Interspecific hybridization in sexual diploid Allium senescens var. minor x apomictic tetraploid A-nutans and sexual diploid A-senescens var. minor xapomictic hexaploid A-senescens

Fourteen interspecific hybrids in sexual diploid Allium senescens var. mino r x apomictic tetraploid Allium nutans L. crosses, and eight interspecific hybrids in sexual diploid A. senescens var, minor x apomictic hexaploid A. senescens L. crosses were produced. The number of chromosomes was 2n = 24 i n interspecific hybrids of diploid x tetraploid, and 2n = 32 in diploid x h exaploid crosses. Triploid and tetraploid interspecific hybrids showed inte rmediate parental morphological characteristics. Tetraploid interspecific h ybrids of A. senescens var. minor x A. senescens crosses formed two groups based on leaf colour and leaf width. Seeds were formed in 11 out of 14 trip loid interspecific hybrids under natural conditions. In cytological observa tions of par thenogenesis, three out of 12 triploid interspecific hybrids a nd five out of eight interspecific tetraploid hybrids were observed. Parthe nogenesis ranged from 26.0% to 86.0% in five tetraploid interspecific hybri ds. Non-parthenogenesis to parthenogenesis segregated in a 3.5 ratio in A. senescens var. mirror x A. senescens crosses.