IIIVmrMLM 为了解鹰嘴豆农艺性状变异的遗传基础提供了新见解

Agronomy Pub Date : 2024-08-12 DOI:10.3390/agronomy14081762
Maria Duk, Alexander Kanapin, Ekaterina Orlova, Maria Samsonova
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引用次数: 0

摘要

鹰嘴豆是世界上许多国家的主食作物。模拟基因型与环境的相互作用以及评估基因型贡献适应性等位基因的能力对于鹰嘴豆育种至关重要。在这项研究中,我们评估了 N.I. Vavilov 全俄植物遗传资源研究所收集的 159 个加入品系的 12 个重要农艺性状。其中包括 2016 年和 2022 年在库班(北纬 45°18′,东经 40°52′)以及 2022 年在阿斯特拉罕(北纬 46°06′,东经 48°04′)不同气候条件下种植的 145 个陆地品种和 13 个栽培品种。利用多环境模式下的 IIIVmrMLM 模型,我们确定了 161 个在不同环境中具有稳定遗传效应的数量性状核苷酸(QTN)。此外,我们还观察到 254 个 QTN 与环境的相互作用,这些相互作用具有明显的环境特异性效应。值得注意的是,这些相互作用中有五个表现出较大的效应,R2 值超过 10%,而稳定 QTN 的最高 R2 值为 4.7%。在蛋白质编码基因及其 1 Kb 侧翼区域内,我们发现了 22 个 QTN 和 45 个 QTN 与环境的相互作用,很可能标记了候选的因果基因。从全俄罗斯植物遗传资源研究所(N.I Vavilov All Russian Institute for Plant Genetic Resources)收集的陆稻品种在数量性状核苷酸位点上表现出许多有利的等位基因,在库班和阿斯特拉罕地区显示出稳定的效应。此外,与阿斯特拉罕特异性等位基因相比,它们在 QTN 与环境相互作用位点上拥有更多的库班特异性有利等位基因。在 QTN-环境互作位点上发现的环境特异性等位基因有可能增强鹰嘴豆对特定气候条件的适应性。
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IIIVmrMLM Provides New Insights into the Genetic Basis of the Agronomic Trait Variation in Chickpea
Chickpea is a staple crop for many nations worldwide. Modeling genotype-by-environment interactions and assessing the genotype’s ability to contribute adaptive alleles are crucial for chickpea breeding. In this study, we evaluated 12 agronomically important traits of 159 accessions from the N.I. Vavilov All Russian Institute for Plant Genetic Resources collection. These included 145 landraces and 13 cultivars grown in different climatic conditions in Kuban (45°18′ N and 40°52′ E) in both 2016 and 2022, as well as in Astrakhan (46°06′ N and 48°04′ E) in 2022. Using the IIIVmrMLM model in multi-environmental mode, we identified 161 quantitative trait nucleotides (QTNs) with stable genetic effects across different environments. Furthermore, we have observed 254 QTN-by-environment interactions with distinct environment-specific effects. Notably, five of these interactions manifested large effects, with R2 values exceeding 10%, while the highest R2 value for stable QTNs was 4.7%. Within the protein-coding genes and their 1 Kb flanking regions, we have discerned 22 QTNs and 45 QTN-by-environment interactions, most likely tagging the candidate causal genes. The landraces obtained from the N.I Vavilov All Russian Institute for Plant Genetic Resources collection exhibit numerous favorable alleles at quantitative trait nucleotide loci, showing stable effects in the Kuban and Astrakhan regions. Additionally, they possessed a significantly higher number of Kuban-specific favorable alleles of the QTN-by-environment interaction loci compared to the Astrakhan-specific ones. The environment-specific alleles found at the QTN-by-environment interaction loci have the potential to enhance chickpea adaptation to specific climatic conditions.
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