All issues
Volume 21, Issue 1
Displaying 1-9 of 9 articles from this issue
- |<
- <
- 1
- >
- >|
-
Takeo Sasahara, Shigesabro Tsunoda1971 Volume 21 Issue 1 Pages 1-8
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSSpecies with higher relative growth rates exhibited higher relative surface exposures at both plant and cellular levels. In meristematic cells enriched with cytoplasm, a decrease in cell-size brings about an increase in the ratio of cell surface area to cytoplasmic volume. In vacuolated cells, e.g., cortex and palisade parenchyma, an increase in cell-size with vacuolation brings about an increase in the ratio of cell surface area to cytoplasmic content. Rapid growth was associatd with higher leaf area ratio, smaller cell-size in meristematic cells, and larger cell-size in vacuolated cells.View full abstractDownload PDF (882K) -
Hiroshi Fujimaki, Masao Yokoo1971 Volume 21 Issue 1 Pages 9-12
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSBlast-resistant lines selected from several crosses between japonica and ilrdica varieties were proved to carry an identical gene for resistance. The significance of these experimental results was discussed from the standpoint of breeding for blast-resistance.View full abstractDownload PDF (538K) -
Rnsaburo Nakayama1971 Volume 21 Issue 1 Pages 13-18
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThe author has studied the genotype of cultivars of kidney beans for their seed-coat colours. The gene constitutions of eight varieties are reported here.View full abstractDownload PDF (783K) -
Nobuo Iwata, Takeshi Omura1971 Volume 21 Issue 1 Pages 19-28
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSBy employing reciprocal translocation method, ten out of twelve linkage groups have been assigned to the relevant chromosomes. In this paper, Iinkage groups corresponding to the chromosome 1, 2, 3 and 4 were discussed. New recessive genes, drp2, dp2, ops, eg and d10, were also demonstrated.View full abstractDownload PDF (1190K) -
Kazuo Nakata1971 Volume 21 Issue 1 Pages 29-34
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSTo determine if any competition exists among pollen grains for haploid tobacco plant formation by anther culture, observed ratio in types for leaf color in plantlets emerged from anthers, was compared with theoretical ratio.View full abstractDownload PDF (1293K) -
Masao Yokoo, Hiroshi Fujimaki1971 Volume 21 Issue 1 Pages 35-39
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSA tight linkage between blast-resistance and late maturity with a recombination value of 3.5±0.5% was observed in the progenies of several different japonica ×indica crosses in rice. The blast-resistance in the sixcrosses was controlled by the identical gene Pi-zt and the lateness in maturity was due to a photoperiod-sensitive gene. These two genes were linked with the genes for apiculus color and for digestibility of milled rice in dilute alkali, and were located in the linkage group I in rice. The significance of the tight linkage in practical rice breeding was discussed.View full abstractDownload PDF (610K) -
Hyoji Namai1971 Volume 21 Issue 1 Pages 40-48
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSIt is extremely difficult to obtain the hybrid seeds between the 10- and the 9-chromosome species in the genus Brassica by ordinary methods of crossing. However, the author succeeded in the hybridization with fairly high cross fertility through the application of grafting method, yielding three types of hybrid plants whose diploid number of chromosomes was 19, 28 38, respetively.View full abstractDownload PDF (2223K) -
Ch.M. Tahir, Koichiro Tsunewaki1971 Volume 21 Issue 1 Pages 49-51
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSOne effective fertility restorer in T. aestivum Giza 141 for the male sterile cytoplasm of Ae. ovata and 14 other very effective restorers for male sterile cytoplasm of T. timopheevi were discovered out of 38 hexaploid wheat varieties.View full abstractDownload PDF (415K) -
Ch.M. Tahir, Koichiro Tsunewaki1971 Volume 21 Issue 1 Pages 52-57
Published: February 28, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSTwelve F1 hybrids were produced by crossing cytoplasmically male sterile and fertility restorer lines of six Japanese common wheat varieties. When compared to the better normal parental varieties, majority of the F1 hybrids showed delayed heading, increased height and spikelet number and reduced seed fertility, 1, 000-kernel weight and grain yield. However, comparison of the F1 hybrids to the parental substitution lines revealed that some hybrids could exceed the better parental lines in agronomic characters including yield, though most were inbetween of the two parents. If detrimental effects of the male sterile cytoplasm are nullified by some means, heterosis in the form of increased yield can be expected from hybrid wheat varieties.View full abstractDownload PDF (817K)
- |<
- <
- 1
- >
- >|