A haplotype specific to North European wheat (Triticum aestivum L.)

Autor: Hilma Peuša, Irena Jakobson, Jaroslav Doležel, Miroslav Valárik, Mari Järve, Jelena Tsõmbalova, Jan Vrána, Marie Kubaláková, Kadri Järve, Miroslava Karafiátová
Rok vydání: 2016
Předmět:
Zdroj: Genetic Resources and Crop Evolution. 64:653-664
ISSN: 1573-5109
0925-9864
Popis: A previous study indicated decreased DNA content of chromosome 4A in the wheat (Triticum aestivum L. cv. Tahti) compared to cvs. Chinese Spring and Rennan. Here we show that the lower 4A DNA content is associated with a specific haplotype in the distal part of 4AL. In 41 cultivars of bread wheat (T. aestivum L.), including cv. Tahti, a common haplotype was identified in the linkage disequilibrium region on the long arm of chromosome 4A (4AL). The haplotype (haplotype A) is characterized by 7 SSR and 5 EST marker alleles, including five zero-alleles. Haplotype A was found in 46 % of the Swedish/Finnish/Estonian spring wheat genotypes, while only one of the modern wheat accessions from Germany carried the same haplotype. Fluorescent cytometry analysis linked haplotype A to diminished DNA content of chromosome 4A. The haplotype was introduced into the Canadian and US breeding programs at the beginning of the twentieth century (cvs. Marquis, Thatcher, Ruby) from the common progenitor, the Polish landrace Fife, and it is still found in modern wheat germplasm in these countries. Zero-alleles characteristic for haplotype A were also detected in several accessions of European spelt (Triticum spelta L.), and in two accessions of tetraploid Triticum timopheevii Zhuk. The presence of haplotype A in European spelt indicates the considerable antiquity of the haplotype, as it must have been inherited from the hexaploid or tetraploid parent of spelt in at least one hybridization event.
Databáze: OpenAIRE
Externí odkaz: