QTug.sau-3B is a major quantitative trait locus for wheat hexaploidization.
Bottom Line: Meiotic nonreduction resulting in unreduced gametes is thought to be the predominant mechanism underlying allopolyploid formation in plants.Comparative genome analysis indicated that this QTL was close to Ttam-3B, a collinear homolog of tam in wheat.Although the relationship between QTug.sau-3B and Ttam requires further study, high frequencies of unreduced gametes may be related to reduced expression of Ttam in wheat.
Affiliation: Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, Sichuan 611130, People's Republic of China.Show MeSH
Mentions: The populations used for QTL mapping were previously produced (Zhang et al. 2011). In brief (Figure 1), diploid AS60 was used to pollinate tetraploid LDN×AS313 and LDN×AS2255 F1 hybrids to form triploid F1 hybrid populations SynH1 and SynH2, respectively, which were then self-pollinated to produce doubled haploid populations SynDH1 and SynDH2 by spontaneous chromosome doubling. These mapping populations have recombinant A and B chromosomes from the T. turgidum parents in a background of nonrecombinant D chromosomes from Ae. tauschii. All above plant materials were grown at the experiment farm of the Triticeae Research Institute of Sichuan Agricultural University. The F1 seeds were germinated in Petri dishes before being transplanted into the field. Individual plants were spaced 10 cm apart within 2-m-long rows; the row spacing was 30 cm.
Affiliation: Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, Sichuan 611130, People's Republic of China.