A Database for Triticeae and Avena
II.16. Radiosensitivity and use of its generalizing indicators in
barley hybrids and cultivars.
V. T. Manzyuk and M. R. Kozachenko. Ukrainian Institute of Plant Industry,
Plant Breeding and Genetics, Kharkov, UGS.S.R.
The air-dry seeds obtained in the year of crossing from three simple
hybrids and six of theie parents of filmy two-rowed spring barley were
treated with 10 kr of Co60 gamma-rays.
The results of this experiment showed different reaction of barley cultivars
and F1 hybrids to radiation; besides, after-effect for presowing irradiation
was different at the different stages of their development (Manzyuk and
Kozachenko 1968; Kazachenko and Manzyuk 1971). Each criterion of radiosensitivity
separately (germinating capacity, seed-setting, height, survival, bushiness
of plant et al.) defines the specific character of reaction of different
organisms to mutagen effect. Generalizing criteria (the number of survived
plant per plot, the number of productive stalks per plot, the number of
kernels obtained per one sown seed) give us the possibility of the most
complete characterization of barley radiosensitivity. The last generalizing
criterion which summarizes the mutagen after-effect for all separate indicators
at all growth stages of M1 plants can serve as an indicator of general
F1 hybrids were on the same level with their parents in a majority of
separate radiosensitivity indicators. Obviously hybrids possessed certain
parental cultivars, characters which determined their radiosensitivity
levels. This, in the first place, implies the importance of hybridization
in determining the radiosensitivity of heterozygous hybrids and constant
cultivars developed from them. Heterosis and some other factors play an
important role in this, too.
Kozachenko, M. R. and Manzyuk, V. T. 1971. Radiosensitivity of barley
cultivars and hybrids. "Genetika i selekzija na Ukraine". Materialy II
sjezda genetikov i selekzionerov Ukrainy. Kiev, U.S.S R.
Manzyuk, V. T. and Kozachenko, M. R. 1968. Sensitivity of different
varieties and F hybrids of spring barley to gamma-rays. Tsytologijai i
Genetika, 2. Kiev, U.S.S.R.
BGN 2 toc
BGN Main Index