宁麦18是采用改良集团法育成的高产、稳产、多抗、弱筋小麦新品种。利用2008～2011年江苏省淮南组和国家长江中下游冬麦组区域试验以及生产试验资料，对宁麦18的丰产性、稳产性以及产量构成因素进行分析。结果表明：宁麦18在参试品种中平均产量均为第1位，江苏省区试和生产试验分别比对照增产9．8％和4．6％，国家区试和生产试验分别比对照增产7．8％和7．2％。宁麦18适应度较高，变异系数、回归系数和Shukla变异系数均较低，具有广泛的适应性和较好的稳产性。宁麦18平均穗数486．7万／hm2、穗粒数41．4粒、千粒重35．7 g，产量三因素协调性较好。穗数、穗粒数与产量分别呈极显著和显著正相关。穗数对产量的直接作用最大，其次是穗粒数，千粒重的作用较小。因此，在宁麦18的高产栽培中，应在保证足够穗数的基础上，增加穗粒数和稳定提高千粒重。%Ningmai 18, which is bred by using the modified bulk selection method, is a new weak-gluten wheat variety with high yield, stable yield, and multi-resistance.The yield potential, yield stability and yield components of Ningmai 18 were ana-lyzed according to the data of regional trials and pilot trials during 2008~2011.The results revealed that the average yield of Ning-mai 18 ranked the first of all tested varieties in both Jiangsu provincial and national yield trials.The yield of Ningmai 18 was sepa-rately 9.8%and 4.6%higher than that of the check variety Yangmai 11 in the regional trial and pilot trial of Jiangsu province, and it was respectively 7.8%and 7.2%higher than that of the check variety Yangmai 158 in the national regional trial and pilot trial. Ningmai 18 possessed higher fitness, broad adaptability and better yield stability, and the variation coefficients, regressive coeffi-cients and Shukla variation coefficients of its yield were all lower.The average number of spikes per unit area, number of grains per spike, and 1000-grain weight of Ningmai 18 were 4867000 spike/hm2 , 41.4 grain/spike, and 35.7 g, respectively.Its grain yield was very significantly or significantly positively correlated with the number of spikes per unit area or the number of grains per spike, respectively.The number of spikes per unit area had the greatest positive direct effect on grain yield, followed by the number of grains per spike, and 1000-grain weight had little effect.Therefore, the key to obtain high yield of Ningmai 18 is to increase the number of grains per spike and improve the stability of 1000-grain weight on the basis of the sufficient number of spikes per unit ar-ea.
展开▼
