Parthenogenesis and, in particular, polyploidy are rare in animals. A number of cases are known among weevils. Previous models have assumed that parthenogenesis originated in a diploid lineage, involving first an automictic (meiotic) mechanism that then evolves into apomixis. New degrees of polyploi
POLYPLOIDY IN PARTHENOGENETIC CURCULIONIDAE
โ Scribed by ESKO SUOMALAINEN
- Book ID
- 114807314
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 654 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0018-0661
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The chromosomes of two Japanese weevils, Blosyrus japonicus Sharp and Callirhopalus (= Pseudocneorhinus) obesusRoelofs, were studied.The former consists of four races: one 2n and bisexual (= Blosyrusfalcatus Faust) and three parthenogenetic -4n, 5n, and 6n. In general the races are allopatric. The l
The chromosomes of a Japanese endemic weevil, Callirhopalus (= Pseudocneorhinus) bifasciatus Roelofs, were studied from several localities in Japan. All specimens were tetraploid and no males were found in any locality. The results indicate that the species reproduces parthenogenetically.