Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Mapping of a Major QTL, <i>qBK1<sup>Z</sup></i>, for Bakanae Disease Resistance in Rice
oleh: Sais-Beul Lee, Namgyu Kim, Sumin Jo, Yeon-Jae Hur, Ji-Youn Lee, Jun-Hyeon Cho, Jong-Hee Lee, Ju-Won Kang, You-Chun Song, Maurene Bombay, Sung-Ryul Kim, Jungkwan Lee, Young-Su Seo, Jong-Min Ko, Dong-Soo Park
Format: | Article |
---|---|
Diterbitkan: | MDPI AG 2021-02-01 |
Deskripsi
Bakanae disease is a fungal disease of rice (<i>Oryza sativa</i> L.) caused by the pathogen <i>Gibberella fujikuroi</i> (also known as <i>Fusarium fujikuroi</i>). This study was carried out to identify novel quantitative trait loci (QTLs) from an <i>indica</i> variety Zenith. We performed a QTL mapping using 180 F<sub>2:9</sub> recombinant inbred lines (RILs) derived from a cross between the resistant variety, Zenith, and the susceptible variety, Ilpum. A primary QTL study using the genotypes and phenotypes of the RILs indicated that the locus <i>qBK1<sup>z</sup></i> conferring bakanae disease resistance from the Zenith was located in a 2.8 Mb region bordered by the two RM (Rice Microsatellite) markers, RM1331 and RM3530 on chromosome 1. The log of odds (LOD) score of <i>qBK1<sup>z</sup></i> was 13.43, accounting for 30.9% of the total phenotypic variation. A finer localization of <i>qBK1<sup>z</sup></i> was delimited at an approximate 730 kb interval in the physical map between Chr01_1435908 (1.43 Mbp) and RM10116 (2.16 Mbp). Introducing <i>qBK1<sup>z</sup></i> or pyramiding with other previously identified QTLs could provide effective genetic control of bakanae disease in rice.