AUTHOR=Wen Yi , Fang Yunxia  , Hu Peng , Tan Yiqing , Wang Yueying , Hou Linlin , Deng Xuemei , Wu Hao , Zhu Lixin , Zhu Li , Chen Guang , Zeng Dali , Guo Longbiao , Zhang Guangheng , Gao Zhenyu , Dong Guojun , Ren Deyong , Shen Lan , Zhang Qiang , Xue Dawei , Qian Qian , Hu Jiang 

TITLE=Construction of a High-Density Genetic Map Based on SLAF Markers and QTL Analysis of Leaf Size in Rice

JOURNAL=Frontiers in Plant Science

VOLUME=11

YEAR=2020

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2020.01143

DOI=10.3389/fpls.2020.01143

ISSN=1664-462X

ABSTRACT=<p>Leaf shape is an important agronomic trait for constructing an ideal plant type in rice, and high-density genetic map is facilitative in improving accuracy and efficiency for quantitative trait loci (QTL) analysis of leaf trait. In this study, a high-density genetic map contained 10,760 specific length amplified fragment sequencing (SLAF) markers was established based on 149 recombinant inbred lines (RILs) derived from the cross between Rekuangeng (RKG) and Taizhong1 (TN1), which exhibited 1,613.59 cM map distance with an average interval of 0.17 cM. A total of 24 QTLs were detected and explained the phenotypic variance ranged from 9% to 33.8% related to the leaf morphology across two areas. Among them, one uncloned major QTL <italic>qTLLW1</italic> (<italic>qTLL1</italic> and <italic>qTLLW1</italic>) involved in regulating leaf length and leaf width with max 33.8% and 22.5% phenotypic variance respectively was located on chromosome 1, and another major locus <italic>qTLW4</italic> affecting leaf width accounted for max 25.3% phenotypic variance was mapped on chromosome 4. Fine mapping and qRT-PCR expression analysis indicated that <italic>qTLW4</italic> may be allelic to <italic>NAL1</italic> (<italic>Narrow leaf 1</italic>) gene.</p>