Powdery mildew, caused by Blumeria graminis f. sp. tritici, is one of the most devastating wheat diseases. Wild emmer wheat（Triticum turgidum ssp. dicoccoides） is a promising source of disease resistance for wheat. ...Powdery mildew, caused by Blumeria graminis f. sp. tritici, is one of the most devastating wheat diseases. Wild emmer wheat（Triticum turgidum ssp. dicoccoides） is a promising source of disease resistance for wheat. A powdery mildew resistance gene conferring resistance to B. graminis f. sp. tritici isolate E09, originating from wild emmer wheat, has been transferred into the hexaploid wheat line WE4 through crossing and backcrossing. Genetic analyses indicated that the powdery mildew resistance was controlled by a single dominant gene, temporarily designated Ml WE4. By mean of comparative genomics and bulked segregant analysis, a genetic linkage map of Ml WE4 was constructed, and Ml WE4 was mapped on the distal region of chromosome arm 5BL. Comparative genetic linkage maps showed that genes Ml WE4, Pm36 and Ml3D232 were co-segregated with markers XBD37670 and XBD37680, indicating they are likely the same gene or alleles in the same locus. The co-segregated markers provide a starting point for chromosome landing and map-based cloning of Ml WE4, Pm36 and Ml3D232.展开更多
Emmer wheat cultivated by organic farmers is used as a component of some bio （organic） food products. Its positive influence on consumer health is caused by grain composition. With the aim of selecting varieties or ...Emmer wheat cultivated by organic farmers is used as a component of some bio （organic） food products. Its positive influence on consumer health is caused by grain composition. With the aim of selecting varieties or landraces for their possible further use we tested selected emmer wheat accessions maintained in the Czech Gene Bank. In the set of 8 emmer wheat accessions, the main grain components, bread making characteristics and contents of health supporting chemical substances such as total dietary fibre content and its components, content of total polyphenols plus catechin and ferulic acid contents, vitamins of the B group and E plus total content of carotenoids were evaluated by standard methods. Tests of bread making quality confirmed a very well known fact that emmer wheat grain is much more suitable for other purposes as whole grain mixtures, cereal pure, etc. than for bread preparation. The results indicate the possibilities to select emmer wheat genotypes differing in grain composition and containing compounds with positive effects on human health. Among the tested emmer wheat accessions the Rudico variety had a complex of positive characteristics such as content of total dietary fibre, total polyphenol content with prevailing catechin and the highest amount of B group vitamins such as B 1, B2, niacin, pantothenic acid and B6.展开更多
基金financially supported by the National HighTech R&D Program of China (2011AA100104)the National Basic Research Program of China (2013CB127705)+1 种基金the National Natural Science Foundation of China (31030056, 31210103902)the Introducing Talents of Disciplines to Universities,Ministry of Education (MOE) of China (111-02-3)
文摘Powdery mildew, caused by Blumeria graminis f. sp. tritici, is one of the most devastating wheat diseases. Wild emmer wheat（Triticum turgidum ssp. dicoccoides） is a promising source of disease resistance for wheat. A powdery mildew resistance gene conferring resistance to B. graminis f. sp. tritici isolate E09, originating from wild emmer wheat, has been transferred into the hexaploid wheat line WE4 through crossing and backcrossing. Genetic analyses indicated that the powdery mildew resistance was controlled by a single dominant gene, temporarily designated Ml WE4. By mean of comparative genomics and bulked segregant analysis, a genetic linkage map of Ml WE4 was constructed, and Ml WE4 was mapped on the distal region of chromosome arm 5BL. Comparative genetic linkage maps showed that genes Ml WE4, Pm36 and Ml3D232 were co-segregated with markers XBD37670 and XBD37680, indicating they are likely the same gene or alleles in the same locus. The co-segregated markers provide a starting point for chromosome landing and map-based cloning of Ml WE4, Pm36 and Ml3D232.
文摘Emmer wheat cultivated by organic farmers is used as a component of some bio （organic） food products. Its positive influence on consumer health is caused by grain composition. With the aim of selecting varieties or landraces for their possible further use we tested selected emmer wheat accessions maintained in the Czech Gene Bank. In the set of 8 emmer wheat accessions, the main grain components, bread making characteristics and contents of health supporting chemical substances such as total dietary fibre content and its components, content of total polyphenols plus catechin and ferulic acid contents, vitamins of the B group and E plus total content of carotenoids were evaluated by standard methods. Tests of bread making quality confirmed a very well known fact that emmer wheat grain is much more suitable for other purposes as whole grain mixtures, cereal pure, etc. than for bread preparation. The results indicate the possibilities to select emmer wheat genotypes differing in grain composition and containing compounds with positive effects on human health. Among the tested emmer wheat accessions the Rudico variety had a complex of positive characteristics such as content of total dietary fibre, total polyphenol content with prevailing catechin and the highest amount of B group vitamins such as B 1, B2, niacin, pantothenic acid and B6.
基金the National High Technology Research and Development Program of China (863Program)(2003AA207100) and the Key Technologies R&D Program of Shaanxi Province(2003K03-G1-02)
