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QTL mapping and effect confirmation for anaerobic germination tolerance derived from the japonica weedy rice landrace PBR
Author(s) -
Jeong JongMin,
Cho YoungChan,
Jeong JiUng,
Mo YoungJun,
Kim ChoonSong,
Kim WooJea,
Baek ManKee,
Kim SukMan
Publication year - 2020
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12753
Subject(s) - biology , japonica , weedy rice , quantitative trait locus , japonica rice , cultivar , germination , agronomy , seeding , sowing , oryza sativa , horticulture , botany , gene , genetics
As one of the main rice establishment methods, direct seeding has the advantages of saving labour and reducing costs for farmers. However, the expansion of direct seeding has been constrained by poorly levelled fields, heavy rainfall and poor drainage after sowing. The development of cultivars with anaerobic germination tolerance could improve or overcome these shortcomings of most rice under flooding conditions. In this study, a japonica ‐type rice with anaerobic germination tolerance was suggested as a new genetic source and QTL analysis was carried out to improve adaptation to direct seeding. Three QTLs, qAG1, qAG3 and qAG11, were identified, explaining 13.44%, 6.71% and 14.52% of the phenotypic variance, respectively. In an evaluation of the most effective QTL combination, two QTL combinations ( qAG1 NP + qAG3 PBR + qAG11 PBR and qAG1 NP + qAG11 PBR ) showed stable survival rates under submergence of filed condition. Based on the results, we will characterize the candidate genes within the detected target regions in further research, and the lines with advantageous alleles will be used to develop reliable cultivars to support the wide adoption of direct‐seeding practices in japonica rice.