GENETIKA, Vol. 16, No.1 (1984)
B. WALLACE
QUANTIFYING THE CONCEALED, DETRIMENTAL GENETIC VARIATION OF MENDELIAN POPULATIONS [Abstract]
E.W. SPRAGUE
POTENTIAL ORGANIZATION FOR THE DEVELOPMENT OF MAIZE GERMPLASM. PART ONE [Abstract]
S. PANDEY, S.K. VASAL, C. De LEON, A.ORTEGA, G.GRANADOS, and E.VILLEGAS
DEVELOPMENT AND IMPROVEMENT OF MAIZE POPULATIONS [Abstract]
Nada BARJAKTAROVIĆ
STRUCTURAL CHROMOSOMAL ABERRATIONS VERSUS SISTER CHROMATII EXCHANGES IN HUMAN LYMPHOCYTES AFTER IRRADIATION IN VITRO [Abstract]
Iskra PETKOVIĆ
VARIABILITY OF EUCHROMATIC AND HETEROCHROMATIC SEGMENTS OF THE Y CHROMOSOME IN MAN [Abstract]
Dragica KRALJ
INVESTIGATION OF THE SOURCE OF VARIABILITY OF PROPERTIES OF THE HOP (HUMULUS LUPULUS L.) [Abstract]
Marija KOSANOVIĆ, Vukosava DIKLIĆ, Jovanka NIKOLIŠ, Ljiljana LJUBA and Ljiljana RUMENIĆ -GARZIČIĆ
SATELLITE ASSOCIATIONS IN NORMAL FEMALES [Abstract]
Nadežda SAVKOVIĆ, Jugoslava PEČEVSKI, Ljiljana VUKSANOVIĆ, Dušanka RADIVOJEVIĆ and P. CVETKOVIĆ
THE EFFECT OF CERULOPLASMN ON THE SURVIVAL FERTILITY AND THE INDUCTION OF MEIOTIC CHROMOSOME REARRANGEMENTS IN IRRADIATED MALE MICE [Abstract]
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 1-12
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.17.2
Original scientific paper
QUANTIFYING THE CONCEALED, DETRIMENTAL GENETIC VARIATION OF MENDELIAN POPULATIONS
B. WALLACE
Department of Biology, V.P.I. and S.U., Blacksburg, VA 24061, USA
Abstract
Wallace B. (1984): Quantifying the concealed, detrimental genetic variation of Mendelian populations. - Genetika, Vol. 16, No. 1, 1-12.
Two methods are commonly used to express the depression in viability that accompanies inbreeding and its consequent increases in homozygosity: (1) the "pigeon-hole" approach which leads, in studies on Drosophila, to the apportionment of chromosomes among lethal, semi-lethal, subvital, normal, and supervital categories, and (2) the lethal-equivalent calculation which leads to an evaluation of the depression in viability in terms of the numbers of lethal mutations per chromosomes which, if distributed randomly, would cause an equivalent depression in viability. Here, we have sought an explanation for an empirical observation: the average number of lethal equivalents per subvital chromosome is nearly the same in tests involving different species of Drosophila or different chromosomes of one species. The explanation lies in the relationships that commonly hold for xho (the mean viability of homozygotes), xhe (the mean viability of heterozygotes), ho (the standard deviation of homozygous viabilities), and he (the standard deviation of heterozygous viabilities). In large populations, these relationships cause the frequency of subvitals to approach 1.00 while the difference (d) between xho and xhe leads to estimates of lethal equivalents that hover about 0.25. In small populations, compensatory changes occurring in d (which tends to be small), and in ho and he (which tend to be about equal and more nearly equal to d) cause the frequencies of subvitals and lethal equivalents to change so that the average number of lethal equivalents per subvital chromosome remains nearly unchanged - that is, about 0.25.
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 13-22
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.1:631.523
Original scientific paper
POTENTIAL ORGANIZATION FOR THE DEVELOPMENT OF MAIZE GERMPLASM. PART ONE
E.W. SPRAGUE
International Maize and Wheat Improvement Center (CIMMYT) Londres 40, 06600 Mexico, D.F., Mexico
Abstract
Sprague E.W. (1984): Potential organization for the development of maize germplasm. Part one. - Genetika. Vol. 16, No. l, 13-22.
The paper describes methods for germplasm organization which: (1) minimise any potential for genetic vulnerability, (2) allow adequate screening and evaluation, and (3) harness and make available desirable characters to a dynamic maize improvement system.
It suggests that an appropriate regional organization of such a system would best serve the breeders in a region with similar needs and constraints.
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 23-42
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.174:631.524
Original scientific paper
DEVELOPMENT AND IMPROVEMENT OF MAIZE POPULATIONS
S. PANDEY, S.K. VASAL, C. De LEON, A.ORTEGA, G.GRANADOS, and E.VILLEGAS
Maize Program, CIMMYT, Londres 40, Col. Juarez, Deleg. Cuauhtemoc, 06600 Mexico, D.F., Mexico
Abstract
Pandey S., Vasal S.K., De Leon C., Ortega A., Granados G. and Villegas E. (1984): Development and improvement of maize populations. - Genetika, Vol. 16, No. 1, 23-42.
This paper is primarly intented for maize scientists in national programs with limited resources at their disposal for research, and for their farmers who have limited resources to do farming. It, is argued that for most developing countries, superior open—pollinated varieties are still the preferred choice to hybrids. The role of population improvement in the development of superior varieties and hybrids is discussed. The development of maize populations including collection, evaluation, and recombination of materials is presented. A system suitable for general improvement of populations involving selection for several traits simultaneously is outlined. The method permits integration of various disciplines that may be involved" in improvement of populations, and serves to consolidate the short and long term objectives of a program. Incorporation of new germplasm into a population can improve its mean performance in the short run and potential for its further improvement in the long run. Steps involved in the incorporation of additional germplasm into the population are discussed. Theoretical aspects of the method are given and data are presented to support the effectiveness of the system. A method for identification of superior families from the population and a procedure for development of varieties are outlined. Finally, since malnutrition continues to be a major problem in most of the developing countries, some experiences with developing quality protein maize are shared.
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 43-51
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
Original scientific paper
STRUCTURAL CHROMOSOMAL ABERRATIONS VERSUS SISTER CHROMATII EXCHANGES IN HUMAN LYMPHOCYTES AFTER IRRADIATION IN VITRO
Nada BARJAKTAROVIĆ
Belgrade Clinical Hospital, 1000 Belgrade, Yugoslavia
Abstract
Barjaktarovic N. (1984): Structural chromosomal aberrations versus sister chromatid exchanges in human lymphocytes after irradiation in vitro. - Genetika, Vol. 16, No. 1, 43-51.
Ionizing radiation readily produces structural changes in chromosomes, whereas it appears to be very inefficient in producing sister-chromatid exchanges.
One possible test of the suggestion that structural aberrations and SCE are different phenomena, would be to look for parallelism in response between them, when either one or the other is changed by various factors.
Using human lymphocytes we looked for such parallelism when the yield of structural aberrations was changed by radiation dose, by radiation quality, by a change of intrinsic radiosensitivity upon stimulation, or by a change in chromosome constitution.
No parallelism was found.
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 53-56
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.2:576.315.43
Original scientific paper
VARIABILITY OF EUCHROMATIC AND HETEROCHROMATIC SEGMENTS OF THE Y CHROMOSOME IN MAN
Iskra PETKOVIĆ
Zavod za zaštitu majki i djece, 41000 Zagreb, Jugoslavija
Abstract
Petković I. (1984): Variability of'euchromatic and heterochromatic segments of the Y chromosome in man. - Genetika, Vol. 16, No. 1, 53-56.
The results of an examination of heteromorphism of the Y chromosomes in 55 phenotypically normal men are presented in this paper. The results suggest variability in the length of the euchromatic and heterochromatic segments of the Y chromosome in the human population.
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 57-65
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.2
Original scientific paper
INVESTIGATION OF THE SOURCE OF VARIABILITY OF PROPERTIES OF THE HOP (HUMULUS LUPULUS L.)
Dragica KRALJ
Institute for the Hop and Brewery Research, 63310 2alec, Jugoslavia
Abstract
Kralj D. (1984): Investigation of the source of variability of properties of the hop (HumuhislupuhisL.). - Genetika, Vol. 16, No. 1, 57-65.
Nine female and seven male parents have been evaluated according to their general and specific combining ability for the ten most essential properties by means of SLQ model, adapted for the evaluation of material with missing data. The value of the investigated genotypes is marked by useful and useless variability.
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 67-73
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.224.232:576.316.25
Original scientific paper
SATELLITE ASSOCIATIONS IN NORMAL FEMALES
Marija KOSANOVIĆ, Vukosava DIKLIĆ, Jovanka NIKOLIŠ, Ljiljana LJUBA and Ljiljana RUMENIĆ -GARZIČIĆ
Institute of Biology and Human Genetics, School of Medicine, 11000 Beograd, Yugoslavia
Abstract
Kosanović Marija, Diklić Vukosava, Nikoliš Jovanka, Ljuba Ljiljana, Rumenić-Garzičić Ljiljana (1984): Satellite associations in normal females. - Genetika, Vol. 16, No. 1, 67-73.
The analysis of SAs in 50 normal females revealed that most of the parameters important for evaluation of acrocentric chromosome associativeness were in the range characteristic for normal populations.
Non-random participation in SAs was found for chromosomes 21 and 15, being significantly higher than the expected values for chromosome 21 and significantly lover for chromosomes 15.
Published in „GENETIKA“ Vol. 16, No.1 (1984), pp. 75-79
© 1984 Serbian Genetics Society
S. Bajića 1, 11185 Belgrade-Zemun
Serbia
UDC 575.224.23:576.316
Original scientific paper
THE EFFECT OF CERULOPLASMN ON THE SURVIVAL FERTILITY AND THE INDUCTION OF MEIOTIC CHROMOSOME REARRANGEMENTS IN IRRADIATED MALE MICE
Nadežda SAVKOVIĆ, Jugoslava PEČEVSKI, Ljiljana VUKSANOVIĆ, Dušanka RADIVOJEVIĆ and P. CVETKOVIĆ
Institute of Nuclear Sciences, "Boris Kidrič", Laboratory of radiobiology, Beograd
and Children’s University Hospital, 11000 Beograd, Yugoslavia
Abstract
Savković Nadežda, Pečevski Jugoslava, Vuksanović Ljiljana, Radivojević Dušanka and Cvetković P. (1984): The effect of cruloplasmn on the survival, fertility and the induction of meiotic chromosome rearrangements in irradiated male mice. - Genetika, Vol. 3 6, No. 1, 75-79.
The aim of the present paper was to determine whether ceruloplasmin (Cp), when given alone might influence the survival, reproductive ability and induction of chromosomal translocations in diakinesis-first metaphase and whether this agent has a therapeutic effect against X-rays in mice. The obtained results showed that ceruloplasmin administered alone had no effect on mortality, fertility and induction of chromosomal translocations. When ceruloplasmin was administered after irradiation the percentage of surviving and fertile males was lower than after irradiation only. The percentage of chromosomal translocations was lower in animals treated with ceruloplasmin after irradiation (3.72%) than in those irradiated only (5.22%).