Interactive Effects Of Geography And Host Plant Species On Genetic And Phenotypic Variation Of Cotton Fleahopper Populations
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Interactive Effects Of Geography And Host Plant Species On Genetic And Phenotypic Variation Of Cotton Fleahopper Populations
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Author : Apurba Kumar Barman
language : en
Publisher:
Release Date : 2012
Interactive Effects Of Geography And Host Plant Species On Genetic And Phenotypic Variation Of Cotton Fleahopper Populations written by Apurba Kumar Barman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The cotton fleahopper, Pseudatomoscelis seriatus (Reuter) is a widely distributed insect across the United States. Although, it feeds on several native wild hosts, its agricultural importance lies as an economic pest of cotton in several states in the southern United States. No studies have addressed intraspecific genetic and phenotypic variation of this insect pest at a large geographic scale. I examined genetic variation among cotton fleahopper populations associated with cotton in different geographic locations across the southern United States (Chapter II). Using dominant, neutral, nuclear molecular markers (AFLP, amplified fragment length polymorphism) and mitochondrial DNA sequences, I found that overall genetic differentiation among different geographic populations, collected from cotton in eleven cotton growing states, was low but significant. AFLP revealed the presence of three regional groups representing western (Arizona), central (Texas, Oklahoma, Arkansas, Louisiana, Mississippi and Alabama), and eastern (Florida, Georgia, South Carolina and North Carolina) populations. I examined if there were distinct lineages of cotton fleahoppers associated with three of its host plant species: cotton (Gossypium hirsutum), horsemint (Monarda punctata) and woolly croton (Croton capitatus) in five different locations of Texas by using AFLP markers (Chapter III). I found two distinct host-associated lineages at three locations and local panmixia in the other two locations. I tested if host preference of cotton fleahoppers were affected by geographic variation and prior experience. Conducting choice tests with a Y-tube olfactometer, I found that host preference in cotton fleahoppers for horsemint (one of its native host plants) is conserved and unaffected by individual?s prior experience with cotton (Chapter IV). Finally, I explored the role of host-plant species in morphological differentiation of the cotton fleahopper in two locations that differ in presence of distinct host-associated lineages. Using a geometric-morphometric approach, I detected significant effect of host plant and geography on body morphology and wing shape of cotton fleahopper populations (Chapter V). Length of antenna and rostrum were two important traits associated with morphological divergence of cotton and horsemint associated insect populations. Cotton associated individuals had relatively longer antenna and rostrum compared to individuals associated with horsemint.
Bibliography Of Agriculture
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Author :
language : en
Publisher:
Release Date : 1990-04
Bibliography Of Agriculture written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990-04 with Agriculture categories.
Bibliography Of Agriculture
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Author :
language : en
Publisher:
Release Date : 1990
Bibliography Of Agriculture written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Agriculture categories.
Behaviour And Ecology Of Spiders
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Author : Carmen Viera
language : en
Publisher: Springer
Release Date : 2017-11-02
Behaviour And Ecology Of Spiders written by Carmen Viera and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-02 with Science categories.
Within the last few decades, arachnology in the Neotropical region has experienced a great development filling the knowledge gap in one of the most diverse regions of the world. Nevertheless, large geographical areas remain poorly sampled, especially within the Amazon, and new genera and species have been continuously discovered, even in urban areas. In congruence with the recent improvements in research, several aspects of the ecology, behaviour and natural history of spiders, such as interactions with other predators and parasitoids, social interactions, dispersal patterns, habitat requirements, mating behaviors, among others, are being carefully investigated. These recent contributions incorporate substantial information on the preexisting knowledge on these subjects every year. Our main objective with this book is to present a summary on these new researches and on the currently knowledge on the main subjects involved in the general theme, emphasizing the contribution of the rich fauna of the Neotropical region to the research of behaviour and ecology of the spiders.
The Cotton Fleahopper
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Author :
language : en
Publisher:
Release Date : 1960
The Cotton Fleahopper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Cotton categories.
Integrated Pest Management
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Author : Rajinder Peshin
language : en
Publisher: Springer
Release Date : 2009-04-29
Integrated Pest Management written by Rajinder Peshin and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-04-29 with Science categories.
This interdisciplinary text offers updated knowledge on pest management. It discusses dissemination and impact on a range of crops across the globe on industrialized and subsistence level farms. It also explores the effect of the green revolution on IPM.
Challenge Grants Program
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Author :
language : en
Publisher:
Release Date : 1991
Challenge Grants Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Humanities categories.
Integrated Pest Management Of Tropical Vegetable Crops
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Author : Rangaswamy Muniappan
language : en
Publisher: Springer
Release Date : 2016-11-23
Integrated Pest Management Of Tropical Vegetable Crops written by Rangaswamy Muniappan and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-23 with Technology & Engineering categories.
It is an edited book with chapters written by multi-disciplinary specialists in their specific subject areas. It covers development of IPM components and packaging them for individual vegetable crops specifically targeted to tropical countries. Scientific background for IPM components or tactics will be included. There will be case studies of IPM packages developed and implemented in different countries. The concept of IPM has been in existence for the past six decades; however, a practical holistic program has not been developed and implemented for vegetable crops, in the developing countries. Currently the IPM adoption rate in the tropics is minimal and there is a need for implementation of IPM technologies that are environmentally safe, economical, and socially acceptable. We believe that adoption and implementation of IPM provided in this book will lead to significant reduction in crop losses and mitigate adverse impacts of pesticide use in the tropics. This book is an outcome 20 years of research, development and implementation of the IPM CRSP, a project supported by USAID and administered by Virginia Tech in several developing countries along the tropical belt in Africa, Asia, Latin America and the Caribbean.
Ecological Speciation
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Author : Patrik Nosil
language : en
Publisher: OUP Oxford
Release Date : 2012-03-15
Ecological Speciation written by Patrik Nosil and has been published by OUP Oxford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03-15 with Science categories.
The origin of biological diversity, via the formation of new species, can be inextricably linked to adaptation to the ecological environment. Specifically, ecological processes are central to the formation of new species when barriers to gene flow (reproductive isolation) evolve between populations as a result of ecologically-based divergent natural selection. This process of 'ecological speciation' has seen a large body of particularly focused research in the last 10-15 years, and a review and synthesis of the theoretical and empirical literature is now timely. The book begins by clarifying what ecological speciation is, its alternatives, and the predictions that can be used to test for it. It then reviews the three components of ecological speciation and discusses the geography and genomic basis of the process. A final chapter highlights future research directions, describing the approaches and experiments which might be used to conduct that future work. The ecological and genetic literature is integrated throughout the text with the goal of shedding new insight into the speciation process, particularly when the empirical data is then further integrated with theory.
True Bugs Heteroptera Of The Neotropics
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Author : Antônio R. Panizzi
language : en
Publisher: Springer
Release Date : 2015-09-29
True Bugs Heteroptera Of The Neotropics written by Antônio R. Panizzi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-09-29 with Science categories.
True bugs (Heteroptera) are a diverse and complex group of plant-feeding and predatory insects important to food production, human health, the global economy and the environment. Within the nearly 43,000 species described around the world, Neotropical true bugs are particularly diverse, and much remains to be discovered about their biology and relations with other species. Inspired by the need for a comprehensive assessment, True Bugs (Heteroptera) of the Neotropics is the most complete and thorough review ever published. Experts in each of the seven infraorders have drawn together the scattered literature to provide detailed treatments of each major taxon. The most common and important species as well as select lesser known species in each major family are covered, highlighting morphology, classification, biology and ecology. The numerous color illustrations highlight key species and their adaptations, and importance to basic and applied sciences is discussed. Each chapter is based on an up-to-date review of the literature, and with a bibliography of more than 3,000 references, readers are presented with an unprecedented and vital and timely account of the true bugs of the Neotropical Region.