| Analysis of adaptability of winter rapeseed (Brassica napus L.) in cold and drought areas of Northwest China |
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| DOI：10.7606/j.issn.1000-7601.2016.06.10 |
| Key Words: Brassica napus L. hardiness agronomic traits oil content variation analysis |
| Author Name | Affiliation | | HOU Xian-fei | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SUN Wan-cang | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FANG Yan | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
Key Laboratory of Arid Land Crop Science in Gansu Province/Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WU Jun-yan | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
Key Laboratory of Arid Land Crop Science in Gansu Province/Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Zi-gang | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
Key Laboratory of Arid Land Crop Science in Gansu Province/Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Lin-bo | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | QIAN Wu | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | MA Li | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHEN Qi | Gansu Rapeseed Engineering Research Center, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| To study the suitability of Brassica napus L. in cold and dry regions of northwest China, in this study, 29 lines of Brassica napus L. were compared on their winter-survival, growth period, yield components, oil content and agronomic traits in Tianshui and Lanzhou. The results showed that wintering rates of all tested lines in Tianshui site were higher than those in Lanzhou. In Tianshui, over-wintering rates of 21 tested lines were higher than 80.0% in. However, in Lanzhou, the average over-wintering rate with mulching was 14.49% and the highest was 48.5% for Pinggan 1. The combined variance showed that pilot climate difference was the main reason causing the difference in over-wintering rate. Compared with those in Tianshui, northward-expanded (Lanzhou) rapeseed plants exhibited great changes in the progression of growth, as reflected mainly by the significantly prolonged over-wintering period, shortened growth period in post-winter and prolonged whole growth period. In Tianshui, plant height, branch height, length of main florescence, 1000-seed weight, yield per 667 m2 and averaged oil content were 133.52 cm, 32.79 cm, 51.37 cm, 3.15 g, 184.20 kg and 40.16%, higher than those of 22.11 cm, 31.58 cm, 2.47 cm, 0.66 g, 160.54 kg and 22.54% in Lanzhou. The variation analysis showed that in Tianshui, the over-wintering rate, the main agronomic traits, yield and oil content variation coefficient were relatively stable, less than those in Lanzhou. In conclusion, it is indicated that Tianshui has the characteristics of outstanding over-wintering rate, good agronomic characters, high yield, high oil content, and wide adaptation. |
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