Discovery, evaluation and distribution of haplotypes of the wheat Ppd‐D1 gene
| Autor: | Yanxia Song, Ronghua Zhou, Jizeng Jia, Zheng-Long Ren, Zhiai Guo |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Genetic Markers
China Physiology Photoperiod Plant genetics Plant Science Genes Plant Genome Evolution Molecular Gene Expression Regulation Plant Genetic variation Aegilops tauschii Allele Gene Triticum Plant Proteins Genetics Geography biology Altitude Haplotype food and beverages Agriculture biology.organism_classification Haplotypes Seedlings Genetic marker |
| Zdroj: | New Phytologist. 185:841-851 |
| ISSN: | 1469-8137 0028-646X |
| DOI: | 10.1111/j.1469-8137.2009.03099.x |
| Popis: | Ppd-D1 is one of the most potent genes affecting the photoperiod response of wheat (Triticum aestivum). Only two alleles, insensitive Ppd-D1a and sensitive Ppd-D1b, were known previously, and these did not adequately explain the broad adaptation of wheat to photoperiod variation. In this study, five diagnostic molecular markers were employed to identify Ppd-D1 haplotypes in 492 wheat varieties from diverse geographic locations and 55 accessions of Aegilops tauschii, the D genome donor species of wheat. Six Ppd-D1 haplotypes, designated I-VI, were identified. Types II, V and VI were considered to be more ancient and types I, III and IV were considered to be derived from type II. The transcript abundances of the Ppd-D1 haplotypes showed continuous variation, being highest for haplotype I, lowest for haplotype III, and correlating negatively with varietal differences in heading time. These haplotypes also significantly affected other agronomic traits. The distribution frequency of Ppd-D1 haplotypes showed partial correlations with both latitudes and altitudes of wheat cultivation regions. The evolution, expression and distribution of Ppd-D1 haplotypes were consistent evidentially with each other. What was regarded as a pair of alleles in the past can now be considered a series of alleles leading to continuous variation. |
| Databáze: | OpenAIRE |
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