Electrophoretic studies of meiotic segregation in inter- and intraspecific hybrids among East Asian species of the genusOryzias (Pisces: Oryziatidae)
✍ Scribed by Sakaizumi, Mitsuru ;Shimizu, Yasushi ;Hamaguchi, Satoshi
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 704 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0022-104X
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✦ Synopsis
Abstract
Three species of Oryzias, namely, O. curvinotus, O. luzonensis, and four subspecific groups of O. latipes, have been found in East Asia. In order to elucidate the genetic relationships among theses species, fertility and meiotic segregation in hybrids were examined. Fertile males and females and normal segregation were observed in intraspecific crosses of O. latipes and in interspecific hybrids between O. luzonensis and O. curvinotus. By contrast, male sterility and production of non‐reductional 2nd eggs by female were observed in interspecific crosses between O. latipes and O. curvinotus. Similar results were obtained with luzonensis‐latipes hybrids. These results demonstrated that O. luzonensis and O. curvinotus are closely related, and that reproductive isolation is complete between O. latipes and O. luzonensis and between O. latipes and O. curvinotus. © 1992 Wiley‐Liss, Inc.