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- W2003530261 abstract "Summary The experimental laboratory pairing of hermaphroditic snails of different sub-species, Helix aspersa aspersa (H.a.a) and H. aspersa maxima (H.a.m.), made it possible to obtain both reciprocal hybrids for the first time and to describe their growth. The relatively small number of matings observed (20–25%) was partly responsible for the small number of clutches obtained (10–13%). The cross H.a.a.M × H.a.m.F is more fertile than the reciprocal. The observed tendency to reproductive isolation (behavioural and anatomical) suggests that H.a.a. and H.a.m. should be considered as two sub-species. Hybridization is not accompanied by a beneficial heterosis effect since significant juvenile mortality and an increased variation in growth were observed. The small size of H.a.a. is a dominant characteristic, whereas the colour of the mantle edge in the Fl individuals is intermediate between the black of H.a.m. and the white of H.a.a. The Fl generation is fertile and gives F2 snails with an adult size close to that of H.a.a. but slower growing. This approach allows investigations into the mechanisms underlying the reproductive isolation of parental sub-species." @default.
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- W2003530261 date "2001-12-01" @default.
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- W2003530261 title "Experimental hybridization between two sub-species of snails (Helix aspersa aspersaandHelix aspersa maxima): consequences for fertility, survival and growth" @default.
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- W2003530261 doi "https://doi.org/10.1080/07924259.2001.9652721" @default.
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