caa a22 4500 475795903 CHVBK 20180406123724.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1007/s001220051360 doi (NATIONALLICENCE)springer-10.1007/s001220051360 Genomic regions affecting seed shattering and seed dormancy in rice [Elektronische Daten] [H.-W. Cai, Hiroko Morishima] Abstract : Non-shattering of the seeds and reduced seed dormancy were selected consciously and unconsciously during the domestication of rice, as in other cereals. Both traits are quantitative and their genetic bases are not fully elucidated, though several genes with relatively large effects have been identified. In the present study, we attempted to detect genomic regions associated with shattering and dormancy using 125 recombinant inbred lines obtained from a cross between cultivated and wild rice strains. A total of 147 markers were mapped on 12 rice chromosomes, and QTL analysis was performed by simple interval mapping and composite interval mapping. For seed shattering, two methods revealed the same four QTLs. On the other hand, for seed dormancy a number of QTLs were estimated by the two methods. Based on the results obtained with the intact and de-hulled seeds, QTLs affecting hull-imposed dormancy and kernel dormancy, respectively, were estimated. Some QTLs detected by simple interval mapping were not significant by composite interval mapping, which reduces the effects of residual variation due to the genetic background. Several chromosomal regions where shattering QTLs and dormancy QTLs are linked with each other were found. This redundancy of QTL associations was explained by ”multifactorial linkages” followed by natural selection favoring these two co-adapted traits. Springer-Verlag Berlin Heidelberg, 2000 Key words Wild and cultivated rice nationallicence Seed shattering nationallicence Seed dormancy nationallicence QTL analysis nationallicence Co-adapted gene block nationallicence Cai H.-W National Institute of Genetics, Mishima, 411-8540 Japan, JP aut Morishima Hiroko National Institute of Genetics, Mishima, 411-8540 Japan, JP aut https://doi.org/10.1007/s001220051360 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051360 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cai H.-W National Institute of Genetics, Mishima, 411-8540 Japan, JP aut NATIONALLICENCE 700 1- Morishima Hiroko National Institute of Genetics, Mishima, 411-8540 Japan, JP aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer