| Evaluationand analysis of yield, quality and lodging resistance of Brassica napus in the drought and cold areas of Northern China |
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| DOI：10.7606/j.issn.1000-7601.2023.04.03 |
| Key Words: winter rape (Brassica napus L.) yield quality lodging resistance comprehensive evaluation drought and cold areas of Northern China |
| Author Name | Affiliation | | LI Hui | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WEI Jiaping | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | DONG Xiaoyun | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHENG Guoqiang | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CUI Junmei | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FANG Yan | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WU Zefeng | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CAO Xiaodong | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FANG Xinling | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Ying | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | TIAN Haiyan | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Jinxiong | Institute of Agricultural Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850000, China | | LIU Zigang | State Key Laboratory of Aridland Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| From 2018 to 2019, 34 winter rape lines with strong cold resistance were used as experimental materials to analyze and evaluate their yield, quality and lodging resistance and find excellent germplasm resources. The results showed that the yield, quality and lodging resistance of 34 winter rape materials were quite different. Among them, the yield per plant ranges was 6.50~36.67 g, the average yield was 21.08 g and the yield of 17NPZ240-1 is the highest. Correlation analysis showed that the siliques number of the whole plant (r=0.897**) and the number of seeds per pod (r=0.534**) were significantly positively correlated with yield per plant. The lodging coefficient was 153.74~359.61, and 17NDL20-7 had the lowest lodging coefficient and the strongest lodging resistance. Correlation analysis showed that breaking\|resistant strength (r=-0.501**), height of center of gravity (r=502**), stem diameter (r=-0.816**), branch position (r=0.472**) and main inflorescence length (r=-0.679**) were significantly correlated with lodging coefficient. Oil content was 33.40%~49.54%, the average content was 43.32%, and the material with the highest content was 17DNL32-3. The content of protein was 16.87%~27.24%, with an average content of 21.18% and the material with the highest content was 16NTS309-4. The oleic acid content was 23.62%~68.81%, with an average content of 45.92% and the material with the highest content was 17NPZ242-1. The content of linoleic acid was 10.62%~18.48%, with an average content of 14.87%, the material with the highest content was 17NPZ52-3. The content of linolenic acid was 5.41%~8.97%, with an average content of 7.60%, the material with the highest content was 17NPZ52-3. The erucic acid content was 0.15%~27.51%, with an average content of 10.80%, the material with the lowest content was 17PZ52-3. The content of glucosinolate was 18.47~70.35 μmol·g-1, with an average content of 34.41 μmol·g-1 and the material with the highest content was 16NTS309-7. Correlation analysis showed that the contents of oleic acid, linoleic acid, linolenic acid and erucic acid were significantly correlated (0.421≤r≤0.913). The average membership function values F of the nine indexes was 0.25~0.77, with a difference of 0.52, and there was a big difference among the lines. Cluster analysis divided 34 winter rape materials into 3 groups, and the first group contained 17 materials, which had the best comprehensive performance but the lowest average oil content. The second group contained 4 materials with weak comprehensive performance and the highest average lodging coefficient. The average values of other 8 indexes were in the middle level. The third group contained 13 materials with the weakest comprehensive performance but the highest average oil content. The average lodging coefficient at the middle level, and the average of the other seven indexes were at the lowest level. |
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