APOMICTIC PARTHENOGENESIS IN A HERMAPHRODITIC TERRESTRIAL SLUG,DEROCERAS LAEVE(MÜLLER)

Autor:	Richard J. Hoffmann, Nancy L. Nicklas
Rok vydání:	1981
Předmět:	biology Slug media_common.quotation_subject Zoology Outcrossing Parthenogenesis biology.organism_classification Deroceras laeve Loss of heterozygosity Apomixis Botany Allele Reproduction General Agricultural and Biological Sciences media_common
Zdroj:	The Biological Bulletin. 160:123-135
ISSN:	1939-8697 0006-3185
DOI:	10.2307/1540906
Popis:	Electrophoretic studies and breeding experiments show that the terrestrial pulmonate slug, Deroceras laeve, usually reproduces by apomictic parthenogenesis, although reciprocal outcrossing in complete hermaphrodites occurs occasionally. The sexual status of the species is controlled by the environment, with low temperatures and/or exposure to light inhibiting the development of male organs. Both hermaphrodites and females reproduce parthenogenetically. Sampling of an artificially established field population suggests that apomixis is also the rule in nature, and surveys of natural populations reveal that most populations consist of only a single clone, based on genetic identity at 20 enzyme loci. In spite of apomictic reproduction there is little heterozygosity in nature, although there is some allelic variation between populations.
Databáze:	OpenAIRE
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