Carotenoids of the triple recessive, yellow-tangerine-apricot.<p>

Jenkins, U. A. and G. Mackinney.<p>
     
Subsequent to our report, Carotenoids of the Apricot tomato and its hybrids
with yellow and tangerine (Genetics 40(5):715-720), we have obtained the
triple recessive yellowtangerine-apricot by crossing yellow-tangerine x
tangerine-apricot.<p>
     
The F2 progeny showed a wide range of tangerine shades with no clearcut
discontinuities.  Therefore, each F2 plant vas hybridized with both parents so
that the folowing year an F3 and two test crosses could be grown from each F2
plant.  Among 21 successfully tested F2 plants two triple recessives (rr tt
atat) were obtained.<p>
     
Tangerine-apricot (tt atat), yellow-tangerine (rr tt) and
yellow-tangerine-apricot (rr tt atat are reduced tangerines with prolycopene
as the dominant pigment -- tangerine-apricot has the most pigment and
yellow-tangerine-apricot the least.  It is significant that the bottom
recessive (rr tt atat) has a greater total content of pigment, than apricot
(r^+^r^+ t^+^t^+ atat), yellow (rr t^+^t^+ at^+^at^+) and yellow-apricot (rr
t^+^t^+ atat).  The latter three have decreasing amounts of total carotenoids
in that order but with beta-carotene as the dominant pigment.<p>

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