Iushkina L L, Nesterova E V, Kirichenko V V, Dolgova T A, Popov V N
Tsitol Genet. 2009 Jan-Feb;43(1):42-7.
Meiosis of wild species (H. praecox) and cultivated sunflower (H. annuus), their F1 interspecific hybrid as well as two backcross generations has been studied. A low level of chromosomal abnormalities in the parents was detected. Interspecific hybridization between the wild and cultivated samples has led to a considerable (50%) increase of meiosis abnormalities in sunflower pollen mother cells. Backcrossing of hybrids by cultivated sunflower decreased the chromosomal abnormalities level to 12.8% in BC1 and 9.6% in BC2. Cytological stability of plants restored in BC2 only.
对野生种（早熟向日葵）和栽培向日葵及其种间杂种F1以及两个回交世代的减数分裂进行了研究。检测到亲本中染色体异常水平较低。野生样本与栽培样本之间的种间杂交导致向日葵花粉母细胞减数分裂异常显著增加（50%）。杂种与栽培向日葵回交使BC1代染色体异常水平降至12.8%，BC2代降至9.6%。仅在BC2代恢复了植株的细胞学稳定性。
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