GENETIKA, Vol

GENETIKA, Vol. 1, No.2 (1969)

A. K. A. SELIM, A. A. M. OMAR, and L. R. M. MOHAMED

ASSOCIATION STUDIES BETWEEN SOME CHARACTERS IN BARLEY [Abstract]

P. MIŠIĆ and Ž. TEŠOVIĆ

A CONTRIBUTION TO THE STUDY OF INDUCED SOMATIC MUTATIONS IN THE JONATHAN APPLE [Abstract]

S.E.A. YOUNIS

LOCATING GENES DETERMINING RESISTANCE TO FUSARIUM STALK-ROT IN MAIZE [Abstract]

A. TAVČAR and Vlasta KENDJELIĆ

CYTOGENETIC CHARACTERISTICS OF INDUCED “VIVIPAROUS” MUTANTS IN ZEA MAYS L. [Abstract]

D. MARINKOVIĆ and M. ANDJELKOVIĆ

THE EFFECT OF RADIATION ON THE GENETIC LOADS AFFECTING THE VIABILITY, MATING ACTIVITY AND FERTILITY IN DROSOPHILA MELANOGASTER [Abstract]

S.E.A. YOUNIS

INTERACTION OF PATHOGENICITY GENES IN FUSARIUM MONILIFORME AND REACTION GENES IN ZEA MAYS [Abstract]

A.K.A. SELIM, A.A.M. OMAR and M.I. KHALIFA

INHERITANCE OF WAXINESS IN BARLEY [Abstract]

Vera MARKOVIC, P. KALICANIN, Slavka MORIC-PETROVIĆ and Stefanija MARKOVIC

ENLARGED SHORT ARM ON A CHROMOSOME G IN TWO FAMILIES OF PATIENTS WITH DOWN'S SYNDROME [Abstract]

V. JOVANOVIC and L. ATKINS

KARYOTYPES OF TWO NORTH AMERICAN BUNTINGS (AVES, EMBERIZINAE) [Abstract]

Milena ĆIRIĆ

CYTOGENETICAL CHARACTERISTICS OF AN EHRLICH ASCITES TUMOR IN THE MOUSE [Abstract]

B. SOLDATOVIC, A. NEDOK and Mirjana MILOŠEVIĆ

THE PARTIAL A/D TRANSLOCATION OF A HUMAN KARYOTYPE [Abstract]

Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 105-113

Serbia

Original scientific paper

ASSOCIATION STUDIES BETWEEN SOME CHARACTERS IN BARLEY

A. K. A. SELIM, A. A. M. OMAR, and L. R. M. MOHAMED

Faculty of Agriculture AIN SHAMS Univ., Cairo and Department of Agriculture, Giza, Cairo, U.A. R.

Abstract

Selim, A.K.A., Omar, A.A.M., and Mohamed, L.R.M. (1969): Association studies between some characters in barley. - Genetika, Vol. 1, No. 2, 105-113.

The present work represents an attempt to study the relationships among five characters studied in the F₂ generations of eleven crosses among six barley varieties. Tests for associations between the characters studied showed no associations between number of rows and each of the characters: growth habit, awnedness, kernel colour and hulledness. Earliness showed no associations with growth habit and also kernel colour with each of the two characters (awnedness and hoodedness) and hulledness. However, significant associations were observed between number of rows and (awnedness and hoodedness) giving a recombination value of 2.86 ± 0.79% in the cross North Carolina Hooded x Tridax, number of rows and kernel colour in the cross Bonus x Tridax giving a recombination value od 38.76±3.43%, number of rows and hulledness in the cross C. I. 5632 x Bonus showing recombination value of 32.31±8.43%. Associations were noticed also between earliness and growth habit with a recombination value of 12.45±5.04% in the cross Bonus x Tridax, a recombination value of 18.98 ± 4.72% in the cross Torusuando x Tridax, and a recombination value of 22.2±3.44% in the cross Torusuando x North Carolina Hooded.

Some other associations were significant but were unsuitable for calculating recombination values such as that between number of rows and (awnedness and hoodedness) in the cross Bonus x Tridax and that between earliness and growth habit in the cross Torusuando x Tridax.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 115-121

Serbia

Original scientific paper

A CONTRIBUTION TO THE STUDY OF INDUCED SOMATIC MUTATIONS IN THE JONATHAN APPLE

P. MIŠIĆ and Ž. TEŠOVIĆ

Institut za voćarstvo - Čačak

Abstract

Mišić, P. and Tešović, 2. (1969): A contribution to the study of induced somatic mutations in the Jonathan apple. - Genetika, Vol. 1, No. 2, 115-121.

A method of acute gamma irradiation with doses of 1500, 3000, 4500, 6000 and 10000 r has been used with the aim of improving the cultivated Jonathan apple. On the basis of an investigation of the behaviour of the vegetative progeny of Jonathan, raised by irradiation, the following conclusions may be drawn: 1) the doses of 1500 and 3000 r induced sports - the mericlinal and periclinal chimaeras - with, a dark red skin; 2) the fruits of these sports had larger amounts of anthocyanins than the control fruits and a greater number of colored vacuola in the fruit epidermis; 3) the threes raised by irradiation with 3000 r gave lower yields than the control trees.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 123-129

Serbia

Original scientific paper

LOCATING GENES DETERMINING RESISTANCE TO FUSARIUM STALK-ROT IN MAIZE

S. E. A. YOUNIS

Alexandria University, Faculty of Agriculture, Genetics Department, Alexandria, Egypt

Abstract

Younis, S. E. A. (1969): Locating genes determining resistance to Fusarium stalk-rot in maize. - Genetika, Vol. 1, No. 2, 123-129.

The chromosome location of genes conditioning resistance to stalk-rot disease in corn caused by F. moniliforme was investigated in the highly susceptible line 57/75 and the highly resistant one Syn. 61C. Twenty reciprocal translocations were used to determine which chromosome arms carry the resistant genes. Artificial inoculation was by the toothpicks method of inoculation and the reaction to F. moniliforme was obtained by rating individual plants for spread of rot within the inoculated internode. Genes that are associated with resistance were found in the long arm of chromosome 10 and the short one of number 7. A third gene may be located in the short arm of chromosome 2 or 3 or, perhaps, one in each of them.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 131-138

Serbia

Original scientific paper

CYTOGENETIC CHARACTERISTICS OF INDUCED “VIVIPAROUS” MUTANTS IN ZEA MAYS L.

A. TAVČAR and Vlasta KENDJELIĆ

Zavod za genetiku i oplemenjivanje bilja Poljoprivredni fakultet, Zagreb

Abstract

Tavcar, A. and Kendjelic, Vlasta (1969): Cytogenetic characteristics of induced “viviparous” mutants in Zea mays L. - Genetika, Vol. 1, Kb. 2, 131-138.

After gamma irradiation of the kernels of one inbred line of Zea mays indentata, some dwarf mutants developed with the following characteristics: a tassel branch was present on one side of a knot on the main stalk of the plant; a branch with 5-8 small ears is present on the other side of the same knot; at the base of each ear are short roots. If such ears are transplanted to fertile soil, new plants similar to the parents develop.

Most cytogenetical abnormalities from such plants are syncytes in which the plasmodium has long threads and a large number of nucleoli. The long threads probably originate from connection of the pachytene chromosomes and the large numbers of nucleoli probably arise from reciprocal affinity of their ribonucleic acids. The “vivipary” is recessively inherited. Different abnormalities are present in the chromosomes of sporocytes.

The cytogenetical constitution of the mentioned Zea mays plant is especially interesting from the evolutionary point of view.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 139-145

Serbia

Original scientific paper

THE EFFECT OF RADIATION ON THE GENETIC LOADS AFFECTING THE VIABILITY, MATING ACTIVITY AND FERTILITY IN DROSOPHILA MELANOGASTER

D. MARINKOVIĆ and M. ANDJELKOVIĆ

Institut za biološka istraživanja, Beograd

Abstract

Marinkovic, D. and Andjelkovic, M. (1969): The effect of radiation on the genetic loads affecting the viability, mating activity and fertility in Drosophila melanogaster. Genetika, Vol. 1, No. 2, 139-145.

Two groups of individuals of D. melanogaster were exposed to a radiation treatment of 1000r and 2000r, and the amount of concealed genetic loads was measured at their second chromosomes. The effect of the recessive mutations produced was measured in three important components of fitness, namely as a decrease of viability and fertility, and a reduction in mating activity of the individuals homozygous for second chromosomes.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 147-153

Serbia

Original scientific paper

INTERACTION OF PATHOGENICITY GENES IN FUSARIUM MONILIFORME AND REACTION GENES IN ZEA MAYS

S.E.A. YOUNIS

Atomic Energy Establishment, Radiobiology Dept., Genetics Lab., Cairo, U.A.R.

Abstract

Younis, S.E.A. (1969): Interaction of pathogenicity genes in Fusarium moniliforme and reaction genes in Zea mays. - Genetika, Vol. 1, No. 2, 147-153.

Corn stalk-rot disease causes drastic losses in the yield of corn. Different locations differ in the prevalence of their pathogens. Consequently, a resistant corn line in one location could be susceptible in another. On the other hand, when the host genotype changes towards increase in resistance, the pathogen will respond in a similar way by an increase in pathogenicity so that the balance is restored.

It seemed important to select (in local environments) resistant lines which can resist the prevalent races of the local pathogen. Ten local, 6 American lines, and 2 synthetic varieties have been used in these studies. Moreover, four F. moniliforme races were isolated from different locations of the Egyptian Delta and used for artificial inoculation.

The results showed highly significant differences among the corn lines with respect to resistance to stalk-rok disease and the pathogen races differed significantly in their pathogenicity.

Significant host-parasite interactions were also obtained which could be explained by the gene for gene hypothesis where each gene conditioning reaction of the host corresponds to a specific gene conditioning pathogenicity of the parasite. Therefore, for the breeding programmes for disease resistance, the corn line that proves to be resistant to different races of the pathogen is expected to persist for a longer time.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 155-164

Serbia

Original scientific paper

INHERITANCE OF WAXINESS IN BARLEY

A. K. A. SELIM, A. A. M. OMAR and M. I. KHALIFA

Department of Genetics, Ain Shams University and Department of Agriculture, Ministry of Agriculture, Cairo, U.A.R.

Abstract

Selim, A. K. A., Omar, A. A. M., and Khalifa, M. I. (1969): Inheritance of waxiness in barley. - Genetika, Vol. 1, No. 2, 155-164.

The aim of the present investigations was to study the genetic behaviour of waxiness in thirteen crosses of barley including 10 varieties belonging to three botanical species. Waxiness appeared to be governed by five pairs of genes. The gene (Wx) for waxiness was carried by the varieties Japan. 3, C.I. 8566, C.I. 8570, C.I. 8698 and C.I. 8760. The genes (Wx, and Wx₂) for norywaxi-ness which complemented the effects of each to give semi-waxiness were located in the variety Bonus. There were another two complementary genes (Wx₃ and Wx,) for npn-waxiness, which existed in the variety C. I. 2225. The interaction between these four dominant genes gave waxiness. The recessive genes cause non-waxiness, where gene (wx) was located in Giza 117, and genes wx, wxj wxi) were present in Baladi 16 and C. I. 6713.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 165-175

Serbia

Original scientific paper

KARYOTYPES OF TWO NORTH AMERICAN BUNTINGS (AVES, EMBERIZINAE)

V. JOVANOVIC and L. ATKINS

Museum of Comparative Zoology Harvard University Cambridge, Massachusetts 02138

and

James Homer Wright Pathology Laboratories Massachusetts General Hospital Boston, Massachusetts 02114

Abstract

Jovanovic, V. and Atkins, L. (1969): Karyotypes of two North American buntings (Aves, Emberizinae). - Genetika, Vol. 1, No. 2, 165-175.

The karyotypes of two Nort-American buntings, Slatecolored Junco (Junco hyemalis) and Rufous-sided Towhee (Pipilo erythrophthalmus) are described. Diploid numbers and chromosome morphology of the previously studied species are compared with the results of the present study. Contrary to the common opinion that karyotypes of close by related bird species are very similar or identical, considerable differences in the size groupings and morphology of the chromosomes were discovered.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 177-183

Serbia

Original scientific paper

ENLARGED SHORT ARM ON A CHROMOSOME G IN TWO FAMILIES OF PATIENTS WITH DOWN'S SYNDROME

Vera MARKOVIC, P. KALICANIN, Slavka MORIC-PETROVIĆ and Stefanija MARKOVIC

Institute for Mental Health, Human Cytogenetic Laboratory, Palmotićeva 37, Beograd, Yugoslavia

Abstract

Markovic, Vera, Kalicanin, P., Moric-Petrovic, Slavka and Markovic Stefanija (1969): Enlarged short arm on a chromosome G in two families of patients with Down's syndrome. - Genetika, Vol. 1, No. 2, 177-183.

From 120 families of mongoloid children cytogenetically examined in our laboratory, we discovered two cases of familial occurrence of an enlarged short arm on one of the G group chromosomes. In the first family the chromosome with the enlarged short arm was discovered in the proband, his mother and sister. In the second one in the proband and her mother. This structural anomaly was not followed by the abnormal phenotypic effect in the relatives of persons with Down's syndrome.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 185-191

Serbia

Original scientific paper

CYTOGENETICAL CHARACTERISTICS OF AN EHRLICH ASCITES TUMOR IN THE MOUSE

Milena ĆIRIĆ

Institute for Medical Research, Novi Sad

Abstract

Ciric Milena (1969): Cytogenetical characteristics of an Ehrlich ascites tumor in the mouse. - Genetika, Vol. 1, No. 2, 185-191.

An Ehrlich-ascites tumor in the mouse was the subject of this work. Chromosomal analyses performed on 15 tumor samples of different transplant generations revealed an aneuploid karyotype with the modal number in the hypotetraploid region. Markers were in all cells. Besides a metacentric marker minutes were detected which had not been found previously in so great a number in this strain of Ehrlich ascites tumor.

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Published in „GENETIKA“ Vol. 1, No.2 (1969), pp. 193-198

Serbia

Original scientific paper

THE PARTIAL A/D TRANSLOCATION OF A HUMAN KARYOTYPE

B. SOLDATOVIC, A. NEDOK i Mirjana MILOŠEVIĆ

Institut za biološka istraživanja, Beograd Dijagnostički centar, Beograd

Abstract

Soldatović, B., Nedok, A. and Milošević Mirjana (1969): The partial AID translocation of a human karyotype. - Genetika, Vol. 1, No. 2, 193-198.

The karyotype of a girl, suspected to have the Turner syndrome with some symptoms of PPH (pseudo-pseudohypopara-thyreoidismus) has been analysed. Unexpectedly, in all metaphase figures a partial translocation A/D was noticed and chromosome-formula was 46XX, t(3₀_D_Q+).

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