| 卢文佳，李武，胡建广，李高科.甜玉米新优品种耐热性鉴定及耐热品种筛选[J].广东农业科学,2021,48(3):19-25 |
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甜玉米新优品种耐热性鉴定及耐热品种筛选 |
| Heat Resistance Identification and Variety Screening of New-superior Sweet Corn Varieties |
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| DOI：10.16768/j.issn.1004-874X.2021.03.003 |
| 中文关键词: 甜玉米 耐热性鉴定 品种筛选 产量 农艺性状 |
| 英文关键词: sweet corn heat resistance identification variety screening yield agronrmic traits |
| 基金项目:广东省重点领域研发计划项目（2018B020202008）；国家重点研发计划项目（2018YFD0100106）；广东省级乡村振兴战略专项（粤财农〔2020〕100 号）；广东省农业科学院科技创新战略专项资金（高水平农科院建设）-“十三五”学科团队建设项目（201610TD） |
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| 中文摘要: |
| 【目的】开展甜玉米品种耐热性鉴定试验，筛选适宜华南地区夏季播种的优质耐热型甜玉米品种。【方法】以粤甜 38 号等 8 个甜玉米新品种为试验材料（粤甜 39 号为对照种）在广州进行夏季种植，利用单因素分析、相关性分析法对不同甜玉米品种进行耐热性综合评价，筛选出耐热性好的甜玉米品种。【结果】与甜玉米产量高度相关的农艺性状为穗粗、总粒数、结实率和穗位高。利用耐热性材料培育的粤甜 40 号和粤甜 59 号综合表现较好，鲜穗产量分别达 16 840.3、15 264.4 kg/hm2，分别比对照种粤甜 39 号增产 19.1% 和 8.0%，净穗产量分别达 13 179.3、11 700.9 kg/hm2，分别比对照种增产 37.4%、22.0%，适宜在华南地区夏季种植。【结论】粤甜 40 号和粤甜 59 号的综合农艺性状均优于对照种粤甜 39 号，表现出较好的耐热性，适宜广东地区夏季大面积推广示范。 |
| 英文摘要: |
| 【Objective】The heat resistance identification test of sweet corn varieties was carried out in order to screen out high quality heat-resistant sweet corn varieties suitable for summer sowing in south China. 【Method】The experiment took Yuetian 39 as the control variety, and eight new sweet corn varieties including Yuetian 38 as the experimental materials. The summer growth period was all under the condition of high temperature and humidity. Comprehensive evaluation on heat resistance of different varieties was conducted through single factor analysis and correlation analysis, and the sweet corn varieties with good heat resistance were screened out.【Result】The agronomic traits highly correlated with the yield of sweet corn were ear diameter, total grains number, seed setting rate and ear height. Among them, the high quality new varieties Yuetian 40 and Yuetian 59 cultivated by heat resistant materials had better comprehensive performance, and the fresh spike yields reached 16 840.3 kg/hm2 and 15 264.4 kg/hm2, respectively, which were 19.1% and 8.0% higher than the control Yuetian 39, and the net spike yield reached 13 179.3 kg/hm2 and 11 700.9 kg/hm2, respectively, which were 37.4% and 22.0% higher than the control, suitable for summer planting in south China.【Conclusion】Among the 8 sweet corn varieties, Yuetian 40 and Yuetian 59 had better comprehensive agronomic traits than the control variety Yuetian 39, showing better heat resistance, suitable for summer planting in Guangdong and suitable for large-scale promotion and demonstration. |
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