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- W2019016421 abstract "Abstract A combination of ecological and biochemical genetic data was used to investigate the effects of genotype on sex determination in the asexually viviparous sea anemone Actinia tenebrosa. A survey of 13 Australian local populations of A. tenebrosa revealed, that sex ratios were typically significantly biased towards either males or females, and male-biased ratios were more common. This species is apparently dioecious. No simultaneous hermaphrodites were detected in dissections of 617 sexually mature anemones, and sex ratios were found to maintain a consistent bias, both within and among breeding seasons, for each of seven local populations. Male, female, and nonsexual adults were found to contain broods. The results of a reciprocal-transplantation experiment, involving genotypes from each of three local populations, supported the hypothesis, that sex of each clone is determined by its genotype and not by local environmental conditions. The bias of sex ratios within groups of anemones, which shared a four-locus genotype, were unaffected by local environmental conditions in the year following transplantation. Furthermore, the sex ratios within nine of 10 groups, which shared a common four-locus genotype (n ⩾ 9), were significantly biased towards either males or females, and three of these groups were unisexual. It is concluded, that sex in A. tenebrosa is genetically determined, and that this species is most likely to reproduce asexually through internal budding, and use sexual reproduction to produce nonbrooded colonists." @default.
- W2019016421 created "2016-06-24" @default.
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- W2019016421 date "1988-04-01" @default.
- W2019016421 modified "2023-09-27" @default.
- W2019016421 title "Evidence for genetic determination of sex in Actinia tenebrosa" @default.
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- W2019016421 doi "https://doi.org/10.1016/0022-0981(88)90243-2" @default.
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