Análise de adaptabilidade e estabilidade e correlação entre variáveis morfológicas e produtivas em cultivares crioulas de milho

Detalhes bibliográficos
Ano de defesa: 2018
Autor(a) principal: Somavilla, Iana
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
Brasil
Agronomia
UFSM
Programa de Pós-Graduação em Agronomia
Centro de Ciências Rurais
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/15719
Resumo: Maize landraces have great genetic variability and are considered important sources of alleles for use in Genetic Improvement Programs and also in family farming systems. The objectives of this thesis were to evaluate and compare the parameters of adaptability and stability for the morphological and productive variables in maize landraces and to estimate the correlation between morphological and productive characters. The experiments were conducted in the municipality of Ibarama, RS, in three sowing seasons in the 2015/2016 and 2016/2017 harvests, and morphological and productive characters of 11 cultivars and improved maize were evaluated. For plant height and spike insertion height, the 'Amarelão' cultivar, in addition to the lower averages, presents broad adaptability and stability, and 'Brancão' presents specific adaptability to favorable environments and, 'Cunha', low stability for both characters . Among the productive characteristics, the productivity and the weight of a thousand grains are those that determine the greater specificities of the genotypes in favorable and unfavorable environments, as well as the lower stabilities. Morphological and productive characters do not correlate with each other. Maize plants of higher stature are associated with those that produce spikes with higher number of rows, number of grains per row and weight of a thousand grains, but with lower productivity,