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http://acervodigital.unesp.br/handle/11449/67540
- Title:
- Genetic control of fruit-setting percentage of tomatoes tolerant to high temperatures
- Universidade Estadual Paulista (UNESP)
- 0567-7572
- The aim of present work was to study, through means and variances of generations, the genetic control of fruit-set percentage in tomatoes, in a biparental cross between line Jab-95 (resistant to fruit-set) and 'Caribe' cultivar (susceptible to fruit-set) after being subjected to high temperatures. F1, F2, and backcross generations for both parents (P 1, P2) were produced in a greenhouse at FCAVUNESP, Jaboticabal-SP, Brazil. A randomized complete block experimental design with four replications was used to evaluate the different generations. Estimates of genetic parameters were obtained according to Mather and Jinks (1982). An additive-dominant model was fitted to explain the variation observed. The mean degree of dominance (0.54), indicated incomplete dominance in the direction of increasing fruit-set percentage at high temperatures. The genetic control of fruit-set percentage, at high temperatures, for tomato was found to be oligogenic or polygenic (3.54 genes). The heritability in a limited sense was 83.91%, suggesting that the selection of individuals based on the characteristic evaluated can be efficient.
- 1-Dec-2003
- Acta Horticulturae, v. 607, p. 179-184.
- 179-184
- Heritability
- Lycopersicon esculentum
- Mean degree of dominance
- Number of genes
- Plant breeding
- http://www.actahort.org/books/607/607_27.htm
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/67540
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