Fayt V.I., Stelmakh A.F., Fedorova V.R.

Beginning and duration of expression of photoperiodic responce genes in winter bread wheat

TSitologiia i genetika 2006, v 40, Issue 2, 12-19

The influence of various Ppd genes on the beginning and duration of photoperiodic responce has been investigated in near isogenic lines of winter bread wheat Mironovskaya 808. During ontogenesis the photoperiodic responce is ascertained from the middle 2^nd stage of ontogenesis according to Kuperman (usually a week later after vernalization completion in winter genotypes) and it is completed to the late 5^th stage (2–3 weeks before heading). Different Ppd alleles do not affect the photoreaction intensity however they have an influence on its duration through the rate of development. Ppd-A1a and Ppd-B1a genes manifest shorter duration of expression when compared to the recessive alleles in the initial Mironovskaya 808 cultivar. Effect of the Ppd-B1a gene is stronger and of the Ppd-A1a is weaker.

Fayt V.I., Stelmakh A.F., Fedorova V.R. Beginning and duration of expression of photoperiodic responce genes in winter bread wheat // Tsitol Genet. – 2006. – 40(2). – P. 12-19.