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Exploration of quality variation and stability of hybrid rice under multi-environments.

Authors :
Chen, Rirong
Li, Dongxu
Fu, Jun
Fu, Chenjian
Qin, Peng
Zhang, Xuanwen
Sun, Zhenbiao
He, Kui
Li, Liang
Zhou, Wei
Wang, Yingjie
Wang, Kai
Liu, Xuanming
Yang, Yuanzhu
Source :
Molecular Breeding. Jan2024, Vol. 44 Issue 1, p1-21. 21p.
Publication Year :
2024

Abstract

Improving quality is an essential goal of rice breeding and production. However, rice quality is not solely determined by genotype, but is also influenced by the environment. Phenotype plasticity refers to the ability of a given genotype to produce different phenotypes under different environmental conditions, which can be a representation of the stability of traits. Seven quality traits of 141 hybrid combinations, deriving from the test-crossing of 7 thermosensitive genic male sterile (TGMS) and 25 restorer lines, were evaluated at 5 trial sites with intermittent sowing of three to five in Southern China. In the Yangtze River Basin, it was observed that delaying the sowing time of hybrid rice combinations leads to an improvement in their overall quality. Twelve parents were identified to have lower plasticity general combing ability (GCA) values with increased ability to produce hybrids with a more stable quality. The parents with superior quality tend to exhibit lower GCA values for plasticity. The genome-wide association study (GWAS) identified 13 and 15 quantitative trait loci (QTLs) associated with phenotype plasticity and BLUP measurement, respectively. Notably, seven QTLs simultaneously affected both phenotype plasticity and BLUP measurement. Two cloned rice quality genes, ALK and GL7, may be involved in controlling the plasticity of quality traits in hybrid rice. The direction of the genetic effect of the QTL6 (ALK) on alkali spreading value (ASV) plasticity varies in different cropping environments. This study provides novel insights into the dynamic genetic basis of quality traits in response to different cropping regions, cultivation practices, and changing climates. These findings establish a foundation for precise breeding and production of stable and high-quality rice. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
13803743
Volume :
44
Issue :
1
Database :
Academic Search Index
Journal :
Molecular Breeding
Publication Type :
Academic Journal
Accession number :
175636850
Full Text :
https://doi.org/10.1007/s11032-024-01442-3