【摘 要】
：
[目的]分析不同温度型小麦胚乳细胞增殖、籽粒体积和干质量的增长动态以及胚乳细胞数与籽粒干质量和体积的相关性,以期进行为不同温度型小麦的利用和优良品种的选育提供理论
【机 构】
：
西北农林科技大学生命科学学院,河南科技大学,西北农林科技大学理学院
【出 处】
：
西北农林科技大学学报（自然科学版）
论文部分内容阅读
[目的]分析不同温度型小麦胚乳细胞增殖、籽粒体积和干质量的增长动态以及胚乳细胞数与籽粒干质量和体积的相关性,以期进行为不同温度型小麦的利用和优良品种的选育提供理论依据.[方法]采用胚乳细胞染色、分离、显微镜下计数等方法,研究冷型小麦小偃6号、陕229、RB6和暖型小麦9430、NR9405、偃师9号的胚乳细胞增殖动态、籽粒体积和干质量的增长特性,以及胚乳细胞数与籽粒体积和干质量的相关性.[结果]小麦胚乳细胞增殖过程分为渐增期、快增期和缓增期3个阶段.在胚乳细胞快增期,冷型小麦增长比暖型小麦快,在缓增期,冷型小麦各品种胚乳细胞数较暖型小麦多;冷型小麦籽粒体积和干质量在胚乳细胞数缓增期较暖型小麦大;小麦籽粒胚乳细胞数与籽粒干质量和体积均呈极显著正相关,胚乳细胞数与籽粒干质量的决定系数R2为0.814,与籽粒体积的决定系数R2为0.900.[结论]冷型小麦各品种籽粒最终的胚乳细胞数较暖型小麦多,籽粒体积和干质量在胚乳细胞数缓增期较暖型小麦大;胚乳细胞数与籽粒干质量和体积均呈极显著正相关.
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