Inheritance of stripe rust resistance in a restorer line of thermo-photo-sensitive sterile wheat MR168.

Abstract

Breeding thermo-photo sensitive two-line hybrid wheat(Triticum aestivum L.) is one of the main ways studied in China in heterosis utilization of wheat.In 2007,Mianzamai 168(MTS-1/MR168) was the first two-line hybrid wheat registered in China and Sichuan province.The restore line MR168 with high heritability for stripe rust resistance in the two-line hybrid combination.In order to investigate the origin and inheritance of stripe rust resistant gene in the restore line MR168,two sets of populations of SY95-71/MR168 and Mianyang 26/MR168 were analyzed.The results indicated that the resistance for race CY32 of MR168 was controlled by one pair of dominant genes.The gene originated from Liaochun 10 which was a spring wheat variety.Stripe rust resistance of MR168,four Thermo-Photo sensitive male sterile lines and their hybrids were studied,the results showed that MR168 resisted to stripe rust and with high heritability.It was propitious to breed two-line hybrid wheat with high resistance to stripe rust.

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