Abstract
Seventy-two XinjiangTriticum andTriticum polonicum accessions were subjected to AFLP analyses to discuss the origin ofTriticum petropavlovskyi. A total of 91 putative loci were produced by four primer combinations. Among them 56 loci were polymorphic, which is equivalent to 61.53 % of the total number of putative loci. Genetic diversity among 11T. petropavlovskyi accessions was narrow due to the lowest number (32) of polymorphic loci among the wheat species. Forty four polymorphic loci were found inT. aestivum andT. compactum, whereas the highest polymorphism was observed inT. polonicum. On the basis of the UPGMA clustering and PCO grouping and genetic similarity estimates from the AFLPs, we noted thatT. petropavlovskyi was more closely related to the Chinese accessions ofT. polonicum than toT. polonicum from other countries. Two accessions ofT. aestivum were grouped withT. petropavlovskyi in the UPGMA clustering. Both of them were similar toT. petropavlovskyi in respect of spike structure, i.e. the presence of awn, glume awn and also the presence of leaf pubescence. Six loci, which were commonly absent in ChineseT. polonicum, were also absent in almost all of theT. petropavlovskyi accessions. Findings of this study reduced the probability of an independent allopolyploidization event in the origin ofT. petropavlovskyi and indicated a greater degree of gene flow betweenT. aestivum andT. polonicum leading toT. petropavlovskyi. It is most likely that theP-gene ofT. petropavlovskyi hexaploid wheat was introduced fromT. polonicum toT. aestivum via a spontaneous introgression or breeding effort.
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Akond, M.A.S.M.G., Watanabe, N. & Furuta, Y. Exploration of genetic diversity among XinjiangTriticum andTriticum polonicum by AFLP markers. J Appl Genet 48, 25–33 (2007). https://doi.org/10.1007/BF03194654
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DOI: https://doi.org/10.1007/BF03194654