What are the high-quality germplasm resources of ordinary Chinese cabbage?

High-quality common Chinese cabbage germplasm resources not only have good commodity, but also have high nutrition and few disgusting components.

After identification and screening, Nanjing Agricultural University has 16 inbred lines of high quality common Chinese cabbage, such as Aihuang, Suzhou Green, Aibai Stem, Nannong Aihuang and tetraploid Suzhou Green.

Shao et al. (2006) showed that the nitrate content of different varieties of Chinese cabbage in the same season and the same variety of Chinese cabbage planted in different seasons was obviously different (Table 5-2).

Comparison of nitrate content of different Chinese cabbage varieties in different cultivation seasons

Note: The "grade" in the table is the grading evaluation standard of nitrate content in edible parts of vegetables proposed by Shen Mingzhu and others according to the ADI value stipulated by the World Health Organization and the Food and Agriculture Organization of the United Nations, namely, 1 grade ≤432mg/kg, grade 2 ≤785mg/kg, grade 3 ≤ 1 440mg/kg and grade 4 ≤ 3 65438.

Wang Liping (2002) comparatively screened the nitrate content of 46 Chinese cabbage varieties in four different seasons: spring, summer, autumn and winter. The results showed that the difference of nitrate content among Chinese cabbage varieties was extremely significant, and the highest and lowest difference could reach 2000 ~ 4000 mg/kg (fresh weight). The winter experiment showed that Jiangsu Aihuang, Hongqiao Ailv, Black Oil Cabbage and Xiangtan Aibai had higher nitrate content, while Shanghai Green, Reyou No.2, Nannai Cabbage, Hongmingqing Cabbage and Spoon Cabbage had lower nitrate content. The results of spring test further confirmed that there were significant differences in nitrate content among Chinese cabbage varieties. The nitrate content of Jiangsu Aihuang, Xiangtan Aibai, Hongqiao Ailv and Black Cabbage is still high, while the nitrate content of Shanghai Ailv, Ailv Cabbage, Reyou No.2, Aikangqing and Hongmingqing is low. The results of summer experiments showed that Jiangsu Aihuang, Xiangtan Aibai, Aihei Leaf, Black Cabbage, Japanese Cabbage and Hongqiao Aicai were higher in content, especially Jiangsu Aihuang, while Shanghai Christina, Ainai Cabbage, Aikanglv, Reyou No.2 and Shanghai Xia Dongqing were lower in content. The results of autumn experiment also showed that the nitrate content of different varieties of Chinese cabbage was significantly different, among which Xiangtan Aibai, Jiangsu Aihuang, Baisha 1 cabbage and Hongqiao Ailv were higher, while Shanghai Green, Ailv Cabbage, Hongmingqing and Reyou No.2 were lower.

According to the above results, the common Chinese cabbage germplasm resources with low nitrate content are: Shanghai Qing, Reyou No.2, Dwarf Cabbage (low content in spring, summer, autumn and winter), Hongmingqing (low content in winter, spring and autumn), Aikangqing, Shanghai Xia Dongqing (low content in spring and summer) and Spoon Cabbage (low content in winter).