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Volume 23 (1948)
- Issue 5-6 Pages 71-
- Issue 1-4 Pages 64-
Volume 23, Issue 5-6
Displaying 1-10 of 10 articles from this issue
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Tomowo Ono1948 Volume 23 Issue 5-6 Pages 71-76
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSThe first leaf of seedlings in cereals shows two different modes of folding i. e. right- and left-handed (cf. Diagram 1). The present paper deals with the statistics of such R- and L-grains on the ear in two-rowed barley. Results obtained are summed up as follows:
1. There are three regular type ears with regard to the numbers of R- and L-grains in odd and even row of the ear;
a) parallel or P-type RO/LO:RE/LE=n/m:n/m
b) cross or C-type _??_=n/m:m/n
c) equal or PC-type _??_=m/m:m/m
The others, however, show some irregularities in the numbers of R- and L-grains in each row of the ear, such as y/x:w/z. But these irregular type ears may be shifted to the regular ones, if we adjust one or more grains in each row from R to L or vice versa. Hence we may have several kinds of modified P-, C- and PC-types (e. g. P1-, P2-, C1-, C2-, P1C1-, P2C2-……) according to the degrees of modifications, as being exampled in Diagram 2 and Table 2.
2. Series of the regular and modified P-, C- and PC-types obtained and their frequencies in a total of 194 standard ears are given in Table 2. It is noticeable that the parallel type ears occur more. frequently than the cross type ones, the ratio being 60.1:36.7.
3. From the results above mentioned, it may be confirmed that the numbers of R- and L-grains in odd and even row of the ear in two-rowed barley show a definite relation, indicating as RO.LO=RE.LE, althogh exceptional cases are found.
4. Both even and odd rows in the ear generally gave an excess of R- type grains, the percentage being 56.7 (Table 1).View full abstractDownload PDF (578K) -
Rinsuke Kanezawa, Masashi Go1948 Volume 23 Issue 5-6 Pages 77-81
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSThe morphological changes in relation to chromosome doubling were discussed, especially on size and number of stomata in 7 species (Table 1) of tetraploid forest trees which were induced by colchicine treatments in the spring of 1942.
(1) Generally speaking, stoma size increases and stoma number decreases according to the chromosome doubling in the same individual, but forest trees show greatindividual variation, so it is not safe to compare the morphological changes in a small number of different individuals.
(2) When chromosome doubling is confined to epidermis or tetraploid sector, it cannot be concluded by only morphological changes whether the tree is totally tetraploid or not.
(3) Moreover, it may be considered that large stomata will be found at the leaves of first year's growth in the treated seedligs, but will become small according to acclimation as the years go by.
From the above, it is clear that size and number of stomata are helpful in a preliminary survey of polyploidy, but are not its absolute indices.View full abstractDownload PDF (570K) -
Yoshiwo Katayama1948 Volume 23 Issue 5-6 Pages 82-85
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSThis paper deals with the genetic segregation of gynodioecious individuals found in a strain of castor-bean, Ricinus communis L. Some pedigrees from the natural pollination of these individuals segregated female plants in various grades as seen in Table 1. In one case, tehe prcentage became about 48. From the selfing of nomal individuals in these pedigrees, females were resulted as 15% (Table 2). On the other hand, many of the previous females were also pollinated by the pollen from the normal individuals in the same pedigree. The F1, thus obtained, segregated females denoting 36% as in Table 3. From these results it was mentioned that the female just acted as a simple recessive factor.View full abstractDownload PDF (427K) -
B. Barley (Hord um sativum) (a). Inheritance of the awn length and the quantitative function of the causal genes in their length determination. I. On the quantitative function of the four inhibitors and the genes N1, N2 and MKatumi Syakudo1948 Volume 23 Issue 5-6 Pages 85-90
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (667K) -
Yasusi Hosino1948 Volume 23 Issue 5-6 Pages 90-95
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSVery slight individual variations, apparently genetic in nature, are found in the relative size of spots in a subtype of suc inea. By selection some strains practically uniform in this character may be established. In such strains some individuals having a new character may appear. As such individuals often breed true, this change should be regarded as mutation.View full abstractDownload PDF (680K) -
Chozo Oshima1948 Volume 23 Issue 5-6 Pages 96-103
Published: 1948
Released on J-STAGE: May 21, 2007
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Chromosome Morphology in Lilium. IIMasao Kumazawa, Motoo Kimura1948 Volume 23 Issue 5-6 Pages 103-104
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (194K) -
Goichi Nakajima1948 Volume 23 Issue 5-6 Pages 104-105
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (224K) -
Kotaro Karasawa1948 Volume 23 Issue 5-6 Pages 105-106
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (212K) -
A. Rice (Oryza sativa L.) a. Inheritance of the length of panicles and the quantitative function of the causal genes in their length determination. 2. On the quantitative function of the genes P2, P3 and K'aKatumi Syakudo1948 Volume 23 Issue 5-6 Pages 107-108
Published: 1948
Released on J-STAGE: May 21, 2007
JOURNAL FREE ACCESSDownload PDF (235K)
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