Feb 27, 2015

Addition of rye chromosome 4R to wheat increases anther length and pollen grain number

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Vy NguyenTakashi Okada


The research identified rye chromosome 4R arms associated with good pollinator traits, and demonstrated possible use of rye genetic resources to develop elite pollinators for hybrid wheat breeding. Bread wheat (Triticum aestivum) is a predominantly self-pollinating plant which has relatively small-sized anthers and produces a low number of pollen grains. These features limit the suitability of most wheat lines as pollinators for hybrid seed production. One strategy for improving the pollination ability of wheat is to introgress cross-pollination traits from related species. One such species is rye (Secale cereale L.), which has suitable traits such as high anther extrusion, long anthers containing large amounts of pollen and long pollen viability. Therefore, introducing these traits into wheat is of great interest in hybrid wheat breeding. Here, we investigated wheat-rye chromosome addition lines for the effects of rye chromosomes on anther and pollen development in wheat. Using a single nucleotide polymorphism genotyping array, we detected 984 polymorphic markers that showed expected syntenic relationships between wheat and rye. Our results revealed that the addition of rye chromosomes 1R or 2R reduced pollen fertility, while ...Continue Reading

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Mentioned in this Paper

Biological Markers
Gene Polymorphism
Plant Carpals
SPP2 dioxygenase
Infertility Study
Hybridization, Intraspecies
Genetic Markers

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