Genetic diversity among Brazilian okra landraces detected by morphoagronomic and molecular descriptors



Document title: Genetic diversity among Brazilian okra landraces detected by morphoagronomic and molecular descriptors
Journal: Acta scientiarum. Agronomy
Database: PERIÓDICA
System number: 000459999
ISSN: 1679-9275
Authors: 1
1
2
3
4
1
Institutions: 1Universidade Estadual de Londrina, Departamento de Agronomia, Londrina, Parana. Brasil
2Universidade Estadual de Londrina, Departamento de Biologia, Londrina, Parana. Brasil
3Universidade Estadual de Maringa, Departamento de Agronomia, Maringa, Parana. Brasil
4Universidade Federal de Vicosa, Departamento de Agronomia, Vicosa, Minas Gerais. Brasil
Year:
Volumen: 42
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, analítico
English abstract The conservation of okra landraces [Abelmoschus esculentus (L.) Moench] in gene banks is essential for the success of their use in breeding programmes. This study evaluated the genetic diversity among okra landraces in Brazil based on morphoagronomic descriptors and AFLP markers. We studied 30 accessions of the vegetable gene bank of the Universidade Federal de Viçosa. To this end, 17 morphoagronomic descriptors and five combinations of AFLP primers were used. Genetic parameters were estimated for the quantitative traits and the accessions were grouped by Ward’s method, using the Gower’s and Jaccard’s distance measures, respectively, for the morphoagronomic and molecular data. Polymorphisms were observed for all qualitative traits, while the quantitative traits were significant by deviance analysis. The genetic parameters confirmed the existence of variability among accessions, and high accuracy and heritability indices were found for the traits related to fruit and plant height. Ward’s grouping showed no relationship between the clusters formed with the morphoagronomic and molecular data and the geographical origin of the accessions. No association between morphoagronomic descriptors and AFLP markers was observed. The lack of correlation suggests that both approaches of characterization are important to understand and differentiate the okra accessions
Disciplines: Biología
Keyword: Angiospermas,
Genética,
Abelmoschus esculentus,
Variabilidad genética,
Marcadores moleculares,
Fenotipos,
Análisis bayesiano,
Abelmoschus esculentus
Keyword: Angiosperms,
Genetics,
Genetic variability,
Molecular markers,
Phenotypes,
Bayesian analysis
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