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通过对全基因组重测序数据分析发现120 122个高质量In Del和SNP变异位点,通过这些位点可以将具有不同遗传背景的285份玉米自交系划分为9大类群,包括黄淮海地区两大杂种优势群PA和SPT群。检测PA和SPT群间自交系基因型频率的分布和差异发现,1 251个杂种优势候选位点不均匀分布在玉米10条染色体上,其中,675个位点与42个已报道的杂种优势相关QTLs一致。基于候选位点,对部分黄淮海地区的主栽杂交品种进行杂合性分析,In Del和SNP结果均表明,这些位点的杂合性显著高于其他区域,研究结果验证了本研究获得的候选区域的可靠性,表明这些候选位点的杂合性已被广泛的运用于育种过程中。
Based on the genome-wide resequencing data analysis, 120 122 high quality In Del and SNP loci were found, and 285 maize inbred lines with different genetic backgrounds could be divided into 9 groups according to these loci, including Huanghuaihai region two Large heterosis cluster PA and SPT cluster. The distribution and difference of genotype frequency of inbred lines among PA and SPT populations revealed that 1 251 heterozygous candidate sites were unevenly distributed on 10 chromosomes of maize, among which, 675 sites and 42 reported heterosis Relevant QTLs are consistent. Based on the candidate sites, the heterozygosity analysis of main hybrids in some Huang-Huai-Hai regions showed that the heterozygosity of these loci was significantly higher than that of other regions. The results of In Del and SNP indicated that The reliability of the candidate regions indicates that the heterozygosity of these candidate sites has been widely used in the breeding process.