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Volume 52 (1977)
- Issue 6 Pages 417-
- Issue 5 Pages 327-
- Issue 4 Pages 261-
- Issue 3 Pages 171-
- Issue 2 Pages 87-
- Issue 1 Pages 1-
Volume 52, Issue 3
Displaying 1-9 of 9 articles from this issue
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YASUO NAKAI1977 Volume 52 Issue 3 Pages 171-181
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSThe esterase isozymes and protein profiles of the diploid and corresponding autotetraploid strains of some wild and cultivated plants were investigated using the gel isoelectrofocusing method.
The esterase zymogram changed with the age of seedlings. The diploid and autotetraploid strains of Oryza sativa cv. Shinriki-mochi had the same zymogram in one day-old seedlings, but their zymograms showed clear differences in older seedlings.
Comparison of the diploid and corresponding autotetraploid strains revealed that three different relationships exist among the zymograms. In the first group, the diploids and autotetraploids had the same pI bands with the same activities. In the second they had the same pI bands, but the activities of some bands were higher in the autotetraploids than in the diploids. In the third group the diploids and autotetraploids had some bands of different pI values. Frequencies of the strains belonging to the three groups were 35, 50 and 15%, respectively.
In the protein profile, the same relationships were found in the diploids and their autotetraploids, as were found in the esterase zymogram. The results demonstrate that the duplication of chromosomes by autotetraploidy brought about quantitative and, in certain instances, qualitative differences in the esterase zymogram and protein profile.View full abstractDownload PDF (1901K) -
MITSURU MINEZAWA, NOBORU WAKASUGI1977 Volume 52 Issue 3 Pages 183-195
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSMorphological, genetical and developmental studies were performed on a mutant, Black at hatch (Bh), in the Japanese quail. (1) In newly hatched Bh-type chicks, there was intermingling of black and yellow pigments in the dorsal down feathers. In the Bh-type adult feathers, yellow and black bands on the webs were narrow and large in number. Some feathers are devoid of these bands and show intermediate colouration between black and yellow. (2) Genetical analysis has shown that the Bh-character is controlled by an autosomal dominant gene with homozygous lethality and that there are no linkage between Bh-locus and the other four autosomal loci, Y (yellow), W (white), S (silver) and we (white egg-shell). (3) Embryological investigation has demonstrated that the homozygous embryos for Bh-gene die at 4-6 days of incubation, showing whole body haemorrhage, degeneration of liver tissue, less well-developed eyes and occasionally less well-developed limbs and tails.View full abstractDownload PDF (1492K) -
SATORU TOKUMASU, FUMIKA YANO, MASAHIRO KATO1977 Volume 52 Issue 3 Pages 197-205
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSIn several Pelargonium species, esterase, peroxidase and acid phosphatase isozymes of anthers were studied electrophoretically using the polyacrylamide gel isoelectrofocusing technique. The plants examined consist of three horticultural classes, i.e., zonal geraniums, show pelargoniums, and scented-leaved geraniums. Within each class, the variation of isozyme patterns among species or cultivars was comparatively small. The show pelargoniums and the scented-leaved geraniums were similar to each other in isozyme patterns, but the zonal geraniums were different from the above two classes. As to the show pelargoniums, different opinions about their polyploidy and their basic chromosome number are known in the literature. The present authors cytologically support an opinion that the show pelargoniums are tetraploids with 11 basic chromosome number. This was indirectly evidenced from the isozyme similarity between the show pelargoniums and the scented-leaved geraniums. It is concluded that the show pelargoniums and the scented-leaved geraniums are genetically and phylogenetically close to each other, and the zonal geraniums are remote from them.View full abstractDownload PDF (866K) -
EIICHI INAGAKI, MASAYUKI UCHIBORI, TOMIO MIYAMOTO, KAZUO FUJIKAWA, YOS ...1977 Volume 52 Issue 3 Pages 207-216
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSThe frequency patterns for the different kinds of dumpy mutations induced by X-rays in successive stages of spermatogenesis were studied by making two-day brood changes with 3 females per male per brood. With this mating procedure, mature sperms are probably sampled in brood A, late spermatids in brood B, early spermatids and presumably late spermatocytes in brood C, early spermatocytes in brood D.
The experimental results obtained indicate that (i) the over-all frequencies of recovered complete dumpy mutations are relatively similar in broods A and B, begin to increase gradually in brood C, reach its highest level in brood D and decline sharply in brood E; (ii) the frequency patterns for the (ol, lv) and (ov, olv) exceptions over the five sampling broods are practically similar to that observed in the total dumpy mutations; (iii) no such differences in brood-mutation pattern are found, however, with respect to the yield of the (o, v) types; (iv) the over-all frequencies of recovered fractional dumpy mutations appear to be relatively steady from stage to stage, although the majority of the fractionals are of the o and v types.
These findings indicate that the different kinds of dumpy exceptions may be differentially affected under different germ cell stages of maturity. Probably, this might represent a difference between point mutations and breakage events.View full abstractDownload PDF (930K) -
JIN-HO SON1977 Volume 52 Issue 3 Pages 217-221
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (1071K) -
I. GENE EXCHANGE AND GENETIC DISTANCE BETWEEN PAPIO ANUBIS, PAPIO HAMADRYAS AND THEIR HYBRID1)TAKAYOSHI SHOTAKE, KEN NOZAWA, YUICHI TANABE1977 Volume 52 Issue 3 Pages 223-237
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSIn central Ethiopia the hamadryas baboon, Papio hamadryas and the anubis baboons, Papio anubis, have been hybridizing naturally. Studies were made by using electrophoretical blood protein variations as markers in order to clarify the genetic interrelationships between them. A total of 414 individuals belonging to 7 populations were examined for 35 blood protein loci. Eleven of 35 loci showed polymorphism. The Tf locus was found to have the strongest power for discriminating between the anubis and the hamadryas. The results of our genetic survey revealed that most of the populations from which we collected blood samples were more or less hybridized. The Nei's (1975) genetic distance between the two species was estimated to be at most as 0.0674. As this value was too small to consider these species as real biological species, we think that the natural hybrid zone is fairly wide and still expanding now.View full abstractDownload PDF (2032K) -
TADAO MATSUDA, RYUSO TANAKA1977 Volume 52 Issue 3 Pages 239-246
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSThe B-chromosomes of Tainia laxiflora behaved regularly like the ordinary chromosomes in both meiotic division of PMC and in the successive mitotic divisions. As a result, most of the male gametes are presumed to carry the B-chromosomes. The regular meiotic and mitotic behavior of B-chromosomes is considered to be a major cause of the high occurrence of the clones with B-chromosomes in this species.View full abstractDownload PDF (2174K) -
TAKEO HONDA, HIROSHI SUZUKI, MASAHIRO ITOH1977 Volume 52 Issue 3 Pages 247-249
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (1082K) -
MASAO KIMURA, SHIN-ICHI ITO, YONEHARU MORISHIMA, IWAHIRO ISOGAI1977 Volume 52 Issue 3 Pages 251-255
Published: 1977
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (868K)
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