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Melhoramento Genetico Da Mandioca V Criterio De Selecao
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Book Synopsis Melhoramento genético da mandioca V. Critério de seleção by : A. Bueno
Download or read book Melhoramento genético da mandioca V. Critério de seleção written by A. Bueno and published by . This book was released on 1986 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A biologia floral e o modo de polinização fazem da mandioca (Manihot esculenta Crantz) uma espécie predominantemente alógama, que sofre grande depressão de vigor quando autofecundada. Estas características peculiares e a propagação vegetativa empregada na cultura, determinam que os clones existentes sejam altamente heterozigotos. Em vista disso, a segregação ocorre na primeira geração após a hibridação, época em que se seleciona os genótipos superiores. Alguns clones apresentam baixa intensidade de floração e em condições ambientais sub-ótimas a germinação das sementes verdadeiras ocorre a taxas reduzidas. Mesmo assim, a experiência mostra que para a maioria dos cruzamentos e possível produzir um elevado número de genótipos segregantes. A eficiência da seleção na geração segregante é um aspecto de suma importância, com implicações científicas e econômicas no desenvolvimento dos programas de melhoramento da mandioca e depende fundamentalmente da herdabilidade do caráter a ser selecionado e do mecanismo utilizado para identificá-lo. A seleção é eficiente para caracteres de alta herdabilidade e fácil identificaçao, como a resistência a Bacteriose, mas pode ser problemática para atributos de baixa herdabilidade, como a maioria das características agronômicas de importância. Em geral, o aumento do rendimento de raízes é o principal objetivo da maioria dos programas de melhoramento de mandioca. Assim sendo, é necessário que os genótipos identificados como superiores em relação ao rendimento de raízes, na geração segregante, conservem esta superioridade nos futuros ciclos de propagação vegetativa.
Book Synopsis Melhoramento Genetico Da Mandioca e Seleção Participativa by : José Marini
Download or read book Melhoramento Genetico Da Mandioca e Seleção Participativa written by José Marini and published by . This book was released on 2017-08-29 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geralmente, os programas convencionais de melhoramento gen�tico de plantas, desenvolvidos em bases experimentais sob condi��es �ltimas de cultivo, s�o bastante efetivos para aqueles agricultores que cultivam em ambientes favor�veis, ou que utilizam tecnologias de acordo com as exig�ncias da variedade. Para os pequenos agricultores de mandioca, que se dedicam � agricultura de subsist�ncia, ocupam �reas marginais e t�m pouco ou nenhum acesso a novas tecnologias, os programas de melhoramento convencional n�o t�m demonstrado os impactos desejados pela pesquisa. Este livro vai orientar como se proceder a tecnicas de melhoramento da cultura de forma que seja aceita e adotada por todos os agricultores.
Download or read book Mandioca written by W. M. G. Fukuda and published by . This book was released on 1996 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Este trabalho tem objetivo discutir de uma forma geral as estrategias para um programa de melhoramento genetico de mandioca, incluindo seus objetivos gerais e especificos, bem como as metodologias mais utilizadas no momento. Sao apresentados os pricipais fatores bioticos e abioticos que afetam a cultura da mandioca em cada ecossistema e as demandas por novas variedades, em funcao da finalidade de exploracao do cultivo e das preferencias dos produtores. No que se refere a metodologia, sao apresentados esquemas gerais de avaliacao e selecao de variedades e hibridos, bem como as tecnicas de hibridacao e o manejo das sementes e 'seedlings'. Sao discutidos ainda os principais parametros de avaliacao e os criterios de selecao utilizados de acordo com os ... objetivos do programa, o seu estagio de desenvolvimento e as preferencias dos produtores.
Book Synopsis Melhoramento genético da mandioca by : A. Bueno
Download or read book Melhoramento genético da mandioca written by A. Bueno and published by . This book was released on 1986 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mandioca (Manihot esculenta Crantz) é cultivada na maioria dos países tropicais e subtropicais compreendidos entre 30° N e 30° S de latitude. Adapta-se bem as mais diversas condições ambientais e sistemas de cultivo, proporcionando produtividade razoável com a utilização mínima de insumos e tecnologias modernas. Após o seu estabelecimento em campo, tolera períodos prolongados de estiagem e sob condições favoráveis pode recuperar-se rapidamente do ataque de pragas e doenças. Embora esta cultura possua uma gama de atributos desejáveis, existem vários problemas agronômicos que podem limitar a sua produtividade. Entre as doenças que atacam a mandioca, a que causa danos econômicos mais relevantes é a Bacteriose causada pela bactéria Xanthomonas manihotis. No Brasil, esta doença assume importância nas regiões Sul, Sudeste e Centro Oeste.
Book Synopsis Pesquisa participativa em melhoramento de mandioca by : E. E. Montenegro
Download or read book Pesquisa participativa em melhoramento de mandioca written by E. E. Montenegro and published by . This book was released on 1995 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Apesar da otencao de clones potencialmente superiores as variedades tradicionais, pelo programa de melhoramento genetico de mandioca, observa-se que a maioria dos produtores continuam plantando as mesmas variedades que eles selecionaram durante varios anos, devido as variedades melhoradas naoa atenderem as demandas dos produtores e consumidores de amndioca. Ao que parece, nao e suficiente altos rendiemntos e resistencia a pragas e doencas, para lograr uma rapida adocao no cultivo da mandioca, pois ha variedades amplamente difundidas nas areas de cultivo do pais com valores de producao inferiores a alguns dos materiais oferecidos pelos programas de melhoramento, evidenciando a existencia de "criterios de selecao" como fator importante no desenvolvimento tecno logico. A Metodolia de Pesquisa Participativa em Melhoramento de mandioca-PPMM complementara a pesquisa tardicional, estabelecendo uma retroalimentacao de informacoes entre: produtores, extensionistas e pesquisadores, maximizando a eficiencia da selecao de variedades, assegurando maior aceitacao e adocao dos clones melhorados.
Book Synopsis Fertilizing for High Yield and Quality by : Lindbergue Araújo Crisóstomo
Download or read book Fertilizing for High Yield and Quality written by Lindbergue Araújo Crisóstomo and published by . This book was released on 2007 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acerola; Banana; Cashew: dwarf variety; Citrus; Coconut: green dwarf variety; Guava; Mango; Papaya; Passion-fruit; Pineapple; Soursop.
Book Synopsis Biotechnology of Fruit and Nut Crops, 2nd Edition by : Richard E. Litz
Download or read book Biotechnology of Fruit and Nut Crops, 2nd Edition written by Richard E. Litz and published by CABI. This book was released on 2020-01-29 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the biotechnology of all the major fruit and nut species. Since the very successful first edition of this book in 2004, there has been rapid progress for many fruit and nut species in cell culture, genomics and genetic transformation, especially for citrus and papaya. This book covers both these cutting-edge technologies and regeneration pathways, protoplast culture, in vitro mutagenesis, ploidy manipulation techniques that have been applied to a wider range of species. Three crop species, Diospyros kaki (persimmon), Punica granatum (pomegranate) and Eriobotrya japonica (loquat) are included for the first time. The chapters are organized by plant family to make it easier to make comparisons and exploitation of work with related species. Each chapter discusses the plant family and the related wild species for 38 crop species, and has colour illustrations. It is essential for scientists and post graduate students who are engaged in the improvement of fruit, nut and plantation crops.
Download or read book Animal Nutrition written by Philip Hynd and published by CSIRO PUBLISHING. This book was released on 2019-11-01 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutrition is the key driver of animal health, welfare and production. In agriculture, nutrition is crucial to meet increasing global demands for animal protein and consumer demands for cheaper meat, milk and eggs and higher standards of animal welfare. For companion animals, good nutrition is essential for quality and length of life. Animal Nutrition examines the science behind the nutrition and feeding of the major domesticated animal species: sheep, beef cattle, dairy cattle, deer, goats, pigs, poultry, camelids, horses, dogs and cats. It includes introductory chapters on digestion and feeding standards, followed by chapters on each animal, containing information on digestive anatomy and physiology, evidence-based nutrition and feeding requirements, and common nutritional and metabolic diseases. Clear diagrams, tables and breakout boxes make this text readily understandable and it will be of value to tertiary students and to practising veterinarians, livestock consultants, producers and nutritionists.
Author :Silvio Silvério da Silva Publisher :Springer Science & Business Media ISBN 13 :3319050206 Total Pages :441 pages Book Rating :4.3/5 (19 download)
Book Synopsis Biofuels in Brazil by : Silvio Silvério da Silva
Download or read book Biofuels in Brazil written by Silvio Silvério da Silva and published by Springer Science & Business Media. This book was released on 2014-04-02 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the commercialization of biofuels and the Brazilian government policies for the promotion of renewable energy program in Brazil, which could be a learning module for several countries for implementing biofuels policy to improve their socioeconomic status and make them energy independent. Researchers in academia and industries, policy makers, and economic analysts will be assisted by important source of information in their ongoing research and future perspectives. This book will benefit graduate and postgraduate students of chemical and biochemical engineering, forestry, microbiology, biochemistry, biotechnology, applied chemistry, environmental science, sustainable energy, and biotech business disciplines by signifying the applied aspects of bioenergy production from various natural sources and their implications. Graduate and postgraduate students as well as postdoctoral researchers will find clear concepts of feedstock analysis, feedstock degradation, microbial fermentation, genetic engineering, renewable energy generation and storage, climate changes, and techno-economic analysis of biofuels production technologies.
Download or read book Passiflora written by Torsten Ulmer and published by Timber Press (OR). This book was released on 2004 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: As lushly illustrated as it is informative, this book reveals the immense variation found among members of this extraordinary genus.
Book Synopsis Principles for Building Resilience by : Reinette Biggs
Download or read book Principles for Building Resilience written by Reinette Biggs and published by Cambridge University Press. This book was released on 2015-04-02 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the very latest research, this book provides an in-depth review of the role of resilience in the management of social-ecological systems and the ecosystem services they provide. Leaders in the field outline seven principles for building resilience in social-ecological systems, examining how these can be applied to advance sustainability.
Book Synopsis Natural Enemies of Insect Pests in Neotropical Agroecosystems by : Brígida Souza
Download or read book Natural Enemies of Insect Pests in Neotropical Agroecosystems written by Brígida Souza and published by Springer. This book was released on 2021-01-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to address the importance of natural enemies and functional diversity for biological control in Neotropical agroecosystems. Several aspects related to the conservation of natural enemies, such as vegetation design and climate change, are discussed in Part 1 and the bioecology of several insects groups used in biological control in Latin America is presented in Part 2. Part 3 is devoted to mass production of natural enemies while Part 4 describes how these insects have been used to control of pests in major crops, forests, pasture, weeds and plant diseases. Lastly, Part 5 reports Latin-American experiences of integration of biological in pest management programs.
Download or read book Capybara written by José Roberto Moreira and published by Springer Science & Business Media. This book was released on 2012-08-16 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The capybara is the neotropical mammal with the highest potential for production and domestication. Amongst the favorable characteristics for domestication we can list its high prolificacy, rapid growth rate, a herbivorous diet, social behavior and relative tameness. The genus (with only two species) is found from the Panama Canal to the north of Argentina on the east of the Andes. Chile is the only country in South America where the capybara is not found. The species is eaten all over its range, especially by poor, rural and traditional communities engaged in subsistence hunting. On the other hand, in large urban settlements wildlife is consumed by city dwellers as a delicacy. The sustainable management of capybara in the wild has been adopted by some South American countries, while others have encouraged capybara rearing in captivity.
Download or read book Bromeliaceae written by David H. Benzing and published by Cambridge University Press. This book was released on 2000-04-06 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers bromeliad biology, rather than cultivation.
Book Synopsis Gene Transfer to Plants by : Ingo Potrykus
Download or read book Gene Transfer to Plants written by Ingo Potrykus and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Frequency Dictionary of Portuguese by : Mark Davies
Download or read book A Frequency Dictionary of Portuguese written by Mark Davies and published by Routledge. This book was released on 2007-11-29 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt: An invaluable tool for learners of Portuguese, this Frequency Dictionary provides a list of the 5000 most commonly used words in the language. Based on a twenty-million-word collection of Portuguese (taken from both Portuguese and Brazilian sources), which includes both written and spoken material, this dictionary provides detailed information for each of the 5000 entries, including the English equivalent, a sample sentence, and an indication of register and dialect variation. Users can access the top 5000 words either through the main frequency listing or through an alphabetical index. Throughout the frequency listing there are also thrity thematically-organized ‘boxed’ lists of the top words from a variety of key topics such as sports, weather, clothing and relations. An engaging and highly useful resource, A Frequency Dictionary of Portuguese will enable students of all levels to get the most out of their study of Portuguese vocabulary. Former CD content is now available to access at www.routledge.com/9780415419970 as support material. Designed for use by corpus and computational linguists it provides the full text in a format that researchers can process and turn into suitable lists for their own research work.
Book Synopsis Pulping the South by : Ricardo Carriere
Download or read book Pulping the South written by Ricardo Carriere and published by Zed Books. This book was released on 1996-08-15 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: The expansion of the pulp and paper industry is one of the most important causes of land and water conflicts in the South. This book examines the threat to livelihood, soil and biodiversity generated by large-scale pulpwood plantations in the South.
