Alterations of reproduction system in a polyploidized cassava interspecific hybrid.
The objective of this research was to examine how much polyploidy may affect seed and root formation in cassava interspecific hybrids Manihot esculenta Crantz xM. oligantha Pax. A polyploid type was induced by colchicine treatment to lateral buds followed by propagating vegetatively arising stems. Cytogenetic and anatomical analyses were made on both polyploid and diploid types. The polyploid type showed extensive chromosome pairing and pollen viability. Multiembryonic ovule frequency increased in polyploid plants. Stalks became woody and propagation through roots difficult, the edible roots increased, however, in size.
Departamento de Genética e Morfologia, Universidade de Brasília, Campus Darcy Ribeiro, CXP 04477 CEP 70719-000, Brasília, Brasil. nagnassa@rudah.com.br
Nagib M A
NM
Nassar
Dalva
D
Graciano-Ribeiro
Paula F
PF
Gomes
Danielle Y C
DY
Hashimoto
D002365:Manihot / Q000235:genetics / Q000502:physiology*; D011123:Polyploidy; D012098:Reproduction