Genome-wide atlas of loci involved in chromosomal recombination in common wheat

被引：0

作者：

Peng, Yanchun ^{[1
,2
]}

Lyu, Xinru ^{[3
]}

Xu, Dengan ^{[3
]}

Wang, Zunjie ^{[4
]}

Xia, Xianchun ^{[5
]}

Hao, Yuanfeng ^{[5
]}

Wu, Hongya ^{[4
]}

Ma, Wujun ^{[3
,6
]}

机构：

[1] Hubei Acad Agr Sci, Inst Food Crops, Hubei Key Lab Food Crop Germplasm & Genet Improvem, Key Lab Crop Mol Breeding,Minist Agr & Rural Affai, Wuhan 430064, Peoples R China

[2] Anhui Prov Key Lab Crop Qual Improvement, Hefei 230031, Peoples R China

[3] Qingdao Agr Univ, Coll Agron, Qingdao 266109, Peoples R China

[4] Lixiahe Inst Agr Sci, Minist Agr & Rural Affairs, Key Lab Wheat Biol & Genet Improvement Low & Middl, Yangzhou 225007, Peoples R China

[5] Chinese Acad Agr Sci, Inst Crop Sci, State Key Lab Crop Gene Resources & Breeding, Beijing 100081, Peoples R China

[6] Murdoch Univ, Food Futures Inst, Coll Sci Hlth Engn & Educ, Perth 6150, Australia

来源：

BMC PLANT BIOLOGY | 2024年 / 24卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Wheat; Chromosomal recombination; QTL; Recombination hotspot; HOMOLOGOUS RECOMBINATION; FREQUENCY; MAIZE;

D O I：

10.1186/s12870-024-05800-3

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Chromosomal recombination is a pivotal biological mechanism for generating novel genetic diversity, essential for plant breeding and genetic research endeavors. This study investigated the genetic loci involved in chromosomal recombination through analyzing five published recombinant inbred line (RIL) populations and four double haploid (DH) populations. Great phenotypic variations in recombination frequency were observed between populations and chromosomes. A total of 29 QTL were mapped, which were predominantly located on the B genome. Notably, one QTL on chromosome 6AL was identified from two RIL populations and one QTL on chromosome 3B was identified in both RIL and DH populations. Additionally, a map delineating recombination hotspot regions was developed, and these regions were observed on all chromosomes except for 6B. Recombination hotspot regions tended to locate on chromosomes 1D, 3A, 3B, 6A, and 7D compared to chromosomes 1B, 5B, and 6B. In addition, most hotspot regions were located at chromosome termini, with some clustering in specific regions. Besides genetic factors, the study also explored the impact of chip size and population type on the number of identifiable chromosomal recombination events. Overall, this work improves our understanding of the molecular mechanisms for the chromosomal recombination rate and may contribute to the optimization of breeding strategies in wheat.

引用

页数：10

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