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Genetics of Coffea, 16: The variety Typica as a standard for genetical studies of Coffea arabica

by Antunes Filho, H; Carvalho, A.
Publisher: May-Jun 1957Subject(s): COFFEA ARABICA | VARIEDADES | GENETICA | MUTACION | TIPICA | EPISTASIS | COFFEA ARABICA | VARIETIES | GENETICS | MUTATION | EPISTASIS | COFFEA ARABICA | VARIETE | GENETIQUE | MUTATION | EPISTASIE In: Journal of Heredity (EUA) v. 48(3) p. 110-117Summary: In order to facilitate the understanding of dominance relations and the interpretation of interaction among the mutants found in C. arabica, it is proposed that typica be considered the only standard or "wild type" for genetic studies in this species. Because varieties of Coffea arabica usually differ from typica by one or two main genetic factors, it is possible to group them into two classes according to their genetic constitution as related to the standard. According to Hollander's definition of epistasis the known interactions among genes that control related characteristics in C. arabica is discussed. The use of typica as a standard for genetic work in Coffea arabica allows a better understanding of dominance relations and a clearer interpretation of factor interaction among the mutants of this species
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++ 2 tab. 22 ref. Sum. (En)

In order to facilitate the understanding of dominance relations and the interpretation of interaction among the mutants found in C. arabica, it is proposed that typica be considered the only standard or "wild type" for genetic studies in this species. Because varieties of Coffea arabica usually differ from typica by one or two main genetic factors, it is possible to group them into two classes according to their genetic constitution as related to the standard. According to Hollander's definition of epistasis the known interactions among genes that control related characteristics in C. arabica is discussed. The use of typica as a standard for genetic work in Coffea arabica allows a better understanding of dominance relations and a clearer interpretation of factor interaction among the mutants of this species

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