scholarly journals INHERITANCE OF A TEMPERATURE-SENSITIVE YELLOW FOLIAGE CHARACTER IN RUSSIAN WILD RYEGRASS

1975 ◽  
Vol 55 (3) ◽  
pp. 709-710
Author(s):  
T. LAWRENCE
Keyword(s):  
Gene Symbol ◽  
Temperature Sensitive ◽  
Breeding Line ◽  
Green Color ◽  
Normal Green ◽  
Foliage Character

Segregation in populations derived by crossing heterozygous plants of Russian wild ryegrass (Elymus junceus Fisch.) (breeding line Sc. 25317) showed that the temperature-sensitive yellow foliage character carried by this population is monogenic and recessive. The temperature-sensitive plants were yellow when grown at about 10 C, but a normal green color when grown at higher temperatures. The gene symbol ty1 has been proposed for this character.

INHERITANCE OF A YELLOW FOLIAGE CHARACTER IN RUSSIAN WILD RYEGRASS

1974 ◽  
Vol 54 (4) ◽  
pp. 659-660
Author(s):  
T. LAWRENCE
Keyword(s):  
Green Plant ◽  
Gene Symbol ◽  
Normal Green ◽  
Foliage Character

Segregation in populations derived by crossing Sc. 260180, a yellow foliaged plant of Russian wild ryegrass (Elymus junceus Fisch.) and Sc. 25311, a normal green plant, showed the yellow foliage character carried by this population to be monogenic and recessive. The gene symbol y1 has been proposed for this character.

scholarly journals New Alleles, rkcd and rkp, at the Red Kidney Locus for Seedcoat Color in Common Bean

2003 ◽  
Vol 128 (4) ◽  
pp. 552-558 ◽  
Author(s):  
Mark J. Bassett ◽  
Phillip N. Miklas
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Gene Symbol ◽  
Recurrent Parent ◽  
Breeding Line ◽  
Genetic Investigation ◽  
Dry Bean ◽  
Pink Color ◽  
Growing Conditions ◽  
New Alleles

Among light red and dark red kidney common bean (Phaseolus vulgaris L.) varieties, pink seedcoat color (light red kidney) is dominant to dark red, but when Red Mexican varieties (with dark red seedcoats) are crossed with dark red kidney varieties, dark red seedcoat is dominant to the pink segregants observed in an F2 population. A genetic investigation of this reversal of dominance was performed by making crosses in all combinations among standard varieties of the four recessive-red market classes—Light Red Kidney `California Early Light Red Kidney', Pink `Sutter Pink', Red Mexican `NW 63', and Dark Red Kidney `Montcalm'—and observing segregation for seedcoat colors in F2 and F3 progenies. The data were consistent with the hypothesis that `NW 63' carries a new allele at Rk, viz., rkcd, where cd stands for convertible dark red kidney. Thus, C rkcd expresses dark red kidney seedcoats and cu rkcd expresses pink seedcoats. Also, C B rkcd expresses garnet brown seedcoats, whereas C B rkd expresses liver brown seedcoat color. Thus, we propose the gene symbol rkcd for the Rk locus gene in `NW 63'. The rk gene from Light Red Kidney `Redkloud' and `Sutter Pink' was backcrossed (with cu b v) into the recurrent parent 5-593, a Florida dry bean breeding line with seedcoat genotype P [C r] J G B V Rk. In the F2 progenies of BC2 to 5-593, the cu b v rk segregants from `Redkloud' gave true pink seedcoats, whereas those derived from `Sutter Pink' gave consistently very weak pink color under humid Florida growing conditions. We propose the gene symbol rkp, where p stands for pale pink, for the distinctive rk allele in `Sutter Pink'. The more general implications of the above findings were discussed.

Chlorosis of planted Engelmann spruce seedlings unrelated to nitrogen content

1970 ◽  
Vol 48 (5) ◽  
pp. 851-853 ◽  
Author(s):  
Frank Ronco
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Deficiency ◽  
Picea Engelmannii ◽  
Direct Sunlight ◽  
Green Color ◽  
Engelmann Spruce ◽  
Normal Green ◽  
Growing Conditions

Shade-tolerant Engelmann spruce (Picea engelmannii Parry) seedlings generally became chlorotic when exposed to direct sunlight under several different growing conditions, whether grown in pots, in plantations, or in transplant beds at high or low elevations. Shaded seedlings under the same growing conditions remained a normal green color. Chlorosis was attributed to solarization, not to nitrogen deficiency. That conclusion was supported by the fact that the nitrogen content of shaded and unshaded seedlings was similar regardless of the growing conditions.

scholarly journals Mitotic mutants ofAspergillus nidulans

1975 ◽  
Vol 26 (3) ◽  
pp. 237-254 ◽  
Author(s):  
N. Ronald Morris
Keyword(s):  
Aspergillus Nidulans ◽  
Nuclear Division ◽  
Complementation Group ◽  
Gene Symbol ◽  
Temperature Sensitive ◽  
Restrictive Temperature ◽  
Temperature Sensitive Mutants ◽  
Ofaspergillus Nidulans ◽  
Complementation Groups ◽  
Genetic Clustering

SUMMARYForty-five temperature-sensitive mutants ofAspergillus nidulanswhich are defective in nuclear division, septation or distribution of nuclei along the mycelium have been isolated, and most have been subjected to complementation analysis and mapped to chromosome. Thirty-five of the mutants were unable to complete nuclear division at the restrictive temperature. Twenty-six of these mutants exhibited a co-ordinate drop in both spindle and chromosome mitotic indices at 42 °C, indicating that they fail to enter mitosis. These mutants have been assigned to the gene symbolnim. Nine mutants exhibited a co-ordinate rise in spindle and chromosome mitotic indices at 42 °C, indicating that they are arrested in mitosis. These mutants were assigned the gene symbolbim. Five mutants failed to form septa and were given the gene symbolsep; and five mutants had an abnormal nuclear distribution and were given the gene symbolnud. All of the mutations were recessive. Most of the mutants were in different complementation groups. Mutants in the same complementation groups were phenotypically similar, but phenotypically similar mutants were not necessarily or usually in the same complementation group. There was no evidence for genetic clustering of phenotypically similar mutants. The mutants were located on all eight chromosomes.

INHERITANCE OF A VARIEGATED FOLIAGE CHARACTER IN RUSSIAN WILD RYEGRASS, ELYMUS JUNCEUS FISCH.

1974 ◽  
Vol 16 (2) ◽  
pp. 467-468 ◽  
Author(s):  
T. Lawrence
Keyword(s):  
Normal Plant ◽  
Normal Green ◽  
Two Factors ◽  
Foliage Character ◽  
Variegated Plant

Segregation in population derived by crossing heterozygous progeny of Sc.260181, a variegated plant of Russian wild ryegrass, and Sc.25311, a normal plant, showed a 12 normal green:3 variegated:1 albino ratio indicating inheritance according to the dominant epistasis pattern for two factors.

scholarly journals Flower Colors in Common Bean Produced by Interactions of the Sal and V Loci and a Gametophyte Factor Ga Linked to Sal

1990 ◽  
Vol 115 (6) ◽  
pp. 1029-1033
Author(s):  
Mark J. Bassett ◽  
Xue Lin-Bao ◽  
L. Curtis Hannah
Keyword(s):  
Common Bean ◽  
Flower Color ◽  
Marker Locus ◽  
Phaseolus Coccineus ◽  
Gene Symbol ◽  
Breeding Line ◽  
True Breeding ◽  
China Rose ◽  
Progeny Tests ◽  
Selection For

Inheritance of red flower color was investigated in crosses using Lamprecht's lines M0169 and M0056, which are derived from Phaseolus coccineus L., and Univ. of Florida P. vulgaris L. breeding line 5-593. Based on segregation in the F2populations from 5-593 × M0169 and 5-593 × M0056, we hypothesize that the genotypes for flower colors are sal/sal V/V for 5-593 and Sal/Sal v/v for M0169 and M0056. The backcross 5-593 × F, (5-593 × M0056) segregated for four flower colors in about equal frequencies, and F2, F3, and F4progeny tests of the backcross plants provided confirmation of all the genotypes in the digenic model. The two recombinant true-breeding colors/genotypes were white (sal/sal v/v) and china rose (Sal/Sal V/V). We hypothesize that the large deficiency of plants carrying the Sal allele in segregating populations is due to a gametophyte factor linked to Sal. We propose the gene symbol Ga for the gametophyte factor locus, which achieves complete selection for pollen carrying Ga on female plants carrying Ga, i.e., no pollen carrying ga achieves fertilization. The linkage between Ga and the marker locus Sal is 17 CM (centiMorgan).

scholarly journals A New Allele, tcf, at the T Locus for Partly Colored Seedcoats in Common Bean

1999 ◽  
Vol 124 (6) ◽  
pp. 663-665
Author(s):  
Mark J. Bassett ◽  
Lee Brady ◽  
Phil E. McClean
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Rapd Marker ◽  
Flower Color ◽  
Gene Symbol ◽  
Recurrent Parent ◽  
Breeding Line ◽  
Dry Bean ◽  
Color Restoration ◽  
T Locus

Common bean (Phaseolus vulgaris L.) plants with partly colored seeds and colored flowers were derived from PI 507984 in two genetic tester stocks, `2-points tcf BC1 5-593' and `2-points tcf BC2 5-593'. These stocks were produced by backcrossing to the recurrent parent, Florida dry bean breeding line 5-593, which has black self-colored seeds and purple flowers due to the genotype T P V. The crosses `2-points tcf BC1 5-593' × 5-593 and `2-points tcf BC2 5-593' × 5-593 produced F2 populations in which all plants had colored flowers. Those results, when considered with previously published work, do not support the previously reported hypothesis that the genes t Fcr Fcr-2 produce partly colored seedcoats and flower color restoration with t. The crosses `2-points tcf BC1 5-593' × `self-colored t BC2 5-593' and `2-points tcf BC2 5-593' × `minimus t BC3 5-593' produced F2 populations that segregated 3:1 for colored:white flowers, respectively. Those results are consistent with the revised hypothesis that tcf can produce partly colored seedcoats without affecting flower color. The RAPD marker OM19400, which is linked in repulsion to T, was used with the F2 populations from the crosses `2-points tcf BC2 5-593' × 5-593 and `2-points tcf BC2 5-593' × `minimus t BC3 5-593' and established that the tcf gene from PI 507984 is either an allele at T or tightly linked to T. F3 data from the cross `2-points tcf BC2 5-593 × 5-593 also support the tcf hypothesis. On the basis of the above experiments, the gene symbol tcf is proposed for an allele at T that pleiotropically produces partly colored seeds and colored flowers.

scholarly journals INHERITANCE IN NICOTIANA. I. STUDY OF THE GLAUCOUS AND THE YELLOW CHARACTERS IN N. TABACUM L.

1969 ◽  
Vol 18 (4) ◽  
pp. 443-462
Author(s):  
J. A. B. Nolla
Keyword(s):  
Single Factor ◽  
Green Is ◽  
Factor Pair ◽  
Green Color ◽  
Burley Tobacco ◽  
Normal Green ◽  
Yellow Color ◽  
White Burley

1. Two previously undescribed characters of N. tabacum are described and studied genetically. The yellow plant color appears to be distinct from similar deficiencies heretofore reported. It is not to be confused with the Burley character in White Burley tobacco. 2. Green color is dominant to yellow color. 3. Normal green is dominant to glaucous or "Ceniza". 4. Green and yellow are differentiated by a single factor pair which is designated Yy. 5. Normal green and Ce or glaucous plants are differentiated by two factor pairs; therefore segregation occurs in the proportion of 15 normal green to 1 glaucous (Ce). These are designated by Ce1 ce1 Ce2 ce2. 6. The factors for glaucous and for yellow are inherited independently of each other.

scholarly journals A New Recessive Allele at the C Locus for Seedcoat Color in Common Bean

1995 ◽  
Vol 120 (6) ◽  
pp. 896-899
Author(s):  
Mark J. Bassett
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Plant Introduction ◽  
Gene Symbol ◽  
Recessive Allele ◽  
Breeding Line ◽  
Allelism Test ◽  
The Cross ◽  
Black Seeds

The inheritance of a new allele, cv, at the C locus for seedcoat color was studied in common bean (Phaseolus vulgaris L.) using plant introduction (PI) accession 527774 as the source of cv. The cross PI 527774 (yellow-brown seed) x v BC25-593 (mineral-brown seed) genetic tester stock was studied in F1 and F2 progeny. An F3 selection from the above cross, designated F3 cv G b v, was crossed to 5-593 (a Florida breeding line with black seeds), and the F1, and F2 progeny were analyzed for color segregation. The second hackcross [S-593 x F1 (F3 cv G b v x 5-593)] was investigated in selfed progenies from 32 random BC2-F1 parents. Two of the BC2-F2 progenies were further tested in BC2,-F3. A third hackcross of cv to 5-593 was made and analyzed, and an allelism test of cv B V BC2-F35-593 with the cartridge huff cu BC3 5-593 genetic tester stock confirmed that cv is an allele at C. The gene symbol, cv, is proposed for the new allele because it is only expressed with V and gives a grayish-brown seedcoat. Genotypes with C/cv do not show heterozygous mottling with G B v or G b v, and there is no difference in seedcoat color between C G B v and cv G B v, or between C G b v and cv G b v.

Oncogenesis and the Lucké Virus

1968 ◽  
Vol 26 ◽  
pp. 200-201
Author(s):  
A. E. Vatter ◽  
J. Zambernard
Keyword(s):  
Rna Viruses ◽  
Vegetative State ◽  
Temperature Sensitive ◽  
Structural Level ◽  
Oncogenic Viruses ◽  
Dna Viruses ◽  
Leopard Frogs ◽  
Renal Adenocarcinoma ◽  
Induced Tumors ◽  
Northern Leopard Frogs

Oncogenic viruses, like viruses in general, can be divided into two classes, those that contain deoxyribonucleic acid (DNA) and those that contain ribonucleic acid (RNA). The RNA viruses have been recovered readily from the tumors which they cause whereas, the DNA-virus induced tumors have not yielded the virus. Since DNA viruses cannot be recovered, the bulk of present day investigations have been concerned with RNA viruses.The Lucké renal adenocarcinoma is a spontaneous tumor which occurs in northern leopard frogs (Rana pipiens) and has received increased attention in recent years because of its probable viral etiology. This hypothesis was first advanced by Lucké after he observed intranuclear inclusions in some of the tumor cells. Tumors with inclusions were examined at the fine structural level by Fawcett who showed that they contained immature and mature virus˗like particles.The use of this system in the study of oncogenic tumors offers several unique features, the virus has been shown to contain DNA and it can be recovered from the tumor, also, it is temperature sensitive. This latter feature is of importance because the virus can be transformed from a latent to a vegetative state by lowering or elevating the environmental temperature.

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