Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea spp. Capitata). IV. A resistant 18-chromosome B1 plant and its B2 progenies |
| |
| Authors: | B. Y. Chiang M. S. Chiang W. F. Grant R. Crete |
| |
| Affiliation: | (1) Genetics Laboratory, Department of Plant Science, McGill University, Macdonald Campus, Ste-Anne-de-Bellevue, Québec, Canada;(2) Research Station, Agriculture Canada, St. Jean, Québec, Canada |
| |
| Abstract: | Summary The somatic karyotype and meiotic chromosome behavior were studied in an 18-chromosome B1 plant derived from backcrossing a triploid (Brassica napus x B. oleracea ssp. capitata) F1 hybrid to cabbage. It is considered that cabbage chromosomes no. 1 and no. 7 were substituted by two shorter B. napus chromosomes. Meiotic disturbances were more apparent during the late stages of second division. Seed fertility of this plant was largely restored in the second backcrosses with both cabbage and broccoli. 18-chromosome B2 plants resistant to race 2 of Plasmodiophora brassicae were recovered among the progenies.Contribution no. J. 725 from the Research Station, Research Branch, Agriculture Canada, St-Jean, Québec J3B 6Z8. |
| |
| Keywords: | Crucifers Brassica napus rutabaga Brassica oleracea ssp. capitata cabbage Brassica oleracea var. italica broccoli Plasmodiophora brassicae clubroot disease fungal resistance interspecific hybrids backcrosses resistance breeding karyotype meiosis |
| 本文献已被 SpringerLink 等数据库收录！ |
|
