Abstract Background Artificial synthesis of octoploid rapeseed double haploid (DH) induction lines Y3380 and Y3560 was made possible by interspecific hybridization genome doubling techniques. Production pure DH provides a new way to achieve homozygosity earlier in B.napus . Previously, the mechanism induction, whether has obvious maternal genotypic differences or not, are not known so far. Resu...

Induced polyploidy usually results in larger vegetative and reproductive plant organs. In order to study the effect of chromosome doubling on Thymus vulgaris , three levels colchicine concentration including 0.1, 0.3 0.5% (w/v) were applied for 6, 12 24 hours apical meristem 2- 4-leaf seedlings. Ploidy level was evaluated by flow cytometry microscopic counting. Chemical composition essential oi...