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试验以强抗寒性品种‘延油2号’为母本,丰产性品种‘天油2号’为父本进行杂交,后代群体置于-28℃~-25℃大田条件下自然越冬选择,育成了高产、抗寒、早熟的强抗寒性白菜型冬油菜品种‘陇油9号’.该品种平均株高111.7cm,有效分枝数为10.0个,主花序长度42.3cm,主花序结角数43.0个,全株结角数112.7个,角粒数21.2粒,角果长度6.0cm,千粒质量3.3g,单株产量11.3g,生育期286d,含油率43.37%,产量143.21kg/667m2,较对照‘天油2号’增产2.47%~13.56%.‘陇油9号’可抗-27.0℃极端低温,在新疆乌鲁木齐、北京、青海和甘肃兰州以北及河西走廊的张掖、武威能够安全越冬,越冬率80%~90%;熟期早,在北方地区常年于5月底至6月初成熟,适宜作马铃薯、油葵、大豆、蔬菜等作物的前茬.该品种的推广将有效解决我国北方旱寒区冬油菜越冬问题及早熟性与抗寒性的矛盾.
The test was conducted in the field with strong cold resistance variety ’Yangyou 2’ as the female parent and the high yielding cultivar ’Tianyou 2’ as the male parent. The offspring population was naturally overwintered under the field conditions of -28 ℃ ~ -25 ℃. Bred winter wheat variety “Longyou 9” with high yield, cold resistance and precocious vigor, the average plant height was 111.7cm, the number of effective branches was 10.0, the length of main inflorescence was 42.3cm, the main inflorescence knot The number of horns was 43.0, the number of horns was 112.7, the number of horns was 21.2, the length of fruit was 6.0cm, the weight of 1000 grains was 3.3g, the yield per plant was 11.3g, the growth period was 286d, the oil content was 43.37% and the yield was 143.21kg / 667m2, which increased 2.47% ~ 13.56% compared with the control ’Tianyou 2.’ Longyou 9 was resistant to -27.0 ℃ extremely low temperature in Urumqi, Beijing, Qinghai and Gansu Province, north of Lanzhou and Hexi Corridor of Zhangye and Wuwei It can be used for winter, overwintering rate of 80% ~ 90%; Early maturity, the perennial mature in the northern region from the end of May to early June, suitable for potato, sunflower, soybeans, vegetables and other crops before the crop. The promotion of the species will be effective Solve the problem of winter overwintering winter rape and the contradiction of precocity and cold resistance in drought area of northern China.