Estudos sobre a segregacao do carácter cor de amendoas de cacau
To determine the mechanism which governs the heredity for the color factor of cacao seeds, three hybrid cacao trees were self pollinated using hand pollination techniques. These three cacao hybrids were themselves the result of open pollination between a single white seeded cacao plant cv. Catongo, in the midst of a population of violet seeded Amazon cacao. The seeds obtained from these self-pollinations were peeled (testa removed) and classified into three groups according to their color ie. white, dark violet with a red tinge and dark violet. The difficulty encountered in separating the different pigmentations indicate the almost complete dominance of the genes responsible for anthocyanin formation for those hybrids under study. The presence of only one pair of genes controlling the color character of cacao seeds supports the hypothesis that there is a relatively high frequency of recessive genes in the populations of violet seeded cacao in Bahia, masked by the almost complete dominance of their alleles. This could thus explain the relatively frequent occurrence of white seeded cacao trees in different zones of the Bahian cacao region
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| Format: | biblioteca |
| Published: |
1972
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| Subjects: | THEOBROMA CACAO, HIBRIDOS, SEMILLAS, COLOR, HEREDABILIDAD, SEGREGACION, PROPIEDADES FISICO-QUIMICAS, CULTIVAR CATONGO, BAHIA, BRASIL, |
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