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T he mating system and relative performance of selfed and outcrossed progeny in A rabis fecunda (B rassicaceae )
Author(s) -
Hamilton Matthew B.,
MitchellOlds Thomas
Publication year - 1994
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1994.tb11446.x
Subject(s) - inbreeding depression , biology , outcrossing , selfing , inbreeding , self pollination , mating , human fertilization , dry weight , pollination , botany , zoology , mating system , outbreeding depression , horticulture , agronomy , ecology , population , pollen , demography , sociology
We estimated rates of self‐fertilization and inbreeding depression in the hermaphroditic perennial Arabis fecunda. Crosses were made on mesh‐bagged wild plants, yielding 12 plants producing self‐, outcross‐, and naturally fertilized seeds that were then grown in a greenhouse. Analysis of variance indicated aboveground dry weight at 160 days differed among pollination treatments, but mean seed weight, number of seeds per fruit, and days to germination did not. For dry weight, selfed progeny have 9.4% reduction and naturally pollinated progeny a 3.7% reduction compared to outcrossed progeny, suggesting a 39% selling rate in Arabis. Significant inbreeding depression and a mixed mating system are evidence that the deleterious effects of self‐fertilization are maintained through high rates of mildly deleterious mutation. Significant maternal‐parent‐by‐pollination‐treatment interactions for mean seed weight and dry weight are consistent with inbreeding depression caused by deleterious recessives and varying past maternal inbreeding.