陆地棉种子萌发期对低温胁迫的响应及耐冷性鉴定

张陇艳,程功敏,魏恒玲,王寒涛,芦建华,马峙英,喻树迅

Chilling Tolerance Identification and Response to Cold Stress of Gossypium hirsutum Varieties (Lines) During Germination Stage

ZHANG LongYan,CHENG GongMin,WEI HengLing,WANG HanTao,LU JianHua,MA ZhiYing,YU ShuXun

表1 不同棉花材料萌发期各耐冷指标的差异

Table 1 Differences in chilling-tolerance indices of different cottons at germination stage

指标 Indices 极小值 Minimum 极大值 Maximum 均值 Average 标准差 Standard deviation 偏度 Skewness 峰度 Kurtosis 变异系数 Coefficient variation 吸胀速率IR(%) 0.070 0.619 0.279 0.147 0.480 -0.859 0.527 相对吸胀速率RIR 0.244 1.003 0.588 0.147 0.044 0.246 0.250 芽鲜重RFW (g) 0.310 4.060 2.061 0.791 -0.005 0.555 0.384 胚鲜重EFW (g) 13.110 24.173 16.308 2.121 1.526 3.721 0.130 芽干重RDW (g) 0.094 0.646 0.367 0.108 -0.167 0.950 0.294 胚干重EDW (g) 5.890 11.927 7.904 1.117 1.548 3.766 0.141 物质增长率MGR 0.007 0.239 0.109 0.058 0.218 -0.823 0.533 物质效率PE 0.038 0.345 0.185 0.063 0.021 0.491 0.339 平均发芽速度AGS 5.102 10.552 7.465 1.413 0.495 -0.580 0.189 发芽指数GI 2.342 19.985 13.201 4.014 -0.834 0.430 0.304 活力指数VI 0.860 78.310 29.845 16.441 0.542 1.176 0.551 平均发芽时间MGT (d) 4.989 10.180 7.169 1.277 0.486 -0.380 0.178 发芽势GP(%) 0.003 0.823 0.146 0.181 1.951 3.851 1.235 发芽率GR(%) 0.033 0.997 0.585 0.308 -0.337 -1.267 0.525 萌发指数SGC 0.068 1.721 0.851 0.430 -0.044 -0.843 0.505