Mapping the 'breaker' element of the gametocidal locus proximal to a block of sub-telomeric heterochromatin on the long arm of chromosome 4S(sh) of Aegilops sharonensis

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Emilie KnightGraham Moore

Abstract

The 'breaker' element ( GcB ) of the gametocidal locus derived from Aegilops sharonensis has been mapped to a region proximal to a block of sub-telomeric heterochromatin on chromosome 4S (sh) L. The production of alien chromosome addition lines allows the transfer of useful genetic variation into elite wheat varieties from related wild species. However, some wild relatives of wheat, particularly those within the Sitopsis section of the genus Aegilops, possess chromosomes that are transmitted preferentially to the offspring when addition lines are generated. Species within the Sitopsis group possess the S genome, and among these species, Aegilops sharonensis (2n = 14, S(sh)S(sh)) carries the S(sh) genome which is closely related to the D genome of hexaploid wheat. Some S genome chromosomes carry gametocidal loci, which induce severe chromosome breakage in gametes lacking the gametocidal chromosome, and hence, result in gamete abortion. The preferential transmission of gametocidal loci could be exploited in wheat breeding, because linking gametocidal loci with important agronomic traits in elite wheat varieties would ensure retention of these traits through successive generations. In this study, we have mapped the breaker element...Continue Reading

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Citations

Jun 28, 2017·Genome Génome / Conseil National De Recherches Canada·M Niranjana
Feb 11, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Ghader Mirzaghaderi, Annaliese S Mason
Mar 10, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Guotai YuBrande B H Wulff
Feb 19, 2017·Genetics·Luzie U WingenSimon Griffiths

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Methods Mentioned

BETA
genotyping
PCR
2 hybrid
RNA-Seq

Software Mentioned

KlusterCaller

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