Divergência genética entre acessos de açafrão (Curcuma longa L.) utilizando caracteres morfoagronômicos
Carregando...
Data
2005-05-20
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
Two experiments were conducted in the experimental area of the Universidade
Federal de Goiás for assessing the genetic divergence among 21 genotypes of turmeric
cultivation in two years (EI) and 33 genotypes in cultivation of one year (EII) based on
multivariate analyses, order to select divergent genotypes and find out the Mara Rosa
producers use the same genotype. The accessions came from Goiás, Minas Gerais and São
Paulo. The experiments were conducted in the 2001/2003 period (EI) and 2003/2004 (EII)
using a randomized block design with four replications. The assessment of EI was based
on production descriptors as total wet weight of rhizomes, dry weight and content of
curcumin. The assessment of EII was based on shoot descriptors as tiller number, leaf
number, leaf area, height and also production descriptors. Data were subjected to analysis
of variance and means were compared by the Scott-Knott test at 1% and 5% probability.
We used the Mahalanobis distance as the dissimilarity measure, and for groups delineation
the method of Tocher. All analyzes were performed using the program GENES. In the
analyzes it can be concluded that Mara Rosa farmers did not use the same genotype and
there is variability in the selection of genotypes. The evaluated characteristics are strongly
correlated, which justifies the use of measures of dissimilarities using the Mahalanobis
distance. Multivariate techniques were effective for the study of genetic diversity and
separated the accessions into groups. Methods of estimation of genetic diversity in
turmeric accessions were equivalent. Curcumin content and dry weight were descriptors
that contributed to divergence in EI. In EII were plants number and tillers number. It was
found the increase in curcumin levels of after two years of cultivation. By Mahalanobis
distances could be indicated the five most productive genotypes for breeding program and
divergence genetic analysis showed the genotypes more indicated for hybridizations.
Descrição
Palavras-chave
Citação
CINTRA, Maria Mônica Domingues Franco. Divergência genética entre acessos de açafrão (Curcuma longa L.) utilizando caracteres morfoagronômicos. 2005. 87 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2005.