6个。第二节间长度、11个第三节间长度的QTL、13个第四节间长度的QTL和14个第五节间长度的QTL。与CK处理相比,株高,穗长、第四和第五节间长度受到低氮处理的显着影响。共检测到18个响应低氮水平的QTL,其中在3A、6A和6D染色体上检测到3个第四节间长度的QTL,在1A、1B、1D、2A、2B、3A上检测到第五节间长度的11个QTL , 3B, 4A, 5B 和 7B 染色体,3A 染色体上有一个穗长 QTL,5B 染色体上有一个株高 QTL。这些 QTL 将增强我们对植物高度对氮缺乏反应的遗传基础的理解,并将有利于氮肥的遗传反应。包括在 3A、6A 和 6D 染色体上检测到的第 4 个节间长度的 3 个 QTL,在 1A、1B、1D、2A、2B、3A、3B、4A、5B 和 7B 染色体上检测到的第 5 个节间长度的 11 个 QTL,1 个 QTL 3A染色体上的穗长,5B染色体上的株高1个QTL。这些 QTL 将增强我们对植物高度对氮缺乏反应的遗传基础的理解,并将有利于氮肥的遗传反应。包括在 3A、6A 和 6D 染色体上检测到的第 4 个节间长度的 3 个 QTL,在 1A、1B、1D、2A、2B、3A、3B、4A、5B 和 7B 染色体上检测到的第 5 个节间长度的 11 个 QTL,1 个 QTL 3A染色体上的穗长,5B染色体上的株高1个QTL。这些 QTL 将增强我们对植物高度对氮缺乏反应的遗传基础的理解,并将有利于氮肥的遗传反应。
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Genome-wide association study identified novel genetic loci controlling internode lengths and plant height in common wheat under different nitrogen treatments
Nitrogen is an important nutrient for crop growth and development. Plant height-related traits can be affected by nitrogen supplementation. In this study, we performed a genome-wide association study (GWAS) on plant height, spike length, length of different internodes, and lodging resistance strength at the grain-filling stage based on wheat local varieties subjected to low nitrogen and normal (CK) treatments. GWAS analysis showed that a total of 86 quantitative trait locus (QTLs) were detected, including 13 QTLs for plant height, 10 QTLs for spike length, 19 QTLs for the length of the first internode from the top of the plant, 6 QTLs for the second internode length, 11 QTLs for the third internode length, 13 QTLs for the fourth internode length, and 14 QTLs for the fifth internode length. Compared to the CK treatment, the plant height, spike length, and fourth and fifth internode lengths were significantly affected by the low nitrogen treatment. A total of 18 QTLs responding to low nitrogen level were detected, including three QTLs for the fourth internode length detected on 3A, 6A, and 6D chromosomes, eleven QTLs for the fifth internode length on 1A, 1B, 1D, 2A, 2B, 3A, 3B, 4A, 5B and 7B chromosomes, one QTL for spike length on 3A chromosome, and one QTL for plant height on 5B chromosome. These QTLs will enhance our understanding of the genetic basis of plant height responses to nitrogen deficiency and will benefit genetic reactions to nitrogen fertilization.