Differing amounts of genetic polymorphism in testes and male accessory glands ofDrosophila melanogaster andDrosophila simulans |
| |
Authors: | Michael B. Coulthart Rama S. Singh |
| |
Affiliation: | (1) Department of Biology, McMaster University, L8S 4K1 Hamilton, Ontario, Canada;(2) Present address: Department of Biochemistry, Dalhousie University, B3H 4H7 Halifax, Nova Scotia, Canada |
| |
Abstract: | We surveyed genetic polymorphism by two-dimensional gel electrophoresis of male reproductive tract proteins in 20 isofemale lines each ofDrosophila melanogaster andDrosophila simulans. After classifying 244 such proteins ofDrosophila melanogaster and 271 ofDrosophila simulans by their distribution between testes and accessory glands within the reproductive tract, significant correlations were found between genetic polymorphism and tissue distribution. In both species, gland-specific proteins were significantly more polymorphic than testis-specific proteins, as well as those found in both testes and glands. Simultaneously, inDrosophila simulans, proteins found in roughly equivalent relative abundance in both testes and glands were significantly less variable than gland-specific and testis-specific proteins, as well as those with a quantitative difference in relative abundance between testes and glands. These correlations may reflect general differences in variability between extracellular and intracellular proteins and between proteins with broad as opposed to tissue-specific distributions.We thank the Natural Sciences and Engineering Research Council of Canada for financial support (Grant A0235 to R.S.S.). |
| |
Keywords: | Drosophila melanogaster Drosophila simulans polymorphism gland-specific proteins testis-specific proteins |
本文献已被 SpringerLink 等数据库收录! |
|