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Data · dataset · 2022

Association of TaD14-4D, a Gene Involved in Strigolactone Signaling, with Yield Contributing Traits in Wheat

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Tillering is a crucial agronomic trait of wheat; it determines yield and plant architecture.Strigolactones (SLs) have been reported to inhibit plant branching.

Description

D14, a receptor of SLs, has been described to affect tillering in rice, yet it has seldomly been studied in wheat. In this study,three TaD14 homoeologous genes, TaD14-4A, TaD14-4B, and TaD14-4D, were identified.

TaD14-4A,TaD14-4B, and TaD14-4D were constitutively expressed, and TaD14-4D had a higher expression level in most tissues. TaD14 proteins were localized in both cytoplasm and nucleus. An SNP and a 22 bp insertion/deletion (Indel) at the exon regions of TaD14-4D were detected, forming three haplotypes, namely 4D-HapI, 4D-HapII, and 4D-HapIII.

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Due to the frameshift mutation in the coding region of 4D-HapII, the interaction of 4D-HapII with TaMAX2 and TaD53 was blocked, which led to the blocking of SL signal transduction. Based on the two variation sites, two molecular markers, namely dCAPS-250 and Indel-747, were developed. Association analysis suggested that haplotypes of TaD14-4D were associated with effective tillering number (ETN) and thousand kernel weight (TKW) simultaneously in four environments.

The favorable haplotype 4D-HapIII underwent positive selection in global wheat breeding. This study provides insights into understanding the function of natural variations of TaD14-4D and develops two useful molecular markers for wheat breeding.

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Crop and pasture production 71%
Provenance · 1 source records, 11 field assertions
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ScienceDB10.57760/sciencedb.0303510 d agoJSON v1
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