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GrainGenes Reference Report: TAG-88-97

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Reference	TAG-88-97
Title	Transfer of Ph1 genes promoting homoeologous pairing from Triticum speltoides to common wheat
Journal	Theoretical and Applied Genetics
Year	1994
Volume	88
Pages	97-101
Author	Chen P Tsujimoto H Gill B
Abstract	Diploid-like chromosome pairing in polyploid wheat is controlled by several Ph (pairing homoeologous) genes with major and minor effects Homoeologous pairing occurs in either the absence of these genes or their inhibition by genes from other species (Ph(I) genes) We transferred Ph(I) genes from Triticum speltoides (syn Aegilops speltoides) to T aestivum, and on the basis of further analysis it appears that two duplicate and independent Ph(I) genes were transferred Since Ph(I) genes are epistatic to the Ph genes of wheat, homoeologous pairing between the wheat and alien chromosomes occurs in the F1 hybrids. Using the Ph(I) gene stock, we could demonstrate homoeologous pairing between the wheat and Haynaldia villosa chromosomes. Since homoeologous pairing occurs in F1 hybrids and no cytogenetic manipulation is needed, the Ph(I) gene stock may be a versatile tool for effecting rapid and efficient alien genetic transfers to wheat.
Keyword	[ Hide all but 1 of 16 ] aegilops aegilops speltoides chromosome chromosome-pairing genes gramineae haynaldia-villosa homoeologous-chromosomes intergeneric-hybridization introgression karyotype meiosis triticum triticum aestivum triticum durum triticum variabilis

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