Scientia Agricultura Sinica ›› 2006, Vol. 39 ›› Issue (04): 673-678 .

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES • Previous Articles     Next Articles

Tagging a Novel Yellow Rust Gene YrG775 Derived from Aegilops ventricosa with AFLP Marker

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  • Received:2005-04-11 Revised:1900-01-01 Online:2006-04-10 Published:2006-04-10

Abstract: In this study, the F2 populations crossing by Xinong97148×Guinong775 was Inoculated with the pathology strains CY32 to test their resistance. The Chi-square tests results showed the yellow rust resistance of guinong775 was controlled by two duplicate genes. Screened 128 AFLP primer combinations, the primer combination M8P15 had a polymorphic band about 1200bp linked to the YrG775 (temporarily designed), one of the two duplicate gene. F2 segregations analysis confirmed the band co-segregated with this gene and only Aegilops ventricosa one of the original parents of guinong 775 had this polymorphic band. Since the Yr17 the only yellow rust resistance gene known to be derived from Aegilops ventricosa had no resistance to the pathology strains CY32, the gene YrG775 identified in this paper might to be a novel yellow rust resistance gene.

Key words: Wheat, Aegilops ventricosa, Yr gene, YrG775, AFLP

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