Rode Eersteling: a false name for a well-known tuber colour mutant

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.

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A sex-linked, recessive, non-deleterious eye-colour mutant in Glossina morsitans centralis

Entomologia Experimentalis et Applicata ◽

10.1111/j.1570-7458.1985.tb03565.x ◽

1985 ◽

Vol 39 (2) ◽

pp. 211-212 ◽

Cited By ~ 4

Author(s):

P. Rawlings

Keyword(s):

Glossina Morsitans ◽

Colour Mutant ◽

Glossina Morsitans Centralis ◽

Eye Colour

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The genetics of black pedicel, a new colour mutant inAedes aegypti(L.)

Annals of Tropical Medicine and Parasitology ◽

10.1080/00034983.1965.11686283 ◽

1965 ◽

Vol 59 (1) ◽

pp. 55-63 ◽

Cited By ~ 4

Author(s):

W. Z. Coker

Keyword(s):

Colour Mutant

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Dihaploid induction ability of three clones of Solanum phureja (2n = 2x = 24) in interploidy cross with S. tuberosum (2n = 4x = 48)

Acta Agronomica Hungarica ◽

10.1556/aagr.58.2010.1.6 ◽

2010 ◽

Vol 58 (1) ◽

pp. 49-54

Author(s):

J. Panahandeh

Keyword(s):

Male Fertility ◽

Marker Gene ◽

Seed Parent ◽

Genetic Studies ◽

Interploidy Crosses ◽

Tuber Colour ◽

The Common ◽

Tetraploid Level ◽

Pollen Shed ◽

The Given

Potato, Solanum tuberosum L. (2n = 4x = 48), is an autotetraploid species, the breeding of which at the tetraploid level is complicated by tetrasomic inheritance. Dihaploids (2n = 2x = 24) from the tetraploid cultivated potato have great potential for breeding and genetic studies. The common method deployed to obtain potato dihaploids is to make interspecific-interploidy (4x × 2x) crosses between a tetraploid seed parent and special clones from the diploid S. phureja as pollinator. Pollinators carrying a marker gene have been used, but unfortunately, these clones were very weak, with rare flowering and low male fertility under the given conditions. To find a suitable pollinator, three clones were selected from S. phureja based on flowering, pollen shed and male fertility and were crossed with five cultivated tetraploid potatoes to evaluate their dihaploid induction ability. A total of 1529 interploidy crosses were made, resulting in 1116 berries and 1456 seeds. The progeny were divided into two groups based on stem, flower and tuber colour: hybrids and non-hybrids (putative dihaploids). Chromosome counting in non-hybrid genotypes detected 39 dihaploids. The clone phu 3 and cv. Picasso, with 12.1 and 10.7 dihaploids per 100 berries, respectively, were the best dihaploid inducer and seed parent for dihaploid production.

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

Biochemical Journal ◽

10.1042/bj0570273 ◽

1954 ◽

Vol 57 (2) ◽

pp. 273-275 ◽

Cited By ~ 31

Author(s):

S. Saperstein ◽

M. P. Starr

Keyword(s):

Colour Mutant

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Studies of the X chromosome of Anopheles albimanus

Canadian Journal of Genetics and Cytology ◽

10.1139/g85-013 ◽

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.

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