Resumo
The inheritance of two characters in Manihot utilissima Pohl were studied. It was found that the leaves with narrow lobes V (Fig. 1) are dominant over leaves with large lobes v (Fig. 2) and that the brown coloration of the roots M (Fig. 5) is dominant over white m (Fig. 6). These two characters segregate independently, according to the dates recorded in tables III and IV. The phenotypic expression of the form of the leaves is largely dependent from the environment, the leaves with narrow lobes being replaced by leaves with large lobes in plants transported to a shady place under big trees. (Figs. 3 and 4). Thus reduction of light causes a change of dominance.
Genética de manihot I. hereditariedade da forma da folha e da coloração da película externa das raizes em Manihot Utilissima pohl
E. A. Graner (* (* ) Da Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo. )
SUMMARY
The inheritance of two characters in Manihot utilissima Pohl were studied.
It was found that the leaves with narrow lobes V (Fig. 1) are dominant over leaves with large lobes v (Fig. 2) and that the brown coloration of the roots M (Fig. 5) is dominant over white m (Fig. 6). These two characters segregate independently, according to the dates recorded in tables III and IV.
The phenotypic expression of the form of the leaves is largely dependent from the environment, the leaves with narrow lobes being replaced by leaves with large lobes in plants transported to a shady place under big trees. (Figs. 3 and 4). Thus reduction of light causes a change of dominance.
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LITERATURA CITADA
- 1. Brieger, F. G. Em Tábuas e fórmulas para estatística, pag. 1-46. Cia. Melhoramentos de S. Paulo, 1938.
- 2. Graner, E. A. Notas sobre florescimento e frutificação da mandioca. Bragantia 2:1-8. Figs. 1 -6. 1942.
- 3. Graner, E. A. Polyploid cassava induced by colchicine treatment. Journal of Heredity 32: 281-288. Fig. 18-24. 1941.
- 4. Graner, E. A. Tratamento de mandioca pela colchicina. II. Formas poliplóides obtidas. Bragantia (no prelo) 1942.
- 5. Mendes, C. T. Algumas notas para a cultura da mandioca. Revista de Agricultura 5: 95-102. 1930.
- 6. Viégas, A. P. Anatomia da parte vegetativa da mandioca. Bol. Tec. Inst. Agr. do Estado de S. Paulo, 74:1-32, 65 figs. 1940.
Datas de Publicação
-
Publicação nesta coleção
01 Jul 2010 -
Data do Fascículo
Jan 1942
