浙江省糯玉米品种稳定性、适应性和试点综合评价

Comprehensive evaluation on the stability, adaptability and location for waxy maize varieties in Zhejiang Province

为明确品种、地点、年份因子对浙江省糯玉米产量性状和构成产量相关性状的贡献率,本研究利用基于混合线性模型的统计分析方法,对2013—2015年浙江省糯玉米区试数据进行分析,从试点的生产水平、精度、分辨力、代表性和稳定性等5方面对浙江省糯玉米8个区试点进行初步的综合评价研究,同时对29个糯玉米参试品种进行丰产性、稳定性和适应性评价。结果表明:8个试点的精确度较高,试验均有效;8个试点的生产水平有高有低,代表着不同的地点生产水平;嘉善、杭州、淳安等3个试点对糯玉米产量性状的分辨力较高;东阳、江山、淳安、杭州等4个试点对糯玉米产量性状具有较高的普遍代表性,宜鉴别广泛适应性的品种;东阳、嘉善2个试点的适宜性较好,稳定性较高;品种、地点、品种与地点互作效应、年份与地点互作效应对糯玉米产量性状有显著影响,品种和地点互作效应对糯玉米产量构成的农艺性状没有显著影响。品种产量性状稳定性和丰产性分析结果表明,糯玉米品种"科甜糯2号"的产量和稳定性都较好。

Waxy maize is an important economic crop in Zhejiang Province.Agronomic traits,especially the yield and yieldrelated traits of waxy maize are the focus of attention paid by both waxy maize breeders and producers.Most agronomic traits of waxy maize are quantitative traits affected by environment,variety-by-location interaction,variety and location-by-year interaction.It is very important to understand the contribution rates of each factor to agronomic traits of waxy maize,so as to screen appropriate varieties for Zhejiang Province.In this study,a regional variety test with random complete block design was implemented in multiple locations from2013to2015.Totally,29waxy maize varieties and eight test locations were arranged with three blocks in each location.The yield and seven yield-related traits,ear length,ear diameter,net ear rate,rows per ear,row grains,fresh1000-grain mass,and seed producing rate were investigated.Based on the location effects,variety effects,year effects,location-by-year interaction effects,variety-by-location interaction effects,predicted by a mixed linear model,the stability and adaptability of the29varieties were analyzed,and the eight locations were comprehensively evaluated using productive level,precision,distinguishing ability,representation and stability.SAS and QTModel softwares were applied for the analysis.