scholarly journals The ketonic carotenoid canthaxanthin isolated from a colour mutant of Corynebacterium michiganense

1954 ◽  
Vol 57 (2) ◽  
pp. 273-275 ◽  
Author(s):  
S. Saperstein ◽  
M. P. Starr
Keyword(s):  
Colour Mutant

scholarly journals Identification and Genetic Analysis of a Thermo-sensitive Seedling-colour Mutant in Rice(Oryza sativa L.).

2001 ◽  
Vol 51 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Yanjun Dong ◽  
Wenqi Dong ◽  
Shouyun Shi ◽  
Qinsheng Jin
Keyword(s):  
Oryza Sativa ◽  
Genetic Analysis ◽  
Oryza Sativa L ◽  
Colour Mutant

scholarly journals Effective population size: the effects of sex, genotype, and density on the mean and variance of offspring numbers in the flour beetle, Tribolium castaneum

1980 ◽  
Vol 36 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Michael J. Wade
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Tribolium Castaneum ◽  
Black Body ◽  
Body Colour ◽  
Effective Population ◽  
Flour Beetle ◽  
Colour Mutant ◽  
Mean And Variance ◽  
The Mean

SUMMARYIn this paper I present the results of an experimental study of the effects of genotype and density on the mean and variance of offspring numbers in both sexes of the flour beetle, Tribolium castaneum. From the observed variance in offspring numbers the effective population size at several different densities is estimated using the methods of Crow & Morton (1955).I found that both the mean and variance of offspring numbers varied with genotype and density. In general, males were more variable in offspring numbers than females and this variability increased with density. Individuals homozygous for the black body colour mutant, b/b, were less variable in offspring numbers than + / + individuals, but the latter produced more offspring at most densities. As density increased, + / + individuals became more variable in offspring numbers whereas b/b individuals were less sensitive in this regard. These findings are discussed in relation to the ecology of selection at the black and closely linked loci.

Studies of the X chromosome of Anopheles albimanus

1985 ◽  
Vol 27 (1) ◽  
pp. 74-82
Author(s):  
J. A. Seawright ◽  
M. Q. Benedict ◽  
S. Narang
Keyword(s):  
X Chromosome ◽  
Organizer Region ◽  
Nucleolar Organizer Region ◽  
Nucleolar Organizer ◽  
Chromosome Analysis ◽  
Anopheles Albimanus ◽  
Eye Color ◽  
Colour Mutant ◽  
Translocation Breakpoints ◽  
Radiation Induced

Snow (sn) is a recessive, eye color mutant that is phenotypically indistinguishable from the previously described mutant, white eye (we). The loci for these mutants are over 30 map units apart on the X chromosome. Analysis of salivary gland chromosomes of radiation-induced X-autosome translocations were used to define the positions of sn and we on the distal euchromatic portion of the long arm of the X chromosome. A recessive lethal trait (bubble head) was also mapped relative to we and sn, and the gene order on the long arm of the X chromosome is as follows: centromere – ? – snow – bubble head – white eye. Translocation breakpoints in the euchromatic portion of the X chromosome caused sterility or lethality in males hemizygous for the translocations, but breaks in the heterochromatin had no effect. Crossing-over was greatly reduced when translocation breakpoints were located in the euchromatic part of the X chromosome. The translocations were used to determine that the nucleolar organizer region is probably on the short arm of the X chromosome.Key words: Anopheles albimanus, eye colour mutant, X chromosome.

scholarly journals Histocompatible Colour Mutant from CBA/Lab Strain of Mice

Nature ◽  
1961 ◽  
Vol 189 (4769) ◽  
pp. 1031-1031 ◽  
Author(s):  
ANNIE M. BROWN ◽  
MARGARET J. COOK
Keyword(s):  
Colour Mutant

scholarly journals Characterisation of white and yellow eye colour mutant strains of house cricket, Acheta domesticus

PLoS ONE ◽  
2019 ◽  
Vol 14 (5) ◽  
pp. e0216281
Author(s):  
Jacek Francikowski ◽  
Michał Krzyżowski ◽  
Barbara Kochańska ◽  
Marta Potrzebska ◽  
Bartosz Baran ◽  
...  
Keyword(s):  
Acheta Domesticus ◽  
House Cricket ◽  
Colour Mutant ◽  
Eye Colour ◽  
Mutant Strains

scholarly journals Frontenac Gris as colour-mutant Frontenac grape variety

2021 ◽  
pp. 30-35
Author(s):  
S. I. Krasokhina ◽  
N. V. Matveeva
Keyword(s):  
Agricultural Research ◽  
Clonal Selection ◽  
Economic Value ◽  
Research Centre ◽  
University Of Minnesota ◽  
Grape Variety ◽  
Early Maturity ◽  
Colour Mutant ◽  
Russian Research Institute ◽  
Trial Field

The work aimed to assess the cultivation and breeding prospects of the new Frontenac Gris technical grape variety obtained in 2003 by clonal selection as a colour-mutant Frontenac red technical grape originated by the University of Minnesota, USA. The variety is a complex cross-species hybrid with early maturity in the zone of Novocherkassk, Rostov Region. The variety was studied in 2018-2020 following the common viticulture and winemaking protocols at an experimental plot of the Novocherkassk trial field of All-Russian Research Institute of Viticulture and Winemaking named after Ya.I. Potapenko — Branch of the Federal Rostov Agricultural Research Centre. Vineyards were uncovered, unirrigated, grafted, Berlandieri×Riparia Kober 5BB rootstock, 3×1.5 m planting scheme. Formation as medium-standard double-shouldered horizontal cordon. By combination of economic value and agrobiological traits (cold and winter hardiness, yield, anti-phytopathogen resistance, high wine material quality), the Frontenac Gris variety holds promise in industrial viticulture. It can be recommended for gardening in sufficiently humid cool climates avoiding winter bush sheltering, as well as for breeding. The variety is low-hardy to drought and summer heat, which hinders its growing in the southern country. The variety’s disadvantages are in early maturity and slight berries wilting on bush in dry and windy air, which can pose an issue in juice production from pressed berries.

scholarly journals A buff spore colour mutant in Sordaria brevicollis showing high-frequency conversion: 2. Loss of the high-frequency conversion

1983 ◽  
Vol 41 (2) ◽  
pp. 155-163 ◽  
Author(s):  
Mary V. Macdonald ◽  
Harold L. K. Whitehouse
Keyword(s):  
Nucleotide Sequence ◽  
High Frequency ◽  
Frequency Conversion ◽  
Recessive Gene ◽  
Initiation Site ◽  
Dominant Allele ◽  
Single Recessive Gene ◽  
Wild Type ◽  
Colour Mutant ◽  
Conversion Frequency

SUMMARYA mutant, YS17, at the buff spore colour locus in Sordaria brevicollis has previously been described. It shows conversion with high frequency, predominantly to wild type, and is believed to act as a recognition site for an endonuclease that initiates recombination at the YS17 site. The discovery is now reported of a gene that causes loss of the high-frequency conversion shown by the YS17 mutant. The gene was present in existing stocks of the fungus. It reduces the conversion frequency of YS17 to a level similar to that of other buff mutants, from which it is inferred that the YS17 mutant no longer acts as an initiation site for recombination. When the conversion frequency of YS17 is low the bias in conversion to wild type rather than to mutant is lost, suggesting that this bias may relate to the initiation of recombination at the site. The loss of high frequency conversion of YS17 appears to be determined by a single recessive gene linked to mating type and unlinked to buff. It is suggested that the dominant allele induces recombination at the site of YS17 by controlling either the synthesis or the activity of an endonuclease that is capable of recognising the nucleotide sequence at the YS17 site. Some anomalous results point to the existence of modifiers of the action of the gene.

Sign in / Sign up

Export Citation Format

Share Document