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Natural Hybrid Populations between Chasmogamous and Cleistogamous Species, Ainsliaea faurieana and A. apiculata (Asteraceae; Mutisiae): Morphology, Cytology, Reproductive Mode and Allozyme Variation
Author(s) -
WATANABE KUNIAKI,
YAHARA TETSUKAZU,
KADOTA HIROSHI
Publication year - 1992
Publication title -
plant species biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 36
eISSN - 1442-1984
pISSN - 0913-557X
DOI - 10.1111/j.1442-1984.1992.tb00241.x
Subject(s) - biology , selfing , hybrid , pollen , asteraceae , botany , meiosis , ploidy , genetic variation , evolutionary biology , zoology , population , genetics , gene , demography , sociology
Abstract Ainsliaea apiculata is a cleistogamous perennial. This species occasionally hybridizes with A. faurieana on Yakushima Island, Japan and the hybrids are fertile. A cytological study of these hybrids revealed no irregularity in their male meiosis and the occurrence of genetic segregation through successful reproduction. Allozyme variation provided evidence for segregation through selfing in the hybrids. Observation on pollen grain number showed that these hybrids have cleistogamous flowers in various frequencies. Cleistogamy is dominantly inherited in the hybrids and selfing by cleistogamous flowers is considered to contribute to the formation of hybrid populations.