GENETIKA, Vol. 18, No.3 (1986)
D. MIŠEVIĆ, N. JOVANDIĆ, J. DUMANOVIĆ, L. KOJIĆ, R.K. GREDER, Julka VREBALOV and Milena MIŠEVIĆ
GENETIC RATES OF GAIN IN HYBRID MAIZE YIELDS IN YUGOSLAVIA IN PERIOD 1966-1984. I. FAO MATURITY 500-700 [Abstract]
D. MARINKOVIĆ and F.J. AYALA
SELECTION FOR DIFFERENT RATES OF EMBRYONIC DEVELOPMENT IN DROSOPHILA MELANOGASTER AND DROSOPHILA SIMULANS [Abstract]
A. MOYA and A. LATORRE
HYPERBOLIC RELATIONSHIP BETWEEN PER-FEMALE PRODUCTIVITY AND DENSITY IN TWO STRAINS OF DROSOPHILA PSEUDOOBSCURA [Abstract]
Olga ĐORĐEVIĆ and Ljiljana KOSTIĆ
EFFECT OF A CHEMOTHERAPEUTIC AGENT AND HYPERTHERMIA ON THE FREQUENCY OF MICRONUCLEI IN L CELLS [Abstract]
Iskra PETKOVIĆ
C-BAND HETEROMORPHISM OF THE Y CHROMOSOME IN 26 FATHERS OF CHILDREN WITH CHROMOSOME ABERRATION [Abstract]
Marjana TOMIĆ
SISTER CHROMATID EXCHANGES IN LONG-LIVED HUMANS [Abstract]
M.D. OCHANDO
MATING SPEED, DURATION OF COPULATION AND MATING COMPETITION IN EYE PIGMENTS MUTANTS OF DROSOPHILA MELANOGASTER [Abstract]
Published in „GENETIKA“ Vol. 18, No.3 (1986), pp. 181-204
© 1986 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.222.7 : 631.524.84
Original scientific paper
GENETIC RATES OF GAIN IN HYBRID MAIZE YIELDS IN YUGOSLAVIA IN PERIOD 1966-1984. I. FAO MATURITY 500-700
D. MIŠEVIĆ1, N. JOVANDIĆ2, J. DUMANOVIĆ1, L. KOJIĆ1, R.K. GREDER3, Julka VREBALOV2 and Milena MIŠEVIĆ
1Maize Research Institute "Zemun Polje", 11081 Beograd-Zemun, Yugoslavia
2Commission for the Varietal Approbation of Cultivated Plants 11000 Beograd, Yugoslavia
3International Research and Exchanges Board, Princeton N.J. 1. U.S.A. visiting scientist, Maize Research Institute "Zemun Polje" 11081 Beograd-Zemun, Yugoslavia
4Institute for Commercial Study and Organization, 11000 Beograd, Yugoslavia
Abstract
Mišević D., Jovandić N., Dumanović J., Kojić L., Greder R.R. and Vrebalov J. (1986): Genetic rates of gain in hybrid maize yield in Yugoslavia for period 1966-1982. I.FAO maturity groups 500-700. - Genetika, Vol. 18, No. 3,181-204.
Genetic gains were estimated using long-term data available from trials conducted by the Commission for Approbation of Cultivated Plants. Changes were followed in the period of 17 years. FAO 500, 600 and 700 maturity groups were selected. Within each maturity group four criteria were used: best yielding hybrid in experiment, mean of all released hybrids, mean of released single crosses and mean of whole experiment.
The objective of this paper was to study changes in grain yield, days to silk, percent water in kernel at harvest and percent lodged plants for the hybrids tested in the period from 1966 to 1984.
Published in „GENETIKA“ Vol. 18, No.3 (1986), pp. 205-219
© 1986 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.174.4
Original scientific paper
SELECTION FOR DIFFERENT RATES OF EMBRYONIC DEVELOPMENT IN DROSOPHILA MELANOGASTER AND DROSOPHILA SIMULANS
D. MARINKOVIĆ and F.J. AYALA
Faculty of Science and Institute for Biological Research
University of Beograd, 11000 Beograd, Yugoslavia and Department of Genetics, University of California at Davis, Davis, California, U.S.A.
Abstract
Marinković D. and Ayala F.J. (1986): Selection for different rates of embryonic development in Drosophila melanogaster and Drosophila simulans. - Genetika, Vol. 18, No. 3, 205-219.
We have practiced artificial selection for fast, intermediate, and slow rate of embryonic development in lines derived from two natural populations of Drosophila melanogaster and one of D. simulans. We have not achieved any conspicuous divergence between lines in mean embryogenesis time; in part, because of the strong effect of subtle environmental variations. Nevertheless, the selection has produced genetic changes affecting the rate of embryogenesis; the genetic variance between the selected lines increases in the latter generations of selection. The two species, as well as the two geographically separate populations of D. melanogaster, differ in their genetic make-up with respect to embryogenesis time. We conjecture that there is considerable genetic variation for rate of embryogenesis. But the polymorphisms are strongly balanced by natural selection because of the trade-offs between the fitness gained by fast development and physiological constraints that may affect the late components of fitness.
Published in „GENETIKA“ Vol. 18, No.3 (1986), pp. 221-226
© 1986 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.172
Original scientific paper
HYPERBOLIC RELATIONSHIP BETWEEN PER-FEMALE PRODUCTIVITY AND DENSITY IN TWO STRAINS OF DROSOPHILA PSEUDOOBSCURA
A. MOYA and A. LATORRE
Department of Genetics, Faculty of Biological Sciences 50, Burjassot, Valencia, Spain
Abstract
Moya a. and Latorre A. (1986): Hyperbolic relationship between per-female productivity and density in two strains of Drosophila pseudoobscura. - Genetika, Vol. 1 8, No. 3, 221-226.
Five kinds fo fits have been checked to study the dependence between per-female productivity, a form of measuring survival, and the number of females in cultures of Drosophila pseudoobscura with increasing number of couples. The statistical analysis has shown that a hyperbolic function is the most accurate description of the experimental results. It seems that the function represents a combination of several fitness components, i.e.: propensity to lay eggs, probability of oviposition, egg-fecundity, the intrinsic viability of eggs and larvae, and larva-to-adult viability in a competition context. The product of the fitness functions is a polynomic function that can have the same or similar shape, to that obtained with the hyperbolic fit.
Published in „GENETIKA“ Vol. 18, No.3 (1986), pp. 227-234
© 1986 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.21:576.315.45
Original scientific paper
EFFECT OF A CHEMOTHERAPEUTIC AGENT AND HYPERTHERMIA ON THE FREQUENCY OF MICRONUCLEI IN L CELLS
Olga ĐORĐEVIĆ and Ljiljana KOSTIĆ
Department of Radiobiology, Institute of Nuclear Sciences "Boris Kidrič", Vinča, P.O. Box 522,11001 Beograd, Yugoslavia
Abstract
Dordevic" O. and Kostic Lj. (1986): Effect of a chemotherapeutic agent and hyperthermia on the frequency of micronuclei in L cells. - Genetika, Vol. 18, No. 3, 227-234.
Cell survival and micronuclei induction have been studied in L cells after treatment with the chemotherapeutic agent Teniposide (VM 26) The potentiation of the killing effect and the frequency of micronuclei induced by VM 26 treatment by hyperthermia (1 hour at 42° C) and caffeine (2 mM) treatment at different expression times (24, 48 and 72 hours) were also examined. The survival data show that during t hour incubation at 37°C VM26 reduced the survival depending on drug concentration. The killing effect was potentiated when VM 26 treatment was performed under hyper-thermic conditions (1 hour at 42° C). Postincubation of VM 26 treated cells in the presence of 2 mM caffeine was characterised by complete elimination of the shoulder and a steeper slope of the survival curves. In VM 26 ireated cells (1 hour at 37° C) a dose dependent increase in the frequency of micronuclei was found at all sampling times (24, 48 and 72 hours). Hyperthermia in VM 26 treated cells (1 hour at 42°C delayed the cell cycle and greatly increased the number of cells with micronuclei. The effect of low VM 26 concentration (0.1 μg/ml) on micronuclei induction was highly potentiated by postincubating the cells with 2 mM caffeine. In these cells a very high population of cells containing several nuclei (4-5) was also observed.
Published in „GENETIKA“ Vol. 18, No.3 (1986), pp. 235-238
© 1986 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.224.232
Original scientific paper
C-BAND HETEROMORPHISM OF THE Y CHROMOSOME IN 26 FATHERS OF CHILDREN WITH CHROMOSOME ABERRATION
Iskra PETKOVIĆ
Institute for mother and child health, Zagreb, Yugoslavia
Abstract
Petković Iskra (1986): C-band heteromorphism of the Y chromosome in 26 fathers of children with chromosome aberration, Genetika, Vol. 18, No. 3, 235-238.
On the basis of Yc:F index (length of the C-~Band of Y chromosome: length of F group chromosomes), no differences in size between the group of fathers of children with chromosome aberrations and healthy controls was established.
Published in „GENETIKA“ Vol. 18, No.3 (1986), pp. 239-246
© 1986 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.224.232.3
Original scientific paper
SISTER CHROMATID EXCHANGES IN LONG-LIVED HUMANS
Marjana TOMIĆ
Belgrade Clinical Hospital, 11000 Beograd, Yugoslavia
Abstract
Tomić M. (1986): Sister chromatid exchanges in long-lived humans. - Genetika, Vol. 18, No. 3, 239-246.
The age of the individual is an important biological factor, having a marked influence on the frequency of spontaneous SCE in various' systems, but reports of such studies on very old people are still very rare. We thought it to be of interest to make some investigations in a group of healthy persons up to the age of 100.
The BUdR-differential staining technique was used in a study of the frequency of sister chromatid exchanges (SCE-s)'in the peripheral blood lymphocytes of donors between 70 and 100 years, and correlated to sex and diagnosis.
The results showed that the baseline frequency of SCE-s in this group is at a very low level indeed (3.26 ± 1.60).
No sex difference was found in SCE rates, but we found some significant differences between donors with different diagnoses. A normal number of SCE-s was found in the group of donors with Myocardiopathia. The lowest mean number of SCE-s was found in the group of donors with "pure" Arteriosclerosis, and the highest number of SCE-s in the group of donors with Arteriosclerosis combined with some other banal disease.
Published in „GENETIKA“ Vol. 18, No.3 (1986), pp. 247-256
© 1986 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.222.2
Original scientific paper
MATING SPEED, DURATION OF COPULATION AND MATING COMPETITION IN EYE PIGMENTS MUTANTS OF DROSOPHILA MELANOGASTER
M.D. OCHANDO
Departmento de Genetica, Facultad de Biologia, Universidad Complutense de Madrid, 28040 Madrid, Spain
Abstract
Ochando M. D. (1986): Mating speed, duration of copulation and mating competition in eye pigments mutants of Drosophih melanogaster. - Genetika, Vol. 18, No. 3,247-256.
Mating speed, duration of copulation total frequency of matings and mating competition among different eye-colour mutants were studied in a population of Drosophila melanogaster. Clear differences in mating speed and in competitive ability were found among different males: males possessing the more pigmented eye-colour are more successful in mating. The duration of copulation is determined by the male; no differences among females exist in any one case. The data confirm the importance that different parameters of sexual behaviour may have in determining fitness.