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Dichogamy, Sex Allocation, and Mating System of Campanula microdonta and C. punctata
Author(s) -
Inoue Ken
Publication year - 1990
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.1442-1984.1990.tb00179.x
Subject(s) - outcrossing , biology , selfing , inbreeding , gynoecium , mating system , stamen , population , mating , sex allocation , inbreeding depression , botany , zoology , pollen , demography , genetics , offspring , pregnancy , sociology
Dichogamy and sex allocation in several populations of Campanula microdonta and C. punctata were investigated with regard to their mating systems. Duration of the staminate phase differed among the populations: staminate phase was longer in self‐compatible (SC) and largely outcrossing populations than in self‐incompatible (SI) and outcrossing populations or in SC and largely inbreeding populations. Duration of the pistillate phase among the populations was less variable than duration of the staminate phase. Male reproductive effort decreased with increase of the estimated selfing rates. Male allocation (weight ratio of androecium to gynoecium or to total flower) may be used as an indicator of the breeding system. Within each population, small flowers allocate proportionately more resources to the androecium than to the gynoecium. Among populations, SC outcrossing populations tend to produce large ovaries, and SC inbreeding populations tend to produce small ovaries.