Download or read book Chromosome Variation in Natural Populations of Drosophila Mojavensis written by William Robert Johnson and published by . This book was released on 1973 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Esterases from Drosophila mojavensis written by Jan Pen and published by . This book was released on 1986 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Microbial Ecology of the Host Plants of Drosophila Mojavensis written by Don Carroll Vacek and published by . This book was released on 1979 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Genetic Relationships of the Sister Species Drosophila Mojavensis and Drosophila Arizonae and the Genetic Basis of Sterility in Their Hybrid Males written by and published by . This book was released on 2006 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cactophilic Drosophila mojavensis species group living in the deserts and dry tropical forests of the Southwestern United States and Mexico provides a valuable system for studies in diversification and speciation. My dissertation addresses a variety of evolutionary genetic questions using this system. Rigorous studies of the relationships between host races of D. mojavensis and the relationships among the members of the species group (D. mojavensis, D. arizona, and D. navojoa) are lacking. I used mitochondrial CO1 sequence data to address the phylogenetics and population genetics of this species group (Appendix A). In this study I have found that the sister species D. mojavensis and D. arizonae share no mitochondrial haplotypes and thus show no evidence for recent introgression. I estimate the divergence time between D. mojavensis and D. arizonae to be between 0.66 and 0.99 million years ago. I performed additional population genetic analyses of these species to provide a basis for future hypothesis testing. In Appendix B, I report the first example of substantial intraspecific polymorphism for genetic factors contributing to hybrid male sterility. I show that the occurrence of hybrid male sterility in crosses between Drosophila mojavensis and its sister species, D. arizonae is controlled by factors present at different frequencies in different populations of D. mojavensis. In addition, I show that hybrid male sterility is a complex phenotype; some hybrid males with motile sperm still cannot sire offspring. The large degree of variation between isofemale lines in producing sterile hybrid sons suggests a complex genetic basis to hybrid male sterility warranting quantitative genetic analysis. Since the genes underlying hybrid male sterility in these species are not yet fixed, I am able to perform explicit genetic analysis of this reproductive isolating mechanism. In Appendix C, I present the results of mapping QTL for hybrid male sterility within species. The genetic architecture underlying hybrid male sterility when analyzed directly in the F1 is highly complex. Thus, hybrid male sterility arises as a complex trait in this system and we propose a drift-based model for the evolution of this phenotype.
Download or read book Drosophila Inversion Polymorphism written by Costas B. Krimbas and published by CRC Press. This book was released on 1992-08-21 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inversion polymorphism in Drosophila has long served as a research subject for a variety of evolutionary studies and continues to be extremely important in understanding evolutionary principles today. Until now, no single volume has ever been assembled as a summary of this work. Drosophila Inversion Polymorphism provides background information, explores new and rigorous approaches to reconstructing phylogenetic relationships from inversion variation, and discusses inversion polymorphism in the six most studied species groups. Some chapters examine general principles and conclusions, some present detailed data sets (many of which have never before been published), and others offer detailed chromosome maps for identification. The book is a one-of-a-kind source of summary discussions and data ripe for analysis. Geneticists, evolutionary biologists, biologists, and all investigators researching inversion polymorphisms should consider Drosophila Inversion Polymorphism a "must-have" volume.
Download or read book Chromosomal Polymorphism in Natural Populations of the Desert Adapted Species Drosophila Mojavensis written by William Robert Johnson and published by . This book was released on 1980 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Host Preference Among Populations of Drosophila Mojavensis that Use Different Host Cacti written by Brian Dean Newby and published by . This book was released on 1996 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sexual Isolation Between Drosophila Mojavensis and Drosophila Arizonae written by and published by . This book was released on 2006 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sexual, or behavioral, isolation is a form of reproductive isolation that impedes gene flow between divergent taxa. In this study, sexual isolation was measured in a sister-species pair of North American cactophilic fruitflies. The results show that interspecific behavioral isolation is dependent upon the strain of origin of D. mojavensis, but is independent of the strain of origin of D. arizonae. Interspecific sexual isolation is greatest in crosses involving D. mojavensis from sympatry, which is consistent with reinforcement, and seems to be attributable to increased reluctance by D. mojavensis females and D. arizonae males to mate with heterospecifics. Contrary to previous studies, I found strong evidence for reproductive isolation between two strains of D. arizonae. The majority of the observed behavioral isolation seems to be the result of intraspecific, interpopulation encounters between females from Southeastern Mexico and males derived from the Northern population.
Download or read book Ecological and Evolutionary Genetics of Drosophila written by J.S.F. Barker and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecological and evolutionary genetics span many disciplines and virtually all levels of biological investigation, from the genetic information itself to the principles governing the complex organization of living things. The ideas and informa tion generated by ecological and evolutionary genetics provide the substance for strong inferences on the origins, changes and patterns of structural and functional organization in bio logical communi ties. It is the coordination of these ideas and thoughts that will provide the answers to many fundamental questions in biology. There is no doubt that Drosophilids provide strong model systems amenable to experimental manipulation and useful for testing pertinent hypotheses in ecological and evolutionary genetics. The chapters in this volume represent efforts to use Drosophila species for such a purpose. The volume consists of a dedication to William B. Heed, followed by four major sections: Ecological Genetics, Habitat Selection, Biochemical Genetics and Molecular Evolution. Each section is introduced by a short statement, and each chapter has an independent summary. The chapters contain the sub stance of talks given at a joint Australia-US workshop held January 5-10, 1989 at the University of New England, New South Wales, Australia. We are indebted to the Division of International Programs of the National Science Foundation (USA) and to the Science and Technology Collaboration Section of the Department of Industry, Technology and Commerce (Australia) for the provi sion of financial support under the US/Australia Science and Technology Agreement. Many people contributed to the preparation of this volume.
Download or read book Why Do Drosophila Mojavensis and D Arizonae Hybridize in the Laboratory But Not in Nature written by Jackson Hubbard Jennings and published by . This book was released on 2008 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selection for Increased Sexual Isolation Between Geographic Forms of Drosophila Mojavensis written by Helen Roberta Koepfer and published by . This book was released on 1984 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Esterases from Drosophila Mojavensis written by Jan Pen (chemia) and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transcription of the Alcohol Dehydrogenase Locus in Drosophila Mojavensis written by William Thomas Carroll and published by . This book was released on 1988 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reinforcement of Premating Barriers to Reproduction Between Drosophila Arizonae and Drosophila Mojavensis written by Gregory DeGroff Hocutt and published by . This book was released on 2000 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Sympatry Between Drosophila Arizonesis and Drosophila Mojavensis Baja written by James John Nagle and published by . This book was released on 1964 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Rearing Environment on Sexual Isolation Between Populations of Drosophila Mojavensis written by John Charles Brazner and published by . This book was released on 1983 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Genetic Study of the Variation in Abdominal Patterns in the Fruit Flies Drosophila Arizonensis and Drosophila Mojavensis written by Mary Cassandra Schlentz Truett and published by . This book was released on 1966 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
