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Delineation of loci governing an extra-earliness trait in lentil (Lens culinaris Medik.) using the QTL-Seq approach
Plant Biotechnology Journal ( IF 10.1 ) Pub Date : 2024-06-25 , DOI: 10.1111/pbi.14415
Kumbarahally Murthigowda Shivaprasad 1, 2 , Harsh K Dikshit 1 , Gyan Prakash Mishra 1 , Subodh Kumar Sinha 3 , Muraleedhar Aski 1 , Manju Kohli 1 , Dwijesh C Mishra 4 , Amit Kumar Singh 5 , Soma Gupta 1 , Akanksha Singh 6 , Kuldeep Tripathi 7 , Ranjeet Ranjan Kumar 8 , Atul Kumar 9 , Girish Kumar Jha 4 , Shiv Kumar 6 , Rajeev K Varshney 10
Affiliation  

Developing early maturing lentil has the potential to minimize yield losses, mainly during terminal drought. Whole-genome resequencing (WGRS) based QTL-seq identified the loci governing earliness in lentil. The genetic analysis for maturity duration provided a good fit to 3:1 segregation (F2), indicating earliness as a recessive trait. WGRS of Globe Mutant (late parent), late-flowering, and early-flowering bulks (from RILs) has generated 1124.57, 1052.24 million raw and clean reads, respectively. The QTL-Seq identified three QTLs (LcqDTF3.1, LcqDTF3.2, and LcqDTF3.3) on chromosome 3 having 246244 SNPs and 15577 insertions/deletions (InDels) and 13 flowering pathway genes. Of these, 11 exhibited sequence variations between bulks and validation (qPCR) revealed a significant difference in the expression of nine candidate genes (LcGA20oxG, LcFRI, LcLFY, LcSPL13a, Lcu.2RBY.3g060720, Lcu.2RBY.3g062540, Lcu.2RBY.3g062760, LcELF3a, and LcEMF1). Interestingly, the LcELF3a gene showed significantly higher expression in late-flowering genotype and exhibited substantial involvement in promoting lateness. Subsequently, an InDel marker (I-SP-383.9; LcELF3a gene) developed from LcqDTF3.2 QTL region showed 82.35% PVE (phenotypic variation explained) for earliness. The cloning, sequencing, and comparative analysis of the LcELF3a gene from both parents revealed 23 SNPs and InDels. Interestingly, a 52 bp deletion was recorded in the LcELF3a gene of L4775, predicted to cause premature termination of protein synthesis after 4 missense amino acids beyond the 351st amino acid due to the frameshift during translation. The identified InDel marker holds significant potential for breeding early maturing lentil varieties.

中文翻译:


使用 QTL-Seq 方法描绘控制扁豆 (Lens culinaris Medik.) 中 extra-earliness 性状的基因座



培育早熟扁豆有可能最大限度地减少产量损失,主要是在末期干旱期间。基于全基因组重测序 (WGRS) 的 QTL-seq 确定了控制扁豆早熟性的位点。成熟持续时间的遗传分析与 3:1 分离 (F2) 拟合良好,表明早熟是一种隐性状。Globe Mutant(晚亲本)、晚开花和早开花批量(来自 RILs)的 WGRS 分别产生了 1124.57、10.5224 亿个原始和干净读数。QTL-Seq 鉴定出 3 个 QTL (LcqDTF3.1LcqDTF32LcqDTF3 的 Lic.3) 在 3 号染色体上具有 246244 个 SNP 和 15577 个插入/缺失 (InDels) 和 13 个开花途径基因。其中,11 个表现出批量之间的序列变异,验证 (qPCR) 显示 9 个候选基因 (LcGA20oxGLcFRILcLFYLcSPL13aLcu.2RBY的。3g060720,Lcu2RBY的。3g062540,Lcu. 2RBY的。3g062760LcELF3aLcEMF1)。有趣的是,LcELF3a 基因在晚开花基因型中表现出显著较高的表达,并表现出在促进晚熟方面的实质性参与。随后,InDel 标记 (I-SP-383.9;LcELF3a 基因)从 LcqDTF3 发展而来。2 QTL 区域显示 82.35% PVE (表型变异解释) 为早熟性。对来自亲本的 LcELF3a 基因进行克隆、测序和比较分析,发现 23 个 SNP 和 InDel。 有趣的是,在 L4775 的 LcELF3a 基因中记录了 52 bp 的缺失,由于翻译过程中的移码,预计在超过 351 个氨基酸的 4 个错义氨基酸后会导致蛋白质合成过早终止。鉴定的 InDel 标记具有培育早熟扁豆品种的巨大潜力。
更新日期:2024-06-25
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