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The Journal of Heredity 1985:76(4):305-306
© 1985 The American Genetic Association 76:305-306

other

Inheritance of light pigmentation in squash

H. S. Paris, H. Nerson, Z. Karchi, and Y. Burger

The authors are affiliated with the Department of Vegetable Crops, Agricultural Research Organization, Newe Ya'ar Experiment Station, P.O. Haifa, Israel. Contribution no. 1241-E, 1984 series, from the Agricultural Research Organization, Bet Dagan, Israel.

Abstract

The inheritance of light external fruit pigmentation of squash (Cucurbita pepo L.) was studied at two stages of growth: 2–5 days past anthesis (dpa) (young, edible summer squash stage) and 18–22 dpa (Intermediate stage of fruit development). Four cultivars and their F 1s and F2s were studied: Early Prolific Straightneck (EPS), Sihi Lavan (= White Bush) (SLA), Benning's Green Tint (BGT), and Vegetable Spaghetti (VSP), all four of which are lightly pigmented 2–5 dpa and all except the first remain lightly pigmented throughout growth. The results Indicated that the four cultivars carry the same gene (I) for light pigmentation at 2–5 dpa. Two of the four cultivars, SLA and VSP, also carry gene r that in concert with I determines light fruit pigmentation at 18–22 dpa. EPS and BGT carry R that conditions Intense fruit pigmentation at 18–22 dpa. BGT is lightly pigmented at 18–22 dpa because it carries W (white fruit color), which is epistatic to R. The genotypes of the four cultivars are EPS, // RR ww; BGT, // RR WW; and SLA and VSP, // rr ww.


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