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GrainGenes Reference Report: GES-36-313

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Reference	GES-36-313
Title	Induction and transmission of wheat-Haynaldia villosa chromosomal translocations.
Journal	Journal of Genetics and Genomics (Yi Chuan Xue Bao)
Year	2009
Volume	36
Pages	313-320
Author	Cao Y Bie T Wang X Chen P
Abstract	In order to develop more wheat-Haynaldia villosa translocations involving different chromosomes and chromosome segments of H. villosa, T. durum-H. villosa amphiploid was irradiated with (60)Co gamma-rays at doses of 800, 1,200, and 1,600 rad. Pollen collected from the spikes 1, 2, and 3 days after irradiation were transferred to emasculated spikes of the common wheat cv. 'Chinese Spring'. Genomic in situ hybridization was used to identify wheat-H. villosa chromosome translocations in the M(1) generation. Transmission of the identified translocation chromosomes was analyzed in the BC(1), BC(2), and BC(3) generations. The results indicated that all three irradiation doses were highly efficient for inducing wheat-alien translocations without affecting the viability of the M(1) seeds. Within the range of 800-1,600 rad, both the efficiency of translocation induction and the frequency of interstitial chromosome breakage-fusion increased as the irradiation dosage increased. A higher translocation induction frequency was observed using pollen collected from the spikes 1 day after irradiation over that of 2 or 3 days after irradiation. More than 70% of the translocations detected in the M(1) generation were transmitted to the BC(1) through the female gametes. All translocations recovered in the BC(1) generation were recovered in the following BC(2), and BC(3) generations. The transmission ability of different translocation types in different genetic backgrounds showed an order of 'whole-arm translocation > small alien segment translocation > large alien segment translocation', through either male or female gametes. In general, the transmission ability through the female gametes was higher than that through the male gametes. By this approach, 14 translocation lines that involved different H. villosa chromosomes have been identified in the BC(3) using EST-STS markers, and eight of them were homozygous.
External Databases	http://dx.doi.org/10.1016/S1673-8527(08)60120-4

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