, Volume 191, Issue 1, pp 99–107 | Cite as

Another gene affecting fruit and stem color in squash, Cucurbita pepo

  • Harry S. Paris
  • Aviva Hanan
  • Fabian Baumkoler


Of the 13 genes described as affecting fruit color in Cucurbita pepo, one, D (Dark stem), also markedly affects stem color. The D allele confers dark stems and dark intermediate-age fruits, is dominant to the d allele for light stems and fruits, and epistatic to two recessive genes conferring light fruit coloration, l-1 and l-2. However, a gene for light fruit coloration, W (Weak fruit color), is epistatic to D in the fruits. We observed variation for stem color in a scallop squash cultivar having light-colored fruits, some plants having dark stems and others light stems. Two true-breeding inbreds of this cultivar, one having dark stems and the other light stems, were developed and, when these inbreds were crossed, the progeny had light stems. In order to elucidate the genetic basis of the dominant light-stem characteristic, these two inbreds were crossed with two near-isogenic tester lines, one of genotype D/D l-1/l-1 l-2/l-2 and the other of genotype d/d l-1/l-1 l-2/l-2. Also, the dominant light stem and light fruit color were introgressed into a third near-isogenic line of genotype D/D l-1/l-1 l-2/l-2, resulting in two new near-isogenic lines, and these lines were then intercrossed. The results showed that the variation in stem color of the scallop squash cultivar derives from segregation of alleles at the W locus, with a newly designated top-dominant allele, W S , conferring both, light stems and light fruits. This allele may be genetically unstable and sub-vital.


Fruit coloration Genetic instability Multiple allelism Plant pigmentation 


  1. Ercan N, Şensoy AS (2012) Inheritance of fruit skin color in summer squash (Cucurbita pepo L.). In: Sari N, Solmaz I, Aras V (eds) Cucurbitaceae 2012 proceedings. Çukurova University, Adana (Turkey), pp 693–696Google Scholar
  2. Globerson D (1969) The inheritance of white fruit and stem color in summer squash, Cucurbita pepo L. Euphytica 18:249–255Google Scholar
  3. Loy JB (2012) Introgression of genes conferring the bush habit of growth and variation in fruit rind color into white nest egg gourd. In: Sari N, Solmaz I, Aras V (eds) Cucurbitaceae 2012 proceedings. Çukurova University, Adana (Turkey), pp 275–282Google Scholar
  4. Nilsen ET (1995) Stem photosynthesis: extent, patterns, and role in plant carbon economy. In: Gartner BL (ed) Plant stems: physiology and functional morphology. Academic Press, San Diego, pp 223–240Google Scholar
  5. Paris HS (1992) A recessive, hypostatic gene for plain light fruit coloration in Cucurbita pepo. Euphytica 60:15–20Google Scholar
  6. Paris HS (1995) The dominant Wf (White flesh) allele is necessary for expression of “white” mature fruit color in Cucurbita pepo. In: Lester GE, Dunlap JR (eds) Proceedings Cucurbitaceae ’94. Gateway Printing and Office Supply, Edinburg, pp 219–220Google Scholar
  7. Paris HS (1997) Genes for developmental fruit coloration of acorn squash. J Hered 88:52–56CrossRefGoogle Scholar
  8. Paris HS (2000a) Quiescent intense (qi): a gene that affects young but not mature fruit color intensity in Cucurbita pepo. J Hered 91:333–339PubMedCrossRefGoogle Scholar
  9. Paris HS (2000b) Gene for broad, contiguous dark stripes in cocozelle squash (Cucurbita pepo). Euphytica 115:191–196CrossRefGoogle Scholar
  10. Paris HS (2009) Genes for “reverse” fruit striping in squash (Cucurbita pepo). J Hered 100:371–379PubMedCrossRefGoogle Scholar
  11. Paris HS, Brown RN (2005) The genes of pumpkin and squash. HortScience 40:1620–1630Google Scholar
  12. Paris HS, Nerson H (1986) Genes for intense pigmentation of squash. J Hered 77:403–409Google Scholar
  13. Paris HS, Nerson H, Karchi Z, Burger Y (1985) Inheritance of light pigmentation in squash. J Hered 76:305–306Google Scholar
  14. Paris HS, Baumkoler F, Hanan A (2005–2006) Another relationship between stem and fruit color in Cucurbita pepo. Cucurbit Genet Coop Rep 28–29:75–76Google Scholar
  15. Paris HS, Lebeda A, Křistkova A, Andres TC, Nee MH (2012) Parallel evolution under domestication and phenotypic differentiation of the cultivated subspecies of Cucurbita pepo. Econ Bot 66:71–90CrossRefGoogle Scholar
  16. Scarchuk J (1954) Fruit and leaf characters in summer squash. J Hered 45:295–297Google Scholar
  17. Schöniger G (1952) Vorläufige Mitteilung über das Verhalten der Testa- und Farbgene bei verschiedenen Kreuzungen innerhalb der Kürbisart Cucurbita pepo L. Züchter 22:316–337Google Scholar
  18. Shifriss O (1955) Genetics and origin of the bicolor gourds. J Hered 46:213–222Google Scholar
  19. Sinnott EW, Durham GB (1922) Inheritance in the summer squash. J Hered 13:177–186Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Harry S. Paris
    • 1
  • Aviva Hanan
    • 1
  • Fabian Baumkoler
    • 1
  1. 1.Department of Vegetable Crops and Plant GeneticsAgricultural Research Organization, Newe Ya‘ar Research CenterRamat YishayIsrael

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