Breeding systems and pollination in Vigna minima (Leguminosae, Papilionoideae)

Chandrasekhar Gopinathan, Mambully ; Babu, Cherukuri Ragavendra (1987) Breeding systems and pollination in Vigna minima (Leguminosae, Papilionoideae) Plant Systematics and Evolution, 156 (3-4). pp. 117-126. ISSN 0378-2697

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Four types of floral breeding systems—(i) chasmogamy, (ii) aerial pseudocleistogamy, (iii) subterranean pseudocleistogamy and (iv) obligate subterranean true cleistogamy—are observed in the populations of Vigna minima inhabiting the Western Ghats (India). Five categories of phenotypes are recognized based on the number and kinds of floral breeding systems found in a given individual. The frequencies of different categories of phenotypes not only show intra- and interpopulation variation, but also fluctuate from generation to generation suggesting differences in the genetic structure of populations. This polymorphism in the breeding system of a single species is unique and may be adaptive. Obligate subterranean true cleistogamy and amphicarpy appear to be adaptations to jungle fires and soil erosion.—The flowers are of the flag-blossom type and insect visitors act as tripping agents. The tripping mechanism together with the polymorphic floral breeding system result in a balanced mixture of selfing and outcrossing. Such a recombination system may enhance the fitness of V. minima which is essentially a colonizing species.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Angiosperms; Leguminosae ; Papilionoideae ; Vigna minima ; Polymorphism; Floral Breeding Systems; Pollination
ID Code:69316
Deposited On:12 Nov 2011 09:53
Last Modified:12 Nov 2011 09:53

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