Post by terracotta on Feb 13, 2012 11:36:34 GMT -5
I am basing my breeding reccomendations on the cross between Cucumis sativus L., 2n = 14 and C. hystrix Chakr. 2n = 24. here is an article on it
ddr.nal.usda.gov/dspace/bitstream/10113/14363/1/IND23272766.pdf
"A single recessive gene su (Chambliss et al., 1968) eliminates bitterness in fruit of C. lanatus, and is allelic to the dominant gene (Su) for bitter flavor in the fruit of the colocynth (Citrullus colocynthis)"
"suppressor of bitterness; (su named by Robinson*); non-bitter fruit; su from 'Hawkesbury'; Su from bitter-fruited mutant of 'Hawkesbury'; bitterness in C. colocynthis is due to Su Su genotype."
"Watermelon flesh color is controlled by several genes to produce scarlet red, coral red, orange, salmon yellow, canary yellow, or white. Genes conditioning flesh colors are B (Shimotsuma, 1963), C (Poole, 1944), i-C (Henderson et al., 1998), Wf (Shimotsuma, 1963), y (Porter, 1937) and y-o (Henderson, 1989; Henderson et al., 1998). Canary yellow (C) is dominant to other colored flesh (c). Coral red flesh (Y) is dominant to salmon yellow (y). Orange flesh (y-o) is a member of multiple allelic system at that locus, where Y (coral red flesh) is dominant to both y-o (orange flesh) and y (salmon yellow), and y-o (orange flesh) is dominant to y (salmon yellow). In a separate study, two loci with epistatic interaction controlled white, yellow, and red flesh. Yellow flesh (B) is dominant to red flesh. The gene Wf is epistatic to B, so genotypes WfWf BB or WfWf bb were white fleshed, wfwf BB was yellow fleshed, and wfwf bb was red fleshed. Canary yellow flesh is dominant to coral red, and i-C inhibitory to C, resulting in red flesh. In the absence of i-C, C is epistatic to Y."
cuke.hort.ncsu.edu/cgc/cgcgenes/wmgenes/gene07wmelon.html
as you can see it is not that easy to determine if the fruit is good by pulp coloration alone. brix test may be the best way to go also b. alba's poison is readily detected by smell since it is a strong astringent odor.
ddr.nal.usda.gov/dspace/bitstream/10113/14363/1/IND23272766.pdf
"A single recessive gene su (Chambliss et al., 1968) eliminates bitterness in fruit of C. lanatus, and is allelic to the dominant gene (Su) for bitter flavor in the fruit of the colocynth (Citrullus colocynthis)"
"suppressor of bitterness; (su named by Robinson*); non-bitter fruit; su from 'Hawkesbury'; Su from bitter-fruited mutant of 'Hawkesbury'; bitterness in C. colocynthis is due to Su Su genotype."
"Watermelon flesh color is controlled by several genes to produce scarlet red, coral red, orange, salmon yellow, canary yellow, or white. Genes conditioning flesh colors are B (Shimotsuma, 1963), C (Poole, 1944), i-C (Henderson et al., 1998), Wf (Shimotsuma, 1963), y (Porter, 1937) and y-o (Henderson, 1989; Henderson et al., 1998). Canary yellow (C) is dominant to other colored flesh (c). Coral red flesh (Y) is dominant to salmon yellow (y). Orange flesh (y-o) is a member of multiple allelic system at that locus, where Y (coral red flesh) is dominant to both y-o (orange flesh) and y (salmon yellow), and y-o (orange flesh) is dominant to y (salmon yellow). In a separate study, two loci with epistatic interaction controlled white, yellow, and red flesh. Yellow flesh (B) is dominant to red flesh. The gene Wf is epistatic to B, so genotypes WfWf BB or WfWf bb were white fleshed, wfwf BB was yellow fleshed, and wfwf bb was red fleshed. Canary yellow flesh is dominant to coral red, and i-C inhibitory to C, resulting in red flesh. In the absence of i-C, C is epistatic to Y."
cuke.hort.ncsu.edu/cgc/cgcgenes/wmgenes/gene07wmelon.html
as you can see it is not that easy to determine if the fruit is good by pulp coloration alone. brix test may be the best way to go also b. alba's poison is readily detected by smell since it is a strong astringent odor.
