| 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. |
| 关键词: 冷型小麦 胚乳细胞 籽粒干质量 籽粒体积 相关性分析 |
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| 基金项目:国家自然科学基金项目（30470333）；西北农林科技大学科研项目（07ZR033） |
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| Endosperm cell proliferating and grain growth dynamics and their correlation in different temperature wheat types |
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| Abstract: |
| 【Objective】 The research studied the dynamics of endosperm cell proliferating,grain volume and dry weight increase and correlations between endosperm cell and grain volume and between endosperm cell and grain dry weight to provide a basis for the utilization of wheat types and variety breeding.【Method】 The dynamics of endosperm cell proliferating,grain volume and dry weight increase and their correlations between cold type wheat Xiaoyan6,Shaan229,RB6 and warm type wheat 9430,NR9405,Yanshi9 were investigated by dyeing,separating and counting of endosperm cells.【Result】 Endosperm cell proliferating process had 3 stages:slow increase stage,rapid increase stage and steady stage.During rapid increase stage,endosperm cell proliferating of cold wheats was faster than that of warm wheats.During steady stage,endosperm cell number,grain volume and dry weight of cold wheats were higher than those of warm wheats.Extremely significantly positive correlations were statistically indicated between endosperm cell number and grain dry weight,endosperm cell number and grain volume,R2 was 0.814 and 0.9 respectively.【Conclusion】 Ultimate endosperm cell number,grain volume and dry weight in endosperm cell steady stage were larger than those of warm wheats.Extremely significantly positive correlations were certified between endosperm cell number and grain volume,endosperm cell number and grain dry weight. |
| Key words: cold wheat types endosperm cell grain dry weight grain volume correlation analysis |
