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Laboratory Synthesis of a Pseudogamous Triploid 'Species' of the Genus Muellerianella (Homoptera, Delphacidae)

Sakis Drosopoulos
Evolution
Vol. 32, No. 4 (Dec., 1978), pp. 916-920
DOI: 10.2307/2407505
Stable URL: http://www.jstor.org/stable/2407505
Page Count: 5
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Abstract

The wild M -2-fairmairei-brevipennis appeared to have two genomes of M. fairmairei and one of M. brevipennis In order to confirm this hypothesis reciprocal crosses involving different populations were made between the two biparentally reproducing species; these were followed by a cytological study of the hybrids. The only successful process of crosses which resulted in the synthesis of the triploid pseudogamous species was as follows: hybrid progeny produced by crossing the diploid species, Muellerianella fairmairei ♀ ♀ M. brevipennis ♂ ♂ Backcrosses of the F1 females to M. fairmairei produced only a few progeny, of which all were triploid females. Backcross of0 these females to M. fairmairei produced numerous matromorphous progeny very similar to the wild pseudogamous triploid 'species' of M -2-fairmairei-brevipennis

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