Data/hora: 02/06/2024 11:04:36

Provedor de dados: | 124
País: | Brazil
Título: | The use of different clustering methods in the evaluation of genetic diversity in upland cotton
Autores: | Araújo,Laíse Ferreira de; Almeida,Wener Santos de; Bertini,Cândida Hermínia Campos de Magalhães; Vidal Neto,Francisco das Chagas; Bleicher,Ervino.
Data: | 2014-06-01
Ano: | 2014
Palavras-chave: | Gossypium hirsutum L.; Fibre quality; Agronomic characteristics.
Resumo: | The continuous development and evaluation of new genotypes through crop breeding is essential in order to obtain new cultivars. The objective of this work was to evaluate the genetic divergences between cultivars of upland cotton (Gossypium hirsutum L.) using the agronomic and technological characteristics of the fibre, in order to select superior parent plants. The experiment was set up during 2010 at the Federal University of Ceará in Fortaleza, Ceará, Brazil. Eleven cultivars of upland cotton were used in an experimental design of randomised blocks with three replications. In order to evaluate the genetic diversity among cultivars, the generalised Mahalanobis distance matrix was calculated, with cluster analysis then being applied, employing various methods: single linkage, Ward, complete linkage, median, average linkage within a cluster and average linkage between clusters. Genetic variability exists among the evaluated genotypes. The most consistant clustering method was that employing average linkage between clusters. Among the characteristics assessed, mean boll weight presented the highest contribution to genetic diversity, followed by elongation at rupture. Employing the method of mean linkage between clusters, the cultivars with greater genetic divergence were BRS Acacia and LD Frego; those of greater similarity were BRS Itaúba and BRS Araripe.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200012
Editor: | Universidade Federal do Ceará
Relação: | 10.1590/S1806-66902014000200012
Formato: | text/html
Fonte: | Revista Ciência Agronômica  v.45 n.2 2014
Fonte: | info:eu-repo/semantics/openAccess