Genome-Wide Association Analysis of Rice Leaf Traits

Author:

Wang Nansheng1,Wang Xingmeng1,Qian Yingzhi1,Bai Di1,Bao Yaling1,Zhao Xueyu1,Xu Peng1,Li Keyang12,Li Jianfeng1,Li Kang1,Zhang Dewen2,Shi Yingyao1

Affiliation:

1. College of Agronomy, Anhui Agricultural University, Hefei 230000, China

2. Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, China

Abstract

Yield-related traits have always been a research hotspot in rice breeding, and functional leaves directly affect the photosynthetic efficiency and yield of rice. Therefore, it is of great significance to explore the genes related to rice leaf size and shape to improve rice leaf morphology, photosynthesis efficiency, and yield. This study detected the quantitative trait loci (QTLs) for the length, width, length–width ratio, and area of rice flag leaf and second leaf in 393 accessions from the 3000 Rice Genome Project (3KRGP) by high-density single-nucleotide polymorphism genotyping. As a result, 91 QTLs were detected, among which 5 candidate genes (LOC_Os03g29170, LOC_Os06g17285, LOC_Os04g35060, LOC_Os03g27450, and LOC_Os09g16280) were identified. In addition, the epistatic interactions affecting leaf-related traits were also investigated, resulting in the identification of 134 significant QQIs (QTL by QTL interactions) pairs. The results of this study provide an important genetic basis for mining genes associated with rice leaf shape and valuable genetic information for rice breeding.

Funder

Scientific Research Plan Major Projects of Anhui Province

Science and Technology Major Project of Anhui Province

Improved Varieties Joint Research (Rice) Project of Anhui Province

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Agronomy and Crop Science

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