INHERITANCE OF PARTHENOCARPY IN CUCUMBER UNDER THE SAME BACKGROUND

Using the mixed major gene and polygene inheritance model of quantitative traits, the inheritance of parthenocarpy in cucumber (Cucumis sativus L.) was joint analyzed in four generations derived from crosses of a highly parthenocarpic mono¬ecious line ‘6457’ and a gynoecious line ‘6401’ to a non-parthenocarpic inbred line ‘6429’, respectively.
Under the same genetic background, inheritance of parthenocarpy in monoecious and gynoecious cucumber was controlled by two major genes and polygenes, with an interaction between the two major genes.
The inheritance of parthenocarpy in gynoecious cucumber was controlled by two additive-dominant- epistatic major genes and additive-dominant polygenes (E-1-1 model), and the major gene heritability of F₂ was 83.5%. While that in monoecious cucumber was controlled by two additive-dominant-epistatic major genes and additive-dominant- epistatic polygenes (E-1-0 model), and the major gene heritability of F₂ was 42.1%. Both parents were highly parthenocarpic, and the selection of parthenocarpy should be carried out in earlier generations of breeding practice.

XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on New Developments in Plant Genetics and Breeding

Li Ying Yan, Li Na Lou, Xiao Li Li, Zhi Hong Feng, Qun Feng Lou, Jin Feng Chen

cucumber, parthenocarpy, major gene and polygenes, inheritance

https://doi.org/10.17660/ActaHortic.2012.935.7