Data/hora: 01/06/2024 15:49:12

Provedor de dados: | 65
País: | Brazil
Título: | Genetic parameters, phenotypic, genotypic and environmental correlations and genetic variability on sunflower in the Brazilian Savannah
Autores: | Lira,Ellen Grippi; Amabile,Renato Fernando; Fagioli,Marcelo; Montalvão,Ana Paula Leite.
Data: | 2017-01-01
Ano: | 2017
Palavras-chave: | Genetic diversity; Genetic resources; Genotypic correlations; Helianthus annuus L.
Resumo: | ABSTRACT: Sunflower (Helianthus annuus L.) is an annual crop that stands out for its production of high quality oil and for an efficient selection, being necessary to estimate the components of genetic and phenotypic variance. This study aimed to estimate genetic parameters, phenotypic, genotypic and environmental correlations and genetic variability on sunflower in the Brazilian Savannah, evaluating the characters grain yield (YIELD), days to start flowering (DFL) based on flowering date in R5, chapter length (CL), weight of a thousand achenes (WTA), plant height (H) and oil content (OilC) of 16 sunflower genotypes. The experiment was conducted at Embrapa Cerrados, Planaltina, DF, situated at 15º 35’ 30”S latitude, 47º 42’ 30”W longitude and 1.007m above sea level, in soil classified as dystroferric Oxisol. The experimental design used was a complete randomized block with four replicates. The nature for the effects of genotypes and blocks was fixed. Except for the character chapter length, genetic variance was the main component of the phenotypic variance among the genotypes, indicating high genetic variability and experimental efficiency with proper environmental control. In absolute terms, the genetic correlations were superior to phenotypic and environmental. The high values reported for heritability and selective accuracy indicated efficiency of phenotypic selection. Results showed high genetic variability among genotypes, which may contribute to the genetic improvement of sunflower.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000800402
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20160719
Formato: | text/html
Fonte: | Ciência Rural  v.47 n.8 2017
Fonte: | info:eu-repo/semantics/openAccess