STUDY ON BREED CROSS BETWEEN THE THIN-SKINNED MUSKMELON (SSP. CONMON) AND THE THICK-SKINNED MUSKMELON (SSP. MELO): EXPRESSION OF F1 HYBID AND ANALYSIS OF COMBINING ABILITY FOR THE PARENTS

The objective of this study was to determine the hetrotic effect on the yield, growing period duration, thicknessof caro and content of solule solid, and to select the hopeful hybridized combiantion.

Three separate flower (SF) genotypes (L₁, L₂, L₃, thin-skinned) with four thick-skinned muskmelon genotypes (T₁, T₂, T₃, T₄) were crossed i dialled combination to obtain 12 crossed. Data were collected on parents and F₁ in the field during 1992, in Experimetn Station, He Xin, Chang Chun. Among all cross combinations, F₁ heterosis is over the mid-parent for the yield and growing period duration (over 41.56% and - 15.73%, respectively), but the thickness of caro and content of soluble solid are superior to parents nonsignificantly. Analysis of combining ability showed that general combining ability (GCA) of the parent L₁ is the highest for content of soluble solid. Special combining ability (SCA) is the highest in cross of L₁ x T₂. Both of them are identical with experimental results. This study suggested that combination L₁ x T₂ is a hopeful.

Fruit of F₁ bybrid between thin-skinned muskmelon (ssp.conomon) and thick-skinned muskmelon (ssp. melo), intermediate type, has special flavour of Hami melon, caro plentiful juice, and is suitable for store and transport, and also is able to bear damp and hot, disease-resistant. At present it is the direction of breed cross of muskmelon (CuCumismelo. L) at home and abroad.

In this research thin-skinned (female parent) and thick-skinned muskmelon (male parent) were crossed to determine exprision of F₁ hybrid and parents, combining ability, and to provide basis for a successful breeding program of muskmelon in ideal, intermediate type.

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