caa a22 4500 47579348X CHVBK 20180406123716.0 cr unu---uuuuu 170329e20001101xx s 000 0 eng 10.1007/s001220051587 doi (NATIONALLICENCE)springer-10.1007/s001220051587 Mapping QTLs controlling grain yield and its components on chromosome 5A of wheat [Elektronische Daten] [K. Kato, H. Miura, S. Sawada] Abstract : Chromosome 5A of wheat is known to carry a number of genes affecting adaptability and productivity. To localize quantitative trait loci (QTLs) controlling grain yield and its components, an RFLP map was constructed from 118 single-chromosome recombinant lines derived from the F1 between Chinese Spring (Cappelle-Desprez 5A) and Chinese Spring (Triticum spelta 5A). The map was combined with the field-trial data scored over 3 years. A total of five regions in chromosome 5A contributed effects on yield traits. Increases in grain yield, 50-grain weight and spikelet number/ear were determined by complementary QTL alleles from both parents. The effects associated with the vernalization requirement gene Vrn-A1 or a closely linked QTL were significant only in the favorable growing season where the later-flowering vrn-A1 allele from Cappelle-Desprez 5A produced a higher tiller number/plant and spikelet number/ear. The effects of the ear morphology gene q or closely linked QTL(s) were detected for grain yield and ear grain weight. Three other QTLs with minor effects were dispersed along chromosome 5A. These QTLs had large interactions with years due to changes in the magnitude of the significant response. The alleles from T. spelta, however, conferred a higher yield performance. Springer-Verlag Berlin Heidelberg, 2000 Key words Triticum aestivum nationallicence Grain yield nationallicence Yield components nationallicence QTLs nationallicence Single-chromosome recombinant lines nationallicence Kato K. Department of Crop Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan e-mail: kiyoaki@obihiro.ac.jp, JP aut Miura H. Department of Crop Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan e-mail: kiyoaki@obihiro.ac.jp, JP aut Sawada S. Department of Crop Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan e-mail: kiyoaki@obihiro.ac.jp, JP aut https://doi.org/10.1007/s001220051587 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051587 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kato K. Department of Crop Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan e-mail: kiyoaki@obihiro.ac.jp, JP aut NATIONALLICENCE 700 1- Miura H. Department of Crop Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan e-mail: kiyoaki@obihiro.ac.jp, JP aut NATIONALLICENCE 700 1- Sawada S. Department of Crop Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan e-mail: kiyoaki@obihiro.ac.jp, JP aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer