Analysis of the superior yield and wide adaptability of high oil yield hybrid zhongyouza 11

摘要

Using a three-line system of Polima cytoplasmic male sterility, a hybrid variety Zhongyouza 11 with both high grain yield and oil content was developed. In the national regional variety trials through out the reaches of Yangzi River Valley, which is the main and largest winter rapeseed production area in China, the yield of Zhongyouza 11 reached 2405.7 kg/hm2, 2697.3 kg/hm2 and 2770.2 kg/hm2 in the upper, middle and lower reaches, over yielding the respective control varieties by 11.52%, 12.9% and 14.92% in 2003-2005. The oil yield of Zhongyouza 11 in the national regional trials was 1083.3 kg/hm2, 1210.2 kg/hm2, 1224.8kg/hm2, over yielding the controls by 29.42%, 27.65% and 20.98%, respectively, in the upper, middle and lower reaches of Yangzi River Valley. The highest oil yield reached 1369.65 kg/hm2(in the Middle reach of Yangzi River Valley, 2003-2004),increased by 46.21% compared to the control. At almost all the regional trials, the average yield of Zhongyouza 11 ranked the first among all lines participated. Among 29 experimental locations, the yield of Zhongyouza 11 surpassed the controls at 28 of them in the national regional trials, indicating wide adaptability of this variety. Zhongyouza 11 has become the only one that passed the national regional trials of all three regions along the Yangzi River Valley at the same time by 2005. The erucic acid content of Zhongyouza 11 was 0.26% and glucosinolate content was 18.79 μmol/g in commercial seeds, which reached the canola quality standard of Canadian criterion.