对冬季油菜基因重组情况的分析表明,母本与父本之间存在偏差。

IF 2.3 3区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Genome Pub Date : 2024-12-01 Epub Date: 2024-10-21 DOI:10.1139/gen-2023-0110
Nayyer Abdollahi Sisi, Eva Herzog, Amine Abbadi, Rod J Snowdon, Agnieszka A Golicz
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引用次数: 0

摘要

重组是同源染色体之间 DNA 的相互交换,是减数分裂过程中必不可少的步骤。同源染色体之间的交叉产生新的等位基因组合,维持遗传多样性。由于遗传、表观遗传和环境因素的影响,染色体上的重组情况具有高度异质性,而且在不同种群和性别之间也存在差异。在这里,我们利用从两个基因不同的创始群体中衍生出来的两个独特的多亲本群体,研究了模式全多倍体作物油菜(Brassica napus L.)19条染色体上的重组特征。两个群体分别采用完全平衡的配对链式杂交方案。使用 15K SNP 阵列对连续五代共 3213 个个体进行了基因分型。我们观察到染色体上的重组分布不均,在两个种群中,某些基因组区域的重组频率要高得多。在这两个群体中,母系重组事件比父系重组更频繁。这项研究对染色体水平的重组情况提供了独特的见解,并揭示了重组数量的母本-父本偏倚,对育种具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of the winter oilseed rape recombination landscape suggests maternal-paternal bias.

Recombination, the reciprocal exchange of DNA between homologous chromosomes, is a mandatory step necessary for meiosis progression. Crossovers between homologous chromosomes generate new combinations of alleles and maintain genetic diversity. Due to genetic, epigenetic, and environmental factors, the recombination landscape is highly heterogeneous along the chromosomes and it also differs between populations and between sexes. Here, we investigated recombination characteristics across the 19 chromosomes of the model allopolyploid crop species oilseed rape (Brassica napus L.), using two unique multiparental populations derived from two genetically divergent founder pools, each of which comprised 50 genetically diverse founder accessions. A fully balanced, pairwise chain-crossing scheme was utilized to create each of the two populations. A total of 3213 individuals, spanning five successive generations, were genotyped using a 15K SNP array. We observed uneven distribution of recombination along chromosomes, with some genomic regions undergoing substantially more frequent recombination in both populations. In both populations, maternal recombination events were more frequent than paternal recombination. This study provides unique insight into the recombination landscape at chromosomal level and reveals a maternal-paternal bias for recombination number with implications for breeding.

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来源期刊
Genome
Genome 生物-生物工程与应用微生物
CiteScore
5.30
自引率
3.20%
发文量
42
审稿时长
6-12 weeks
期刊介绍: Genome is a monthly journal, established in 1959, that publishes original research articles, reviews, mini-reviews, current opinions, and commentaries. Areas of interest include general genetics and genomics, cytogenetics, molecular and evolutionary genetics, developmental genetics, population genetics, phylogenomics, molecular identification, as well as emerging areas such as ecological, comparative, and functional genomics.
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