Genetic analysis of an interspecific hybrid swarm of Populus: occurrence of unidirectional introgression.
Genetics
; 123(3): 557-65, 1989 Nov.
Article
in En
| MEDLINE
| ID: mdl-2574697
ABSTRACT
Restriction fragment length polymorphisms were used to distinguish genotypes of two species of Populus, P. fremontii ('Fremont') and P. angustifolia ('narrowleaf'). Both inter- and intraspecific polymorphisms were detected in these cottonwood trees. The interspecific variation was much greater than the intraspecific variation. This permitted identification of parental genotypes within individual trees of a hybrid swarm which exists in an overlap zone between the two species. Within this hybrid swarm, individual trees are either F1 hybrids or backcrosses with a pure 'narrowleaf' parent; no progeny were found that could be attributed to crossing between F1 hybrid trees, or to backcrossing between F1 hybrid trees and 'Fremont'.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Trees
/
Genetics, Population
Language:
En
Journal:
Genetics
Year:
1989
Document type:
Article