|浙江大学学报(农业与生命科学版) 2017, 43(3) 281-288 DOI: 10.3785/j.issn.1008-9209.2016.11.211 ISSN: 1008-9209 CN: 33-1247/S|
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|（1.浙江省种子管理总站，杭州 310020；2.浙江大学农业与生物技术学院作物科学研究所，杭州 310058）|
|关键词： 糯玉米 农艺性状 区域试验 试点评价 品种评价 混合线性模型|
|Comprehensive evaluation on the stability, adaptability and location for waxy maize varieties in Zhejiang Province|
|LI Yan1, LIN Feng2, LI Lulu2, XU Haiming2*|
|(1. Seed Management Station of Zhejiang Province, Hangzhou 310020, China; 2. Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China)|
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 from 2013 to 2015. Totally, 29 waxy 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, fresh 1 000-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 the 29 varieties 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.
The results of variance analysis showed that the location effects, variety effects, year effects, year-by-location interaction effects and variety-by-location interaction effects were significant for yield trait, and the variety-by-location interaction effects for seven yield-related traits were not significant. Wherein, 67.6% of variance for rows per ear was from variety effects, 36.3% of variance for yield from location effects. Additionally, the location related effects explained 6.9% 62.0% of the total variance for each agronomic trait. In accordance with the contribution rate of location?related effects, the traits from high to low contributions were the yield, seed producing rate, row grains, fresh 1 000-grain mass, net ear rate, ear diameter, ear length, rows per ear, respectively. The results for comprehensive evaluation on location showed that productive levels in the eight locations were diverse; the trial precisions in the eight locations were high, showing that the trials were all valid. In these test locations, Jiashan, Hangzhou and Chun’an possessed high distinguishability; Dongyang, Jiangshan, Chun’an and Hangzhou possessed high representativeness; Dongyang and Jiashan possessed high stability and productive level.
On evaluation of variety stability and yield-ability, according to the results of multiple comparisons by Tukey method for yield trait, the varieties marked by “a” were regarded as appropriate ones, and among them, those with yield mean value equal to or larger than the average of all appropriate ones were determined as the most appropriate varieties. Based on the variety effects and variety-by-location interaction effects, the stability of the variety was estimated. As a result, “Ketiannuo 2” was the most appropriate variety for Zhejiang Province.
|Keywords: waxy maize agronomic trait regional trial location evaluation variety evaluation mixed linear model|
|收稿日期 2016-11-21 修回日期 网络版发布日期 2016-12-08|
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