Chromosome doubling induces apomixis in a cassava x Manihot anomala hybrid.
A new species was synthesized artificially by chromosome doubling of an interspecific hybrid between cassava and Manihot anomala. The ensuing polyploid type exhibits an apomictic nature and maintains its morphological characteristics in the progeny. It showed a 29% frequency of multiembryonic sacs in its examined ovules whereas the multiembryonic sacs were absent in the diploid type.
Nassar
Nagib M A
NM
Universidade de Brasilia, Brasilia, Brazil. nagnassa@rudah.com.br
D002678:Chimera; D032461:Chromosomes, Plant; D003433:Crosses, Genetic; D004171:Diploidy; D006824:Hybridization, Genetic; D002365:Manihot / Q000196:embryology / Q000235:genetics*; D011123:Polyploidy; D012100:Reproduction, Asexual; D012641:Selection, Genetic