title: Genome discrimination in progeny of interspecific hybrids between Brassica napus and Raphanus raphanistrum.
abstract: Genomic in situ hybridization (GISH) applied to the F1 interspecific hybrid between oilseed rape (Brassica napus, AACC, 2n = 38) and wild radish (Raphanus raphanistrum, RrRr, 2n = 18) showed the predicted 19 chromosomes from B. napus and 9 chromosomes from R. raphanistrum. The very low female fertility of these interspecific hybrids when backcrossed to R. raphanistrum led to only two descendants. Their chromosome number varied between 45 and 48. Both of these progenies showed only 9 chromosomes from R. raphanistrum and 36-39 chromosomes from B. napus. These results indicate the efficiency and limits of GISH as a suitable tool to assess and interpret the behavior of chromosomes after such interspecific crosses. The unexpected chromosome combination is discussed.
authors.affiliation: Unité de Malherbologie et Agronomie, INRA BP 86510, 21065 Dijon CEDEX, France.
authors.forename: A
authors.initials: A
authors.lastname: Benabdelmouna
authors.forename: G
authors.initials: G
authors.lastname: Guéritaine
authors.forename: M
authors.initials: M
authors.lastname: Abirached-Darmency
authors.forename: H
authors.initials: H
authors.lastname: Darmency
mesh_terms: D029688:Brassica napus / Q000235:genetics*; D032461:Chromosomes, Plant / Q000235:genetics*; D006824:Hybridization, Genetic; D017403:In Situ Hybridization; D031224:Raphanus / Q000235:genetics*