Direct and correlated responses to individual selection for large adult weight in the edible snailHelix aspersa M�ller

Autor:	J. Mallard, Mathilde Dupont-Nivet, J. C. Bonnet, J. M. Blanc
Rok vydání:	2000
Předmět:	Hibernation biology Ecology Hatching Helix (gastropod) Direct response General Medicine Snail Heritability biology.organism_classification Animal science Control line biology.animal Animal Science and Zoology Selection (genetic algorithm)
Zdroj:	Journal of Experimental Zoology. 287:80-85
ISSN:	1097-010X 0022-104X
DOI:	10.1002/1097-010x(20000615)287:1<80::aid-jez10>3.0.co;2-4
Popis:	A selection experiment for large adult weight based on individual performance was conducted for three generations in Helix aspersa aspersa. A second line was kept as an unselected control line. Direct response measured as deviation from the control line was 3.55 g after three generations of artificial selection, which averaged 13%. Realized heritability was 0.38 +/- 0.04. Correlated responses to selection showed a significant increase in weight after hibernation, mean egg weight and mean weight of newly-hatched snails with selection. For adult age, egg number, and hatching rate, no significant change correlated to selection was found, but this is to be confirmed.
Databáze:	OpenAIRE
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