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Postulation of Seedlings Resistance Genes to Yellow Rust in Commercial Wheat Cultivars from Yunnan Province in China



Postulation of Seedlings Resistance Genes to Yellow Rust in Commercial Wheat Cultivars from Yunnan Province in China



Agricultural Sciences in China 10(11): 0-1731



The objective of this study was to characterize yellow (stripe) rust resistance gene(s) in 52 commercial wheat cultivars from Yunnan Province in China, and to provide information for their rational deployment in field. Seedlings of wheat cultivars were inoculated with 25 differential isolates ofPuccinia striiformisfrom foreign and home to postulate resistance genes to yellow rust, and then validated by pedigree. There were 1 probable resistance genes characterized in these cultivars, in which,Yr9was most commonly postulated to be present in thirteen cultivars.Yr21, the second, was present in four cultivars.Yr8, the third, were present in three cultivars.Yr6,Yr17andYr26, the fourth, was present in two cultivars respectively. The other gene(s) such as,Yr2+YrA,Yr7andYr27, were only present in single cultivar(s); unknown gene(s) or gene(s) combination(s) were present in 22 cultivars. One cultivar (Yunmai 42) had no resistance gene tested in this study. Cultivars such as Yunmai 52, Mian 1971-98, Kunmai 4, and Yunmai 56 carried effective genes and can be popularized mainly;Yr9should be planted with otherYrgenes. In the meantime other effective genes should be introduced to realize gene diversity for controlling wheat yellow rust. Yunmai 42 should be reduced to avoid rust breakout. Unknown gene cultivars should be utilized and be researched deeply.

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Accession: 036256046

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DOI: 10.1016/s1671-2927(11)60171-5


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