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- Title
Selection of desirable characters for papaya genetic improvement programs associated with hydric and thermal stress.
- Authors
Costa, Taís F.; Lopes, Beatriz G.; Faria, Glaucia A.; Ribeiro, Otavio A. P. da S.; Suares-Rocha, Paula; de Lima, Juliana F.; Felizardo, Lucas M.; Junior, Enes Furlani
- Abstract
Papaya cultivation is widespread in Brazil, particularly in the states of Bahia and Espírito Santo, where most commercial plantations are concentrated. Owing to the economic and social importance of papaya, the present study aimed to determine the explanatory variables between the genotypes of two cultivars: Golden (from the Soil group) and Tainung Nº 1 hybrid (from the Formosa group), cultivated under high temperatures and hydric stress. The genotypes containing more desirable agronomic characteristics were identified for use in plant genetic improvement programs. Principal component analysis (PCA) was applied to select the desirable genotypes for Golden and Tainung Nº 1 cultivars based on specific variables analyzed for two groups of variables; for group 1, the plant height, stem diameter, leaf length, leaf width, and leaf number were analyzed, whereas for group 2, the leaf and root dry mass, stem dry mass and fresh mass of 10 discs, fresh mass, and stem and root fresh mass were analyzed. When exposed to hydric and thermal stress, the Tainung Nº 1 cultivar outperformed the Golden cultivar for the evaluation characteristics selected for use in genetic improvement programs.
- Subjects
ESPIRITO Santo (Brazil : State); BAHIA (Brazil : State); TAIWAN; THERMAL stresses; MULTIVARIATE analysis; HIGH temperatures; PAPAYA; GENOTYPES; PRINCIPAL components analysis
- Publication
Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi, 2023, Vol 27, Issue 5, p422
- ISSN
1807-1929
- Publication type
Article
- DOI
10.1590/1807-1929/agriambi.v27n5p422-428