Oligo-painting and GISH reveal meiotic chromosome biases and increased meiotic stability in synthetic allotetraploid Cucumis ×hytivus with dysploid parental karyotypes

摘要

Synthesis strategy of allotetraploid . The allotetraploid × (HHCC, 2n = 4x = 38) was synthesize through interspecific hybridization between cucumber ( L. ‘BejingJietou’, CC, 2n = 2x = 14) and its sister species (HH, 2n = 2x = 24) followed by chromosome doubling. Mitotic metaphase chromosome patterns with 45S FISH signals were shown for each species