[Cytogenetic study of an interspecific hybrid Helianthus praecox x H. annuus, its parental forms and two backcrosses].
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.
Iushkina
L L
LL
Nesterova
E V
EV
Kirichenko
V V
VV
Dolgova
T A
TA
Popov
V N
VN
D002869:Chromosome Aberrations; D003433:Crosses, Genetic; D020732:Cytogenetic Analysis; D006368:Helianthus / Q000166:cytology / Q000235:genetics*; D006824:Hybridization, Genetic; D008540:Meiosis / Q000235:genetics; D054817:Pollination / Q000235:genetics; D012641:Selection, Genetic