Heritability of male outcrossing ability in the simultaneous hermaphrodite, Bulinus truncatus (Gastropoda

Planorbidae)

Stephanie J. Schrag, D. Rollinson, Anne E. Keymer, Andrew Fraser Read

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The heritability of phally, a dichotomous trait defined by the functional state of the male reproductive tract, was measured in a laboratory population of the simultaneous hermaphrodite snail Bulinus truncatus by means of a breeding experiment and a selection experiment. Euphallic individuals develop a fully functional male and female tract and are capable of receiving and donating sperm. In aphallic individuals the male tract does not develop fully, preventing sperm donation. There was no evidence of a heritable component to phally in the breeding experiment, but the selection experiment demonstrated a slight heritable effect. In both experiments there was more variation in the observed proportion of euphallics than expected by chance alone and no evidence of line or family effects, implicating environmental determination of male outcrossing ability even under controlled laboratory conditions. Previous studies of populations of B. truncatus reported that the proportion of euphallics was under strong genetic control. We suggest that there may be population differences in the extent of environmental control over phally, analogous to that reported for sex determination.

Original languageEnglish (US)
Pages (from-to)311-319
Number of pages9
JournalJournal of Zoology
Volume226
Issue number2
DOIs
StatePublished - Jan 1 1992

Fingerprint

Bulinus truncatus
Planorbidae
hermaphrodite
outcrossing
heritability
Gastropoda
experiment
sperm
spermatozoa
breeding
sex determination
snails
environmental effect
snail
gender

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

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title = "Heritability of male outcrossing ability in the simultaneous hermaphrodite, Bulinus truncatus (Gastropoda: Planorbidae)",
abstract = "The heritability of phally, a dichotomous trait defined by the functional state of the male reproductive tract, was measured in a laboratory population of the simultaneous hermaphrodite snail Bulinus truncatus by means of a breeding experiment and a selection experiment. Euphallic individuals develop a fully functional male and female tract and are capable of receiving and donating sperm. In aphallic individuals the male tract does not develop fully, preventing sperm donation. There was no evidence of a heritable component to phally in the breeding experiment, but the selection experiment demonstrated a slight heritable effect. In both experiments there was more variation in the observed proportion of euphallics than expected by chance alone and no evidence of line or family effects, implicating environmental determination of male outcrossing ability even under controlled laboratory conditions. Previous studies of populations of B. truncatus reported that the proportion of euphallics was under strong genetic control. We suggest that there may be population differences in the extent of environmental control over phally, analogous to that reported for sex determination.",
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Heritability of male outcrossing ability in the simultaneous hermaphrodite, Bulinus truncatus (Gastropoda : Planorbidae). / Schrag, Stephanie J.; Rollinson, D.; Keymer, Anne E.; Read, Andrew Fraser.

In: Journal of Zoology, Vol. 226, No. 2, 01.01.1992, p. 311-319.

Research output: Contribution to journalArticle

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