不同棉花品种种子活力对低温和人工老化胁迫的反应 - 中国棉花杂志社.PDFVIP

棉 花 学 报 Cotton Science 20 16, 28(2): 144―151 同棉花品种种子活力对低温和人工老化胁迫的反应差异 闫强 曾雅青 王乐然 孟亚利* ( 南京农业大学/ 农业部作物生理生态与生产管理重点实验室, 江苏南京2 10095) 摘要院为探讨棉花种子活力的品种差异及不同种子活力测定方法对棉子活力结果的影响 以17 个棉花主栽品 种( 系) 为材料 用简化的标准发芽尧低温发芽和人工老化发芽3 种方法测定棉花种子活力 并分析种子物理性 状与种子活力的相关性遥 结果表明院3 种活力测定方法下不同品种间种子活力均存在较大差异 各活力指标表 现趋势也不一致 低温条件主要抑制种子幼 的生长势 老化条件则主要抑制种子的发芽率遥 简化的标准发芽 的活力指数与2 种逆境发芽下的活力指数间的相关性较低遥 对3 种测定方法的种子活力指标进行聚类分析 筛选出中棉所102 尧新陆中42 尧湘杂7 号尧XG39K5尧屯杂6 号及皖杂9 号等高活力品种遥 低温和人工老化发芽 条件显著降低了种子活力与种子各物理性状间的相关性遥 种子密度和健子率在不同发芽条件下均与种子活力 关系最密切 可作为判断棉花种子活力大小的物理指标遥 关键词院棉花曰种子活力曰低温发芽曰人工老化发芽曰活力指数曰物理性状 中图分类号院S562.01 文献标志码院A 文章编号院1002-7807(2016)02-0144-08 10.11963/issn.1002-7807.20 1602007 Yan Qiang, Zeng Yaqing, Wang Leran, Meng Yali* ( 2 10095, ) To investigate cultivar differences in cotton seed vigor and the effects of different vigor determination methods on cot- ton seed vigor, we selected 17 cotton cultivars in which to measure seed vigor characteristics. We used simplified standard, low-temperature, and artificial aging germination test conditions, and analyzed the correlation between seed vigor and physical characteristics. Results showed many differences in seed vigor in the different cultivars, and that seed vigor characteristics were not consistent under the three germination test conditions. Seedling growth rate was mainly inhibited under low-temperature conditions, and seed germination percentage was mainly inhibited under artificial aging conditions. The correlation of the vigor index between simplified standard and stress germination was lower. High vigor cultivars CCRI 102, Xinluzhong 42, Xiangza 7, XG39K5, Tunza 6, and Wanza 9 were selected by cluster analysis of the three germination tests. In addition, the correlation be- tween seed vigor and physi