Joshi, NV (1992) Sibling rivalry between seeds within a fruit: Some population genetic models. In: Journal of Genetics, 71 (3). pp. 105-119.
Sibling_rivalry_between.pdf - Published Version
Competition between seeds within a fruit for parental resources is described using one-locus-two-allele models. While a ï¿½normalï¿½ allele leads to an equitable distribution of resources between seeds (a situation which also corresponds to the parental optimum), the ï¿½selfishï¿½ allele is assumed to cause the seed carrying it to usurp a higher proportion of the resources. The outcome of competition between ï¿½selfishï¿½ alleles is also assumed to lead to an asymmetric distribution of resources, the ï¿½winnerï¿½ being chosen randomly. Conditions for the spread of an initially rare selfish allele and the optimal resource allocation corresponding to the evolutionarily stable strategy, derived for species with n-seeded fruits, are in accordance with expectations based on Hamiltonï¿½s inclusive fitness criteria. Competition between seeds is seen to be most intense when there are only two seeds, and decreases with increasing number of seeds, suggesting that two-seeded fruits would be rarer than one-seeded or many-seeded ones. Available data from a large number of plant species are consistent with this prediction of the model.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Indian Academy of Sciences.|
|Keywords:||Intrabrood conflict;sibling rivalry;brood reduction;cainism; seed-seed competition;evolutionarily stable strategy.|
|Department/Centre:||Division of Biological Sciences > Centre for Ecological Sciences|
|Date Deposited:||30 May 2011 09:08|
|Last Modified:||30 May 2011 09:08|
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