A Novel Locus for Bakanae Disease Resistance, <i>qBK4<sup>T</sup></i>, Identified in Rice

oleh: Sais-Beul Lee, Ji-Yoon Lee, Ju-Won Kang, Hyunggon Mang, Nkulu Rolly Kabange, Gi-Un Seong, Youngho Kwon, So-Myeong Lee, Dongjin Shin, Jong-Hee Lee, Jun-Hyeon Cho, Ki-Won Oh, Dong-Soo Park

Format: Article
Diterbitkan: MDPI AG 2022-10-01

Deskripsi

Bakanae disease caused by <i>Fusarium fujikuroi</i> causes crop failure and yield losses in the majority of rice-growing countries. In this study, we employed a joint strategy quantitative trait locus (QTL) mapping–Genome-Wide Association Study (GWAS) to investigate novel genetic loci associated with Bakanae disease resistance using a population of 143 BC<sub>1</sub>F<sub>8</sub> RILs derived from a cross between Ilpum × Tung Tin Wan Hien1. The phenotypic data from the bioassay and the genotypic data generated using a DNA chip were utilized to perform QTL mapping and GWAS study. Our results identified a novel genetic locus <i>qBK4<sup>T</sup></i> associated with Bakanae disease resistance, which was mapped on chromosome 4 and flanked by AX-116847364 (33.12 Mbp) and AX-115752415 (33.44 Mbp) markers covering a region of 324kbp. There were 34 genes in this region including Os04g55920 (encoding a zinc-finger protein, <i>OsJAZ1</i>), Os04g55970 (encoding AP2-like ethylene-responsive transcription factor), etc. This study proposes <i>qBK4<sup>T</sup></i> as a novel locus for Bakanae disease resistance. The identification of <i>qBK4<sup>T</sup></i> and its flanking marker information could be useful for marker-assisted breeding and functional characterization of resistance genes against bakanae disease.