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中国油料作物学报 ›› 2017, Vol. 39 ›› Issue (5): 634-.doi: 10.7505/j.issn.1007-9084.2017.05.007

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Correlation of oil body, protein body, oil content and protein content of Brassica rapa L. in Tibet

  

  1. Plateau Crop Molecular Breeding Laboratory, Xizang Agiricultural and Animal Husbandry Collegge, Linzhi 860000, China
  • Online:2017-10-28 Published:2018-01-09

Abstract:

 To explore the correlation between the oil/protein body shapes and oil/protein contents of seeds from Tibet Brassica rapa L., 36 cultivars and landraces were investigated on oil body and protein body, as well as oil and protein contents. Materials were classified by oil content into high (50.22-54.94%), medium (45.41-49.91%) and low (20.76-38.45%) groups. Sizes of oil body and protein body were observed by Leica DM5000. Results showed that the oil bodies were mainly round, and protein bodies were subrotund. Seeds from high oil content group (HO) had more oil bodies with larger sizes (average of 2.12 μm), and less protein bodies with larger sizes (average of 5.24 μm). Seeds from low oil content group (LO) had less oil bodies with smaller sizes (average of 1.44 μm), and more protein bodies with smaller sizes (average of 3.81 μm). The correlation analysis showed that: 1. oil body size had significant positive correlation with oil content, but had significant negative correlation with protein content; 2. Protein body size had no correlation with protein content; 3. Seed oil content had significant negative correlation with protein content. Thus for high oil breeding in Tibetan regions, the candidate materials should have greater number and large size of oil body, and have fewer protein body with larger size.

Key words: Brassica rapa L., oil body, oil content, protein body