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Induction of a productive aneuploid in cassava, Manihot esculenta Crantz

Nagib M.A. Nassar^I; Hala Nagib Nassar^I; Claudio G. Carvalho^I; Clibas Vieira^II

^IDepartamento de Agronomia, Universidade de Brasília, Caixa Postal 04477, 70919-000 Brasília, DF, Brasil. Send correspondence to N.M.A.N.
^IIDepartamento de Fitotecnia, Universidade Federal de Viçosa, MG, Brasil

ABSTRACT

rogenies of two interspecific hybrids of cassava (Manihot esculenta Crantz) with wild Manihot species were studied meiotically as well as mitotically. An aneuploid (2n + 2) was isolated among progeny of the interspecific hybrid of cassava with M. pseudoglaziovii, and two 2n + 2 aneuploids were isolated from progeny of the interspecific hybrid of cassava with M. neusana. One of these aneuploids derived from progeny of the interspecific hybrid cassava x M. pseudoglaziovii had a very large starchy root, while the other two aneuploids had fibrous roots. It is presumed that root formation in cassava is controlled by additive polygenes that are distributed on more than one chromosome.

Keywords: productive aneuploid; cassava; Manihot esculenta.

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