Control and inheritance of resistance to yellow rust in Triticum aestivum-Lophopyrum elongatum chromosome substitution lines |
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| Authors: | Jianxin Ma Ronghua Zhou Yushen Dong Jizeng Jia |
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| Institution: | (1) Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, Beijing, 100081, P.R. China |
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| Abstract: | A set of T. aestivum-L. elongatum chromosome substitution lines was tested for yellow rust resistance at the seedling stage. Inheritance of the resistance and esterase-5 (Est-5) variation were studied. The results demonstrated that L.elongatum carried a new gene(s) conferring yellow rust resistance. This gene was dominant and located on chromosome 3E of L. elongatum. The biochemical locus encoding Est-5was also located on chromosome 3E, and co-segregated with theYr gene(s) in the wheat background. The transmission frequencies of chromosome 3E in 3E(3A) × CS, 3E(3B) × CS and 3E(3D) × CS hybrids were scored.None of the hybrids transmitted the alien chromosome at thetheoretical maximum rate, but the transmission frequencies ofchromosome 3E in F2 populations of 3E(3A) × CS and 3E(3D) × CS were significantly higher than in thatof 3E(3B) × CS. |
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| Keywords: | biochemical marker gene location Lophopyrum elongatum Puccinia striiformis stripe rust substitution line Triticum aestivum yellow rust |
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