Cloning and mode of action of the major interspecific crossability locus (Kr1) in wheat

与栽培和野生近缘小麦相比，小麦育种家可获得的遗传多样性非常有限。然而，需要克服一些障碍，才能获得野生近缘物种的全部多样性，并通过从这种外来种质中引入理想的基因来利用这一点。第一个障碍可能是野生物种的花粉无法使小麦的子房受精。虽然小麦可以与广泛的近缘种杂交，但大多数适应的小麦品种由于花粉不能受精而不亲和，从而极大地限制了可用于异源导入的种质在小麦育种中的应用。野生近缘花粉不能穿透小麦花柱和子房的生物学基础仍有待阐明。本提案解决了这一问题。这将为谷物和牧草开辟一个新的生物学领域。

The genetic diversity available to breeders within wheat is very limited compared to that available within cultivated and wild relatives of wheat. However a number of barriers need to be overcome in order to have access to the full range of diversity within the wild relatives and to exploit this by introducing desirable genes from this exotic germplasm. The first barrier can be the failure of pollen from wild species to fertilise the wheat ovary. Although wheat can be crossed with a wide range of related species, most adapted wheat varieties are incompatible because of the failure of pollen to fertilize the ovary, thus greatly restricting the germplasm that can be used for alien introgression in wheat breeding. The biological basis for the failure of pollen from wild relatives to penetrate the wheat style and ovary remains to be elucidated. This present proposal addresses this issue. This will open up a new area of biology for cereals and grasses