ISHS Acta Horticulturae 459: International Symposium Brassica 97, Xth Crucifer Genetics Workshop
COMPLEXITY OF SELF-INCOMPATABILITY PHENOTYPE IN BRASSICA: ITS MEASURE AND SOME THOUGHTS ABOUT ITS GENETIC CONTROL |
| Author: | V. Ruffio-Châble |
| Keywords: | Brassica oleracea, S-Locus |
| Abstract:
The Brassica breeder seeks precise tools for measuring the self-incompatibility phenotype. Two aspects have to be taken into account: the recognition system and the rejection of pollen by the stigma. Different techniques of measurement of the recognition system (biological, biochemical and molecular) are already available. We present here results which demonstrate the complexity of the rejection phenotype: (i) no relation between recognition and rejection phenotype, (ii) the evolution of a rejection phenomena throughout the period of stigma receptivity, (iii) the independence of stigma and pollen phenotypes. Whilst the recognition phenotype appears to be under control of the S locus, one or more different loci may control the rejection phenotype. Breeders are currently equipped with tools for investigating the recognition system in Brassica. However, there is a need for more precise knowledge of the genetic control of the rejection mechanism. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
