Four monosomic alien addition lines (MAALs) for Brassica alboglabra-Brassica campestris were developed through digenomic triploid (ACC) backcrossing with the recurrent parent B. alboglabra (CC). The objectives of this study were to compare morphological traits, microsatellite markers (simple sequence repeats), chromosomal karyotypes, and meiotic behaviors. Based on the new chromosome nomenclature system established for Brassica, we preliminarily identified these MAALs as CC+A1, CC+A3, CC+A6, and CC+A7. Their alien chromosomes were transmittable through both female and male gametes at rates of 11.46%-26.53% and 4.88%-12.90%, respectively.

No abstract

A selection test of four new flowering Chinese cabbage (Brassica campestris L. var. utilis Tsen et Lee)-Chinese kale (Brassica alboglabra Bailey) monosomic alien addition lines was conducted by karyotype analysis and morphological marker identification. The results mainly showed the following: 61'2n + 1' plants screened out from 655 progeny plants of the trigenomic hybrid (AAC) backcrossed with its parent flowering Chinese cabbage (AA), four new monosomic alien addition lines(AA + C 1 , AA + C 5 , AA + C 8 and AA + C 9 ) obtained from the 61 '2n + 1' plants, the transmission rates of the monosomic alien addition lines (AA + C 1 , AA + C 5 and AA + C 8 ) of 19.7%, 23.44%, and 36.51% by female gametes and 7.84%, 8.89%, and 9.43% by male gametes, respectively, and the alien chromosome C-1 and C-5 had partial homology with at least one chromosome of A-genome.