Cytogenetics and RAPD Analysis of Interspecific Hybrids from the Cross ofFragaria mandschurica Staudt and F. ananassa Duch. Studies on Reciprocal Differences in Interspecific Hybridization in Cucumis Studies on Reciprocal Differences in Interspecific Hybridization in Cucumis Cytogenetics and RAPD Analysis of Interspecific Hybrids from the Cross ofFragaria mandschurica Staudt and F. ananassa Duch. Production and Identification of Interspecific Hybrids between Cucumis hystrix Chakr.and Three Genotypes of C.sativus L.