Inbreeding depression and dominance-suppression competition after inbreeding in rapeseed (Brassica napus)
✍ Scribed by C. Damgaard; V. Loeschcke
- Publisher
- Springer
- Year
- 1994
- Tongue
- English
- Weight
- 330 KB
- Volume
- 88-88
- Category
- Article
- ISSN
- 0040-5752
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✦ Synopsis
Rapeseed plants, of the summer annual variety Topas, that had been selfed twice consecutively were compared to outcrossed half-sibs for inbreeding depression in a rapeseed population at mating equilibrium. The effect of dominance-suppression competition was included in the effect of inbreeding. Both female-and male-fitness characters showed significant inbreeding depression. Biomass decreased 17% with inbreeding and was highly correlated with seed weight. The total number of flowers decreased 15% with inbreeding. There was a significant effect of lines. The possible importance of experimental design in studies that estimate inbreeding depression is discussed.