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Volume 24, Issue 6
Displaying 1-7 of 7 articles from this issue
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Osamu KAMIJIMA1974 Volume 24 Issue 6 Pages 261-268
Published: December 31, 1974
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSTo clarify the characteristics and classify the dwarf strains in rice is important for recognition of mode of action ofdwarf genes and usefull for rice-breeding program. It was already found that there are different patterns in relative length of internodes in dwarf strains, and the pattern has been used for their classification. Recently, the principal component analysis has become to be noticed as a convenient method to analyse many characters simultaneously, and has been used by several workers for classification of the varieti es in order to look for usefull breeding materials or to investigate variations in plant types. The present study was attempted to clarify the variations of relationships arnong the lengths of panicle, upper five internodes and residue in the culrn and to classify many dwarf strains of rice using the principal component analysis. Materials used in the experiment were 76 dwarf, 22 normal, and 5 tall giant strains of rice. Pheno-ypic correlations between seven characters men-tioned above were analysed in all 103 strains as well as in 76 dwarf strains. Eigen value, eigen vector, and contribution percentage of each principal component, and standerdized score of each strain were calculated.View full abstractDownload PDF (1000K) -
Satoru TOKUMASU, Masahiro KATO, Fumika YANO1974 Volume 24 Issue 6 Pages 269-276
Published: December 31, 1974
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSMost of the cultivated forms of geranium (Pelar-gowiwa) may be grouped into four horticultural classes, i.e., (1) zonal geranium, (2) show pelar-gonium, (3) ivy-1eaved geranium, and (4) scented-leaved geranium; the former three are used as ornamertals and the last one as aromatics. In general, geraniums are highly sterile and many of them set few or no seeds. Interspecific hybridization is alm-ost unsuccessful. The present study was underta-kento elucidate the behavior of pollen tubes in inter-and intrapollinations and to presume cross-affinity relationship among several species. After reciprocal crosses were made among different species, the behavior of pollen tubes in the style was observed with the aid of a fiuorescence microscope and fruit-and seed-set was examined.View full abstractDownload PDF (1554K) -
Kozo NISHIKAWA, Takashi MORI, Naomi TAKAMI, Yoshihiko FURUTA1974 Volume 24 Issue 6 Pages 277-281
Published: December 31, 1974
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSAs the Ne1 locus had already been located on the long arm of chromosome 5B (Zeven 1972), Chinese Spring ditelosomic for 5BL (ne 1/ne 1 ne 2/ne 2) was crossed with Prelude (Ne 1/Ne 1 ne 2/ne 2) and the resulting F1's monotelodisomic for 5BL and heterozygous for the Ne 1 locus were testcrossed to Atlas 66 (ne 1/ne I Ne 2/Ne 2). The Ne1-centro-mere distance obtained from combined data of necrosis phenotypes and chrolrfosome comple-ments was 10.5±2.0 map units. From the results of crosses including the necrosis testers, Prelude and Atlas 66, the line monotelosomic for 2BL-ditelosomic for 2BS of Chinese Spr-ing was confirmed to carry Ne 2 on telosome 2BS. Then, F1's monotelodisomic for 2BS and heterozygous for the Ne 2 Iocus which were derived from the cross, monotelo 2BL-ditelo 2BS×disomic Chinese Spring were test-crossed with Triticum durum LD 222 (Ne 1/ Ne 1 ne 2/ne 2). The Ne 2-centromere dis-tance obtained was 9.4±1.5 map units.View full abstractDownload PDF (696K) -
Megumi SAWA1974 Volume 24 Issue 6 Pages 282-286
Published: December 31, 1974
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSIn order to restore the cornplete sterility of F1 hy-brids from the cross Phaseolus radiatus L. cv.“Merryokuto”× P.calcaratus ROXB, endemic narne“Bakaso”, colchicine ranolin method (0.1%) was applied to the buds of 10 F1 clones, and 14 seeds were obtained from one clone treated. Then, the 11 amphidiploid plants in C1 generation were com-pared with the parents and F1s from morphological and cytological viewpoint. Incidentally speaking, though“Bakaso”was treated as a semi-wild relative of the adzuki bean in my previous paper (1973), it was later identified with a local variety of rice bean, P.calcaratus ROXB.View full abstractDownload PDF (868K) -
Senchi MURAYAMA, Takeshi OMURA, Kiyomatsu MIYAZATO1974 Volume 24 Issue 6 Pages 287-290
Published: December 31, 1974
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSF1 hybrids of eleven cross combinations were tested under 4 different cultural conditions, i.e., standard fertilizer-level with standard planting density (plot A), standard fertilizer-level with high planting density (plot B), high fertilizer-1evel with standard planting density (plot C), and high fertilizer-1evel with high planting density (plot D). The F1 hybrids of Norin 22×Araki, Suzu-nari×Zenith CI 7787 and Aikoku×Zenith CI 7787 showed marked heterosis in grain yield. Within the scope of the present experiment, the best cross combination was Suzunari × Zenith CI 7787 which significantly outyielded the highest yielding variety, Benisengoku. It was concluded that practical utilization of heterosis would be possible in rice, if hybrid seeds could be economically produced. In grain yield, spikelet number per panicle and culm length, the degrees of heterosis obtained under the four conditions were signifi-cantly correlated with one another.View full abstractDownload PDF (555K) -
ToShio SHIGA, Kenji TAKAYANAGI, Jung I. LEE, Masashi SAITO1974 Volume 24 Issue 6 Pages 291-297
Published: December 31, 1974
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSWe have investigated the fatty acid composition of rapeseed oil of varidus cultivars (LEE et al. 1974 a) and tried to introduce zero erucic acid genes, el and e2, into Japanese rape varieties (LEE et al. 1974 b). Through these experiments we got various correla-tion coefficients of the major component fatty acids, i. e. oleic, Iinoleic, Iinolenic, eicosonoic and erucic acids. Although oleic and erucic always showed highly negative correlation there were some discrepancies in other correlation coefficients between the pairs of fatty acids so far published (Table 1). 1) Between oleic and linoleic we got positive or no correlation while the others were negative. 2) Between oleic and linolenic our correlation coefficient varied from positive to negetive while the others were negative. 3) Between oleic and eicosenoic, and eicoslnoic and erucic, the correlation coefiicients varied from positive to negative both in ours and in others. To explain these discrepancies, original data (LEE, et al. 1974 b) were discriminated by E'1 and E'2 geno-types each other, and the corirelation coefiicients of them were calculated separately as showen in Table 2. For easier understanding we expreessed the interrelationships between fatty acids of different genotype in F2 Segregants in Figures 1 to 7 discrim-inately.View full abstractDownload PDF (871K) -
[in Japanese]1974 Volume 24 Issue 6 Pages 298-302
Published: December 31, 1974
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSDownload PDF (598K)
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