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Precisely mapping a major QTL for grain weight on chromosome 5B of the founder parent Chuanmai42 in the wheat-growing region of southwestern China.

Authors :
Ye M
Wan H
Yang W
Liu Z
Wang Q
Yang N
Long H
Deng G
Yang Y
Feng H
Zhou Y
Yang C
Li J
Zhang H
Source :
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik [Theor Appl Genet] 2023 May 31; Vol. 136 (6), pp. 146. Date of Electronic Publication: 2023 May 31.
Publication Year :
2023

Abstract

Key Message: QTgw.saas-5B was validated as a major thousand-grain weight-related QTL in a founder parent used for wheat breeding and then precisely mapped to a 0.6 cM interval. Increasing the thousand-grain weight (TGW) is considered to be one of the most important ways to improve yield, which is a core objective among wheat breeders. Chuanmai42, which is a wheat cultivar with high TGW and a high and stable yield, is a parent of more than 30 new varieties grown in southwestern China. In this study, a Chuanmai42-derived recombinant inbred line (RIL) population was used to dissect the genetic basis of TGW. A major QTL (QTgw.saas-5B) mapped to the Xgwm213-Xgwm540 interval on chromosome 5B of Chuanmai42 explained up to 20% of the phenotypic variation. Using 71 recombinants with a recombination in the QTgw.saas-5B interval identified from a secondary RIL population comprising 1818 lines constructed by crossing the QTgw.saas-5B near-isogenic line with the recurrent parent Chuannong16, QTgw.saas-5B was delimited to a 0.6 cM interval, corresponding to a 21.83 Mb physical interval in the Chinese Spring genome. These findings provide the foundation for QTgw.saas-5B cloning and its use in molecular marker-assisted breeding.<br /> (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)

Details

Language :
English
ISSN :
1432-2242
Volume :
136
Issue :
6
Database :
MEDLINE
Journal :
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Publication Type :
Academic Journal
Accession number :
37258797
Full Text :
https://doi.org/10.1007/s00122-023-04383-1