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項次 書目
1
題名:Cooption of Neo-X and Neo-Y Chromosomes in Drosophila albomicans    
著者:Sung-Han LinYu-Yang HuangHwei-Yu Chang
出版地區:台灣
出版城市:台北市
學科:生命科學 ; 醫學綜合
關鍵字:Coevolution ; Drosophila nasuta ; Hybrids ; Sex chromosome
刊名:Zoological Studies
頁碼:293-301
語言:英語
摘要: 英文摘要PDF

Drosophila nasuta has 8 chromosomes, whereas its sibling species D. albomicans has 6 because a pair of neo-sex chromosomes has evolved through fusion events in <0.5 Ma. It remains unclear how the newly joined sex chromosomes differentiated from their homologous 3rd autosome of D. nasuta. The body size of F1 hybrid males from a cross between D. albomicans males and D. nasuta females was significantly smaller than those of the parental species, but an intermediate size was obtained from the reciprocal cross. There are 2 possible explanations: (1) the ancestral mitochondria of D. nasuta are not compatible in the derived D. albomicans nuclear environment; and (2) the neo-Y chromosome cannot work well with the homologous ancestral 3rd autosome of D. nasuta. In the present study, experiments were conducted to exclude the possible involvement of mitochondrial incompatibility. We established 5 sets of coupled highly inbred D. albomicans strains and another 5 sets of D. nasuta strains, and subsequently examined their reproductive ability and the body size of their progeny. Each set of coupled strains had nearly the same homogeneous nuclear genome but had different (self vs. non-self) mitochondria. These coupled strains showed indistinguishable reproductive ability and body size between them, indicating that mitochondrial compatibility was not the major cause. Alternatively, our cross experiments demonstrated that the body size of the offspring reverted to normal when the neo-X and neo-Y relationships were restored by backcrossing the small F1 males to D. albomicans females. However, the body size remained small when F1 males were backcrossed to D. nasuta. The backcross results support the 2nd explanation, thus implying that after coevolution of the neo-sex chromosomes, the neo-Y may depend on the presence of the neo-X chromosome in males, but not vice versa.


    

本卷期目次
Zoological Studies
Effects of Troop Size on Social Relations among Male Formosan Macaques, Macaca cyclopis/ Tai-Jung LinGovindasamy AgoramoorthyChih-Chien HuangMinna J. Hsu
Description of Adults, Preimaginal Phases, and the Venom Apparatus of a New Species of Aspilota Forster from Spain (Hymenoptera: Braconidae)/ Maximilian FischerJosep TormosXavier PardoJosep Daniel Asis
Spatial and Seasonal Variations in Chaetognath Assemblages in Two Subtropical Marine Inlets with Different Hydrographical Characteristics/ Pan TseSami SouissiJiang-Shiou HwangQing-Chao ChenChong Kim Wong
Factors Affecting Invasive Species Abundance: The Barbary Ground Squirrel on Fuerteventura Island, Spain/ Marta Lopez-DariasJorge M. Lobo
Construction of an Indian Muntjac BAC Library and Production of the Most Highly Dense FISH Map of the Species/ Chyi-Chyang LinPei-Ching HsuTzai-Shiuan LiShu-Ju LiaoYa-Ming ChengLie-Jiau HsiehYueh-Chun Li
Cooption of Neo-X and Neo-Y Chromosomes in Drosophila albomicans/ Sung-Han LinYu-Yang HuangHwei-Yu Chang
Development of Ovarian Tissue and Female Germ Cells in the Protandrous Black Porgy, Acanthopagrus schlegeli (Perciformes, Sparidae)/ Mong-Fong LeeJing-Duan HuangChing-Fong Chang
A Sea Anemone Outbreak Eliminates Damselfish Territories from Fringing Reefs in Southern Taiwan/ Tsen-Chien ChenCheng-Tze HoRong-Quen Jan
Sexual Polymorphism in a Population of Strombus canarium Linnaeus, 1758 (Mollusca: Gastropoda) at Merambong Shoal, Malaysia/ Zaidi Che CobAziz ArshadMohd Hanafi IdrisJapar Sidik BujangMazlan Abd Ghaffar
Apocyclops ramkhamhaengi sp. nov. (Copepoda: Cyclopoida) in a Culture Originating from Brackish Waters of Chang Island, Trat Province, Thailand/ Supawadee ChullasornPawana KangtiaKhwanruan PinkaewFrank D. Ferrari
Multi-Gene Analyses of the Phylogenetic Relationships among the Mollusca, Annelida, and Arthropoda/ Donald J. ColganPatricia A. HutchingsEmma Beacham
Differences in Morphological Traits between Two Sibling Species, Drosophila ananassae and D. pallidosa/ Chavali VishalakshiBashisth Narayan Singh
Mitochondrial DNA Diversity of Tor tambroides Valenciennes (Cyprinidae) from Five Natural Populations in Malaysia/ Yuzine B. EsaSiti Shapor SirajSiti Khalijah DaudKhairul Adha A. RahimJeffrine Rovie Ryan JapningSoon Guan Tan
Molecular Phylogenetics among Three Families of Bats (Chiroptera: Rhinolophidae, Hipposideridae, and Vespertilionidae) Based on Partial Sequences of the Mitochondrial 12S and 16S rRNA Genes/ Xiao-Ming GuShu-Yan HeLei Ao
 
   
 
   

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