Dissection of Recombination Attributes for Multiple Maize Populations Using a Common SNP Assay
文献类型: 外文期刊
作者: Guan, Haiying 1 ; Ali, Farhan 4 ; Pan, Qingchun 5 ;
作者机构: 1.Shandong Acad Agr Sci, Maize Res Inst, Jinan, Shandong, Peoples R China
2.Natl Engn Lab Wheat & Maize, Jinan, Shandong, Peoples R China
3.Minist Agr, Key Lab Biol & Genet Improvement Maize Northern Y, Jinan, Shandong, Peoples R China
4.Cereal Crops Res Inst, Nowshera, Pakistan
5.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan, Hubei, Peoples R China
关键词: maize;SNP;recombination event;recombination bin;recombination frequency
期刊名称:FRONTIERS IN PLANT SCIENCE ( 影响因子:5.753; 五年影响因子:6.612 )
ISSN: 1664-462X
年卷期: 2017 年 8 卷
页码:
收录情况: SCI
摘要: Recombination is a vital characteristic for quantitative trait loci mapping and breeding to enhance the yield potential of maize. However, recombination characteristics in globally used segregating populations have never been evaluated at similar genetic marker densities. This study aimed to divulge the characteristics of recombination events, recombinant chromosomal segments, and recombination frequency for four dissimilar populations. These populations were doubled haploid (DH), recombination inbred line (RIL), intermated B73xMo17 (IBM), and multi-parent advanced generation inter-cross (MAGIC), using the Illumina MaizeSNP50 BeadChip to provide markers. Our results revealed that the average number of recombination events was 16, 41, 72, and 86 per line in DH, RIL, IBM, and MAGIC populations, respectively. Accordingly, the average length of recombinant chromosomal segments was 84.8, 47.3, 29.2, and 20.4 Mb in DH, RIL, IBM, and MAGIC populations, respectively. Furtherly, the recombination frequency varied in different genomic regions and population types [DH (0-12.7 cM/Mb), RIL (0-15.5 cM/Mb), IBM (0-24.1 cM/Mb), MAGIC (0-42.3 cM/Mb)]. Utilizing different sub-sets of lines, the recombination bin number and size were analyzed in each population. Additionally, different sub-sets of markers and lines were employed to estimate the recombination bin number and size via formulas for relationship in these populations. The relationship between recombination events and recombination bin length was also examined. Our results contribute to determining the most suitable number of genetic markers, lines in each population, and population type for successful mapping and breeding.
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