title: In vitro hybridization in an incompatible cross Nicotiana glutinosa X Nicotiana megalosiphon.
abstract: Using conventional techniques interspecific hybridization between N. glutinosa (2n=24) and N. megalosiphon (2n=40) results in failure while the reciprocal is successful. Attempts were made here to obtain an F1 hybrid of N. glutinosa X N. megalosiphon by embryo rescue. These reciprocal hybrids resembled each other in their phenotypic and chromosomal behaviour, i.e. there is broad spectrum of phenotypic variation coupled to chromosomal range from 2n-28 to 32. This may be due to the functional disharmony between chromosome sets of two unrelated species resulting in the elimination of chromosomes.
authors.affiliation: Central Tobacco Research Institute, Rajahmundry, A.P., India.
authors.forename: U
authors.initials: U
authors.lastname: Subhashini
authors.forename: T
authors.initials: T
authors.lastname: Venkateswarlu
authors.forename: K
authors.initials: K
authors.lastname: Anjani
authors.forename: G S
authors.initials: GS
authors.lastname: Prasad