Identification of genetic determinants that define different degrees of line sensitivity to the photoperiod was acomplished using near-isogenic lines of the soft hexaploid wheat Triticum aestivum L. using SSR markers and markers specific to the Vrn and Ppd genes. It was established that the Ppd-s line contains a dominant Ppd-D1a allele located on chromosome 2D. This allele is characterized by a large deletion in the gene promoter region. For two other lines (Ppd-m and Ppd-w), introgression of the Ppd-B1 gene on chromosome 2B was detected from the parental Sonora variety, which is insensitive to the day length; however, the previously described Ppd-B1a.1 allele was not found. Another polymorphism that can cause weak photoperiodic sensitivity, an increased copy number of the Ppd-B1 gene, was detected for these lines.
Russian Journal of Genetics – Springer Journals
Published: Jul 24, 2014
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