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Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Embora haja grande variabilidade gen?tica para a couve, s?o poucos trabalhos no Brasil que vis?o obter informa??es para programas de melhoramento gen?tico nesta cultura. Assim, objetivou-se neste trabalho caracterizar 30 gen?tipos de couve a partir de caracteres morfo-agron?micos para estimar a diverg?ncia gen?tica, a import?ncia dos caracteres para a diverg?ncia, o desempenho agron?mico, os par?metros gen?ticos e a correla??o entre as caracter?sticas avaliadas. O experimento foi conduzido na Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) utilizando o delineamento em blocos casualizados com quatro repeti??es constitu?dos por cinco indiv?duos, avaliando-se 30 gen?tipos de couve a partir de 44 caracter?sticas. Observaram-se gen?tipos com grande diverg?ncia gen?tica entre si, sendo os gen?tipos UFLA-6 e UFVJM-24 os mais divergentes dos demais, contudo, a maioria dos gen?tipos s?o similares, o que evidencia uma base gen?tica restrita. O comprimento do pec?olo, propor??o da proje??o alada, o tom de roxo da superf?cie adaxial da nervura prim?ria, formato da margem foliar, n?mero de folhas totais, formato da base da folha e di?metro da base do pec?olo foram as caracter?sticas mais discriminantes quanto ? diverg?ncia gen?tica em gen?tipos de couve. Verificou-se variabilidade gen?tica entre os gen?tipos, com predomin?ncia dos efeitos gen?ticos sobre os ambientais, indicando a possibilidade de se obter ganhos gen?ticos representativos no melhoramento. O comprimento da folha, largura da folha, di?metro do pec?olo, ?rea foliar, altura da planta, n?mero de brota??es e massa seca da folha se apresentaram como as caracter?sticas mais importantes no melhoramento gen?tico da couve. Os gen?tipos comerciais apresentaram caracter?sticas distintas dos demais gen?tipos. Verificou-se destaque para o gen?tipo UFLA-11, que se apresentou entre os gen?tipos com maior tamanho de folha e produ??o de folhas comerciais. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Although there is large kale genetic variability there are few studies in Brazil aiming to obtain information of this culture for breeding programs purposes. Thus, this study aimed to characterize 30 kale genotypes from morpho-agronomic traits to estimate the genetic diversity, the importance of those traits for the divergence, the agronomic performance, the genetic parameters and the correlation between the evaluated characteristics. The experiment was conducted at the Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), using a randomized block design with four replicates consisting of five individuals, evaluating 30 genotypes of kale from 44 features. Genotypes with significant genetic divergence were observed, and the genotypes UFLA-6 and UFVJM -24 were the ones most divergent from the others, however, most genotypes are similar, which shows a narrow genetic base. The petiole length, projection winged proportion, the purple shade of adaxial surface of the primary beam, form of leaf margins, number of leaves, shape of leaf base and diameter of the base of the petiole were the characteristics that stood out for genetic divergence in kale genotypes. There was observed significant genetic variability among genotypes, with a predominance of genetic effects over the environmental ones, indicating the possibility of obtaining representative genetic gains in breeding. The leaf length, leaf width, petiole?s diameter, leaf area, plant height, shoot number and dry weight of the leaves are presented as the most important features in the kale genetic improvement. The commercial genotypes showed distinct characteristics from the other genotypes. It stands for genotype UFLA-11, which appeared between genotypes with biggest leaf size and commercial leaf production.
| Identifer | oai:union.ndltd.org:IBICT/oai:acervo.ufvjm.edu.br/jspui:1/566 |
| Date | 09 March 2012 |
| Creators | Azevedo, Alcinei Mistico |
| Contributors | Andrade J?nior, Valter Carvalho de, Silva, Ernani Clarete da, Fernandes, Jos? Sebasti?o Cunha, Elsayed, Ahmed Youssef Abdelnabi Mohamed, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFVJM, instname:Universidade Federal dos Vales do Jequitinhonha e Mucuri, instacron:UFVJM |
| Rights | info:eu-repo/semantics/openAccess |
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