THE USE OF CELL-CULTURE FOR SUBCHROMOSOMAL INTROGRESSIONS OF BARLEY YELLOW DWARF VIRUS-RESISTANCE FROM THINOPYRUM-INTERMEDIUM TO WHEAT

文献类型： 外文期刊

第一作者： BANKS, PM

作者： BANKS, PM;LARKIN, PJ;BARIANA, HS;LAGUDAH, ES;APPELS, R;WATERHOUSE, PM;BRETTELL, RIS;CHEN, X;XU, HJ;XIN, ZY;QIAN, YT;ZHOU, XM;CHENG, ZM;ZHOU, GH

作者机构：

关键词： TRITICUM;AGROPYRON;ALIEN GENES;TRANSLOCATION;SOMATIC RECOMBINATION;LUTEOVIRUS

期刊名称：GENOME （ 影响因子：2.166； 五年影响因子：2.474 ）

ISSN： 0831-2796

年卷期： 1995 年 38 卷 2 期

页码：

收录情况： SCI

摘要： Barley yellow dwarf virus (BYDV) resistance has been transferred to wheat from a group 7 chromosome of Thinopyrum (Agropyron) intermedium. The source of the resistance gene was the L1 disomic addition line, which carries the 7Ai-1 chromosome. The resistance locus is on the long arm of this chromosome. BYDV resistant recombinant lines were identified after three or more generations of selection against a group 7 Th. intermedium short arm marker (red coleoptile) and selection for the presence of BYDV resistance. One recombinant line produced by ph mutant induced homoeologous pairing and 14 recombinant lines induced by cell culture have been identified. Resistance in seven of the cell culture induced recombinants has been inherited via pollen according to Mendelian segregation ratios for up to eight generations. Meiotic analysis of heterozygotes indicates that the alien chromatin in the cell culture induced recombinants is small enough to allow regular meiotic behaviour. The ph-induced recombinant was less regular in meiosis. A probe, pEleAcc2, originally isolated from Th. elongatum and that hybridizes to dispersed repeated DNA sequences, was utilised to detect Th. intermedium chromatin, which confers resistance to BYDV, in wheat backgrounds. Quantification of these hybridization signals indicated that the translocations involved a portion of alien chromatin that was smaller than the complete long arm of 7Ai-1. Restriction fragment length polymorphism analysis confirmed the loss of the short arm of 7Ai-1 and indicated the retention of segments of the long arm of 7Ai-1. Two 7Ai-1L DNA markers always assorted with the BYDV resistance. A third 7Ai-1L DNA marker was also present in seven of eight recombinants. In all recombinants except TC7, the 7Ai-1L markers replaced the 7DL markers. None of the wheat group 7 markers was missing from TC7. It is concluded that all the resistant lines are the result of recombination with wheat chromosome 7D, except line TC7, which is the result of recombination with an unidentified nongroup 7 chromosome.

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