Relationship among Turnip and Tsukena (Brassica rapa L.) Cultivars Originated in Nagano Prefecture

Abstract

The cultivars of turnip and tsukena (Brassica rapa L.) originated Nagano Prefecture were examined for morphology and affinity with their closely related cultivars. Thirteen cultivars in Nagano Pref. were allocated to 5 of 7 groups classified by cluster analysis on the basis of 43 morphological characters. The distribution of the cultivars on scatter diagram by the principal component analysis almost agreed with the classification by cluster analysis. Thirteen cultivars in Nagano Pref. were classified as follows.
Group 1: ‘Gensukekabuna’, ‘Nozawana’, ‘Suwabenikabu’, ‘Kisona’, ‘Inekokina’, ‘Yoshinokabu’ and ‘Habirona’
Group 2: ‘Kaidakabu’, ‘Hosojimakabu’ and ‘Ohtakikabu’
Group 3: ‘Hodairakabu’
Group 4: ‘Akane’
Group 5: ‘Yukina’
The cultivars included in group 1 and group 2 were differentiated after transmission in Nagano Pref. In contrast, the cultivars included group 3, group 4 and group 5 were differentiated in other regions.