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Candidate Genes and Pathways in Rice Co-Responding to Drought and Salt Identified by gcHap Network.
Wednesday, 2022/05/18 | 08:28:17

Hao Z, Ma S, Liang L, Feng T, Xiong M, Lian S, Zhu J, Chen Y, Meng L, Li M.

Int J Mol Sci. 2022 Apr 5;23(7):4016. doi: 10.3390/ijms23074016

Abstract

Drought and salinity stresses are significant abiotic factors that limit rice yield. Exploring the co-response mechanism to drought and salt stress will be conducive to future rice breeding. A total of 1748 drought and salt co-responsive genes were screened, most of which are enriched in plant hormone signal transduction, protein processing in the endoplasmic reticulum, and the MAPK signaling pathways. We performed gene-coding sequence haplotype (gcHap) network analysis on nine important genes out of the total amount, which showed significant differences between the Xian/indica and Geng/japonica population. These genes were combined with related pathways, resulting in an interesting mechanistic draft called the 'gcHap-network pathway'. Meanwhile, we collected a lot of drought and salt breeding varieties, especially the introgression lines (ILs) with HHZ as the parent, which contained the above-mentioned nine genes. This might imply that these ILs have the potential to improve the tolerance to drought and salt. In this paper, we focus on the relationship of drought and salt co-response gene gcHaps and their related pathways using a novel angle. The haplotype network will be helpful to explore the desired haplotypes that can be implemented in haplotype-based breeding programs.

 

See https://pubmed.ncbi.nlm.nih.gov/35409377/

 

Fig.2: Frequencies of the ‘‘favorable’’ gcHaps of nine drought and salt co-response genes affecting fifteen yield traits (DTH, PH, TGW, FLL, FLW, PN, PL, CN, CL, GW, GLWR, LRI, SH and LL) in Xian/indica (XI) and Geng/japonica (GJ) modern varieties and different rice populations.

 

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