鉴定非巴斯马蒂籼稻中抗巴卡奈病的新型 QTL

IF 1.6 4区 农林科学 Q2 AGRONOMY Cereal Research Communications Pub Date : 2024-08-21 DOI:10.1007/s42976-024-00565-9
Malabika Khan, S. Raghu, Rameswar Prasad Sah, T. P. Muhammed Azharudheen, Debashis Moharana, Sasmita Behera, P. Soumya Mohanty, B. Jeevan, Lambodar Behera, B.C. Marndi, Sanghamitra Samantaray, C. Anilkumar
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摘要

由于气候变化,非巴斯马蒂籼稻的巴卡奈病害正成为一个主要威胁。我们的目标是在 Thavalakannan 中鉴定出抗白叶枯病的数量性状位点(QTL)/基因。我们在抗病品种 Thavalakannan 和易感品种 Pooja 之间建立了一个双亲种群,以确定 bakanae 病害抗性的 QTL。在三个不同的实验中,该群体受到了高致病力的 Fusarium fujikuroi 病原体 Gerua F3 菌株的挑战。利用三次实验计算的发病率百分比和群体的基因型信息来鉴定 QTL。在 5 号染色体上确定了一个主效应 QTL,其表型变异解释率为 8.97%。在主效应 QTL 的区间内,确定了控制赤霉素生物合成途径的基因,表明所确定的 QTL 具有重要意义。此外,在不同的染色体上还发现了 7 个有利于抗性的双 QTL 相互作用。主效应 QTL 可用于标记辅助引种育种,交互 QTL 可用于基因组选择以提高抗病性。
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Identification of novel QTL for bakanae disease resistance in non-basmati indica rice

Bakanae disease in non-basmati indica rice is emerging as a major threat owing to climate change. Our objective was to identify quantitative trait loci (QTL)/gene(s) in Thavalakannan, responsible for bakanae disease resistance. A bi-parental population was developed between a resistant variety, Thavalakannan, and a susceptible variety, Pooja, to identify QTL for bakanae disease resistance. The population was challenged with a highly virulent Gerua F3 strain of the Fusarium fujikuroi pathogen in three different experiments. The percent disease incidence calculated over three experiments and the genotypic information of the population were used to identify the QTL. A main effect QTL was identified on chromosome 5 with 8.97% phenotypic variation explained. In the interval of the main effect QTL, the genes controlling gibberellic acid biosynthesis pathways were identified, indicating the significance of the QTL identified. Furthermore, seven di-QTL interactions favoring resistance were identified on different chromosomes. The main effect QTL has scope for utilization in marker-assisted introgression breeding, and interactive QTL may be utilized in genomic selection to improve disease resistance.

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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
92
审稿时长
6-12 weeks
期刊介绍: This journal publishes original papers presenting new scientific results on breeding, genetics, physiology, pathology and production of primarily wheat, rye, barley, oats and maize.
期刊最新文献
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