| 糜子不同性状对光周期的响应及综合评价 |
| 点此下载全文 |
| 引用本文：杨军学，罗世武，程炳文，张尚沛，张晓娟，李 凯，王 湛，王 勇.糜子不同性状对光周期的响应及综合评价[J].西北农业学报,2023,(5):685~696 |
| DOI:10.7606/j.issn.1004-1389.2023.05.004 |
| 摘要点击次数: 309 |
| 全文下载次数: 245 |
|
| 基金项目:宁夏回族自治区重点研发计划（2018BBF02005）；宁夏回族自治区农业科技自主创新资金（NGSB-2021-6）；宁夏回族自治区重大研发项目（2021BBF02021）；国家现代农业产业技术体系（CARS-06-13.5-A18）；固原市科技研发类计划项目（2021GYKYF028）；宁夏小杂粮创新团队（2020CXTD0062）。 |
|
| 中文摘要:为探讨不同品种糜子各性状指标对光周期的反应，通过遮阴棚处理，设置6、9、12 h光照和自然光照（对照）4个光周期环境，调查15份糜子材料的生育期、农艺性状、产量和短日抽穗促进率的光反应特性，以11个性状指标的相对敏感度值分析各性状指标的光周期敏感度，并采用2种综合评价方法对15个糜子品种的光周期敏感性进行综合评价。结果表明，糜子在三叶期进入光敏感期，12 h光照处理为糜子短日处理标准。与自然日照相比，短日处理缩短了糜子抽穗期，株高、分蘖数、穗长、主穗小穗数、千粒质量、主茎节数和产量随着日照时数的缩短整体上呈递减趋势，日照时数低于6 h或高于12 h均会减少糜子叶片数、缩短糜子穗颈长度，降低糜子有效穗数，短日出穗促进率相对较低的品种表现为更强的适应性。11个性状指标的光周期相对敏感度值在-0.7~1.6之间，株高和主穗小穗数的光周期相对敏感度最强，其次是有效穗数、生育期、主穗长，叶片数和千粒质量的敏感度较弱，结合主成分分析结果显示，株高和主穗小穗数可作为主要评价指标，主穗长和生育期可作为参考评价指标，千粒质量和叶片数不适合做为评价光周期敏感性指标，光周期综合指标评价D值显示‘赤糜2号’和‘固糜21号’为光周期低敏感型糜子品种。 |
| 中文关键词:糜子 光周期 农艺性状 光周期敏感度 |
| |
| Photoperiod Responses of Different Traits in Broomcorn Millet and Its Comprehensive Assessment |
|
|
| Abstract:In order to explore photoperiod responses of different traits of broomcorn millet, 15 broomcorn millet varieties were studied in terms of light responses of their growth stages, agronomic traits, yields and short-day enhanced heading while they were placed at 6,9,12 sunshine hours and a natural sunshine(control) by sun shading; then, 11 traits or indicators were selected and their relative photoperiod response sensitivities were assessed and accordingly two comprehensive assessment methods were employed to holistically assess photoperiod sensitivities of these 15 varieties.The results showed that broomcorn millet was sensitive to light when it grew with three leaves, and its standard sunshine hours was 12 hours of sunshine.In broomcorn millet, short sunshine hours shortened heading duration,plant heights, tiller numbers per plant, spike lengths, spikelet number per main-stem spike, 1 000-kernel mass and node numbers per main stem compared with a natural sunshine, and the yield generally tended to be declining with the decrease of the sunshine hours.The leaf number per plant, the neck lengths of spikes and numbers of fruiting spikes per plant reduced at a sunshine of less than 6 hours or more than 12 hours, the varieties with a lower short-day enhanced heading rate had a stronger adaptability.There were 11 traits or indicators which the photoperiod sensitivity values ranged within -0.7-1.6, the plant heights and spikelet numbers were most sensitive to photoperiod, followed by the numbers of fruiting spikes per plant, growth stages, lengths of main-stem spikes, leaf number per plant and 1 000 kernel mass of low photoperiod sensitivities.Considering their PCA results, the plant mass and spikelet numbers per main-stem spike could be taken as major assessment indicators and length of main-stem spikes and growth stages could be taken as reference assessment indicators, however, 1 000 kernel mass and leaf number per plant were not appropriate indicators to be used in photoperiod sensitivity assessment.In addition, the D values obtained in the comprehensive photoperiod sensitivity assessment showed that Chimi 2 and Gumi 21 were ones with lower photoperiod sensitivities. |
| keywords:Broomcorn millet Photoperiod Agronomic traits Photoperiod sensitivities |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
