摘要
本研究连续2年在海南和洛阳两个不同日照长度的生态区调查了156份谷子材料的株高、叶片数、抽穗期、穗长、穗粗、穗码数、码粒数、穗粒重、千粒重9个主要农艺性状,通过9个性状的相对光周期敏感度比较分析、构建光周期敏感性综合评价指标D值对各性状进行回归分析两种方法评价9个性状的光周期敏感性,筛选能够准确反映谷子光周期敏感性的指标性状,为开展谷子光周期敏感性遗传学分析、光周期敏感性相关基因的定位奠定基础。结果表明:光周期相对敏感度排列顺序为:穗码数>抽穗期>穗长>株高>叶片数>穗粒重;各个农艺性状对光周期敏感综合指标D的回归方程为D=-8.803×10-18+0.187X_1+0.041X_2+0.146X_3+0.202X_4+0.130X_5+0.081X_6+0.098X_7-0.086X_8+0.126X_9,其中X_1、X_2、X_3、X_4、X_5、X_6、X_7、X_8、X_9分别代表抽穗期、穗粒重、株高、叶片数、穗长、穗粗、穗码数、码粒数、千粒重。9个农艺性状对光周期敏感综合指标D的直接作用最大的是穗码数(0.395),其次是穗长(0.239)、抽穗期(0.228)、穗粒重(0.176)、叶片数(0.164)、株高(0.144)。结合各个农艺性状的相对敏感度比较分析结果以及各农艺性状对综合指标D的回归分析结果,得出穗码数、穗长、抽穗期3个性状为谷子光周期极敏感指标,叶片数光周期敏感度较弱,可以作为谷子光周期敏感性评价的次要指标,株高、穗粒重在两种评价方法中排序差异较大,稳定性差,不适合作为谷子光周期敏感性评价指标。
In order to evaluate the photoperiod sensitivity of foxtail millet cultivars,here we investigated nine agronomic traits of 156 cultivars in two calendar years under two ecological areas with different photoperiod conditions. By deployment of photoperiod relative sensitivity comparsion analysis and photoperiod sensitivity comprehensive index D,we evaluated nine agronomic traits that associated with the photoperiod. The large phenotypic variations were observed（ spikelet number heading stage panicle length plant height number of leaves grain weight per panicle）. The formula to calculate the light sensitivity comprehensive index D was D =-8. 803 × 10-18＋0. 187 X1＋ 0. 041 X2＋ 0. 146 X3＋ 0. 202 X4＋ 0. 130 X5＋ 0. 081 X6＋ 0. 098 X7-0. 086 X8＋ 0. 126 X9,where X1,X2,X3,X4,X5,X6,X7,X8 and X9 represented heading stage,grain weight per panicle,plant height,number of leaves,panicle length,panicle diameter,spikelet number,grain number per spikelet and 1000-grain weight,respectively.The D values of spikelet number,panicle length,heading stage and grain weight per panicle number of leaves and plant height were 0. 395,0. 239,0. 228,0. 176,0. 164 and 0. 144,respectively. Taken together,this result suggestedthat spikelet number,panicle length and heading stage were strongly photoperiod sensitive indices,while number of leaves showed moderate photoperiod sensitivity,both of which could serve as indexs for evaluating foxtail millet photoperiod sensitivity. Due to the large variation on plant height and grain weight per panicle,both traits might be not considered to be deployed in photoperiod sensitivity evaulation in foxtail millet.
作者
贾小平
李剑峰
全建章
王永芳
董志平
张博
袁玺垒
JIA Xiao-ping;LI Jian-feng;QUAN Jian-zhang;WANG Yong-fang;DONG Zhi-ping;ZHANG Bo;YUAN Xi-leil(College of Agriculture,Henan University of Science and Technology,Luoyang 471023;Institute of Millet,Hebei Academy of Agriculture and Forestry Sciences/National Millet Improvement Center,Shi_iiazhuang 050035)
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2018年第5期919-924,共6页
Journal of Plant Genetic Resources
基金
国家自然科学基金(31471569)
关键词
谷子
光周期敏感性
抽穗期
穗码数
foxtail millet
photoperiod sensitivity
heading stage
spikelet number
