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Updated: Jun 13, 2026

Embryo Rescue Protocol for Interspecific Hybridization in Squash
Published on: September 12, 2022
Genetic, embryonic and anatomical study of an interspecific cassava hybrid
N M A Nassar1, D Y Hashimoto, D G Ribeiro
1Departamento de Genética e Morfologia, Universidade de Brasília, Campus Darcy Ribeiro, Brasília, DF, Brasil. nagnassa@rudah.com.br
Abstract:
A molecular, anatomical and cytogenetic study of an interspecific hybrid between Manihot esculenta (cassava) and the wild species M. oligantha was carried out. Cytogenetics revealed relatively complete chromosome pairing and high viability of the pollen grains. Ovule structure examined by the clearing method showed polyembryony in 2.7% of the ovules. Doubling of the chromosome number resulted in an increase in polyembryony of up to 18% and a reduction in pollen viability. Multivalent formation was also observed. An anatomical study of stems of diploid and tetraploid hybrids showed a larger number of vascular bundles in the tetraploid type.
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