Comparison of Karyotype between Wild R. rugosa Thunb. and Cultivars R. rugosa cv.′Plena′

[Objective] The aim was to compare and study the karyotype between wild R.rugosa Thunb.and cultivars R.rugosa cv.′Plena′.[Method] The morphological characteristics,distribution,phenology of R.rugosa Thunb.in Hunchun of Jilin Province,and its fruits nutritional compositions and variation types were described.In addition,the karyotype between wild R.rugosa Thunb.and cultivars R.rugosa cv.′Plena′ was compared.[Result] The results showed that the wild R.rugosa Thunb.was 2n = 14 and the cultivars R.rugosa cv.′Plena′ was hybrid body formed by the diploid and polyploid.[Conclusion] The study provides a reference for plant breeder doing the relative study.