糯玉米钾素分配转移特性的基因型差异  

Genetic Differences of Potassium Distribution and Translocation in Waxy Corn

作　　者：卢艳丽[1] 陆卫平[2] 陆大雷[2] 王继丰[2] 刘小兵[2] 

机构地区：[1]广东海洋大学农学院,广东湛江524088 [2]扬州大学/江苏省作物遗传生理重点实验室,江苏扬州225009

出　　处：《玉米科学》2012年第3期56-62,共7页Journal of Maize Sciences

基　　金：国家自然科学基金项目(30270831)

摘　　要：在同一供肥水平下研究31个糯玉米品种的钾素分配转移特性,分析糯玉米钾素分配转移规律及其与钾素吸收利用的关系,揭示钾素分配转移的基因型差异及其对产量形成的作用。结果表明,糯玉米生育期间钾素在各器官的分配与氮、磷不同,钾素不随生长中心的转移而转移,在生育期间钾素主要分配在叶片和茎秆中,开花前主要分配在叶片中,开花后钾素分配到茎秆中最多。糯玉米不同品种各器官钾素转移率存在显著差异。相关分析表明,钾素转移率主要影响产量和钾素利用效率的高低,而对钾素吸收总量及钾收获指数影响较小。通径分析表明,鲜穗、鲜子粒及成熟子粒中高产品种叶片的钾素转移率较高,叶鞘的钾素转移率高有利于品种鲜穗、鲜子粒及成熟子粒钾素利用效率的提高。In order to understand the regularity of potassium（K） distribution and translocation and their effects on K absorption and utilization,explain the genotype differences of K distribution and translocation and their effects on the yield formation,31 waxy corn（Zea mays L.ceratina Kulesh） varieties released in recent years in China were planted to analyze their characteristics of K distribution and translocation in the same fertilization condition.The results showed that the K distribution centre did not change with the change of the growth centre in the process of growth of waxy corn.And the K mainly distributed in leaf and culm in the process of growth of waxy corn.The K mainly distributed in leaf before silking stage,and there are most K distributed in culm after silking stage.Moreover,there were significant differences in the K translocation rate of different organ among different varieties.Through correlation analysis,it was found that the K translocation rate had a dominant effect on yield,K utilization efficiency,but it had minor effect on total K and K harvest index.Through path analysis,it was found that the K translocation rate of the leaf was high for the varieties of high yield in fresh ear,fresh kernel and maturity kernel.In addition,it was beneficial for high K utilization efficiency as for fresh ear,fresh kernel or maturity kernel of the produce that there are high K translocation rate of leaf sheath.

关 键 词：糯玉米 钾素转移率 基因型差异 

分 类 号：S513.01[农业科学—作物学]