GrainGenes Reference Report: MBR-39:150
Reference
MBR-39:150
Title
Isolation and characterization of TaQsd1 genes for period of dormancy in common wheat (Triticum aestivum L.)
Year
2019
Volume
150
Author
Wei W
[ Show all 15 ]
Abstract
Pre-harvest sprouting (PHS) can result in obvious reduction of wheat grain yield and quality. Based on the sequence of barley Qsd1 gene, three homologs in common wheat were isolated, designated TaQsd1-5A, TaQsd1-5B, and TaQsd1-5D, respectively. Two CAPS (QSD1 and QSD3) and one KASP (QSD2) markers for TaQsd1-5B were developed and validated both in a natural population consisting of 351 wheat varieties and one RIL population from the cross of Yangxiaomai x Zhongyou 9507. The marker QSD1 co-segregated with a major QTL for the period of dormancy (PD) in the RIL population. The transcript levels of TaQsd1-5B were significantly higher in long-dormancy varieties (lines) than in short-dormancy varieties (lines) during seed imbibition, which is consistent with the activity of the AlaAT enzyme encoded by TaQsd1-5B. Meanwhile, we also found higher expression levels of ABA biosynthesis and signaling genes and higher endogenous ABA contents, but lower expression levels of genes for ABA catabolism in long-dormancy varieties. The allele TaQsd1-5Ba associated with longer PD was more frequently present in Chinese landrace wheats, compared with Chinese modern cultivars and foreign germplasms. These findings provide important insight into understanding the regulatory mechanism of TaQsd1 with respect to PD and molecular markers for improvement of PHS resistance in wheat breeding programs.
External Databases
https://doi.org/10.1007/s11032-019-1060-x
Gene
TaQsd1
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: MBR-39:150
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||