The synthesis of a new cassava-derived species, Manihot vieiri Nassar

The synthesis of a new cassava-derived species, Manihot vieiri Nassar*

N.M.A. Nassar
Departamento de Genética e Morfologia, Universidade de Brasília, Brasília, DF, Brasil
Corresponding author: N.M.A. Nassar
E-mail: nagnassa@rudah.com.br
*In honor of deceased Professor Vieira who dedicated a part of his life to cassava breeding

Genet. Mol. Res. 5 (3): 536-541 (2006)
Received April 5, 2006
Accepted June 24, 2006
Published August 11, 2006

ABSTRACT. A new species was synthesized artificially by chromosome doubling in a hybrid. The ensuing polyploid type exhibits an apomictic nature and maintains its morphological characteristics in the progeny. It showed a frequency of multiembryonic sacs of 29% in the ovules examined, whereas sacs were absent in the diploid type.

Key words: Apomixis, Interspecific crosses, Polyploidy

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