SRAP分子标记分析广西糯玉米地方品种的遗传多样性

Genetic diversity analysis of glutinous maize landraces by using SRAP molecular markers

【目的】研究广西糯玉米地方品种的遗传多样性,初步划分类群,为其改良和创新利用提供参考。【方法】利用SRAP分子标记技术对广西49个糯玉米地方品种进行遗传多样性分析及杂种优势群划分。【结果】49份糯玉米地方品种被划分为5个类群,广西特别是广西西部和北部糯玉米地方品种具有丰富的遗传多样性;百色和河池地区大部分地方品种被划分在同一类群,这些糯玉米地方品种具有较强的区域性,即同一地区大部分糯玉米地方品种亲缘关系较近,且相邻的百色和河池地区的大部分糯玉米地方品种亲缘关系也较近。【结论】广西糯玉米地方品种具有较丰富的遗传多样性,且这些地方品种的遗传类群与地理来源和地理环境有较大关系。

【Objective】In this research， the genetic diversity of Guangxi glutinous maize landraces was studied and the preliminary taxa classification was conducted in order to provide reference for the improvement and innovation of glutinous maize germplasm. 【Method】Utilizing the SRAP molecular markers technology， the genetic diversity and heterosis group divisions of 49 glutinous maize landraces in Guangxi were analyzed. 【Result】The 49 glutinous maize landraces were divided into 5 groups， in which Guangxi， Western and Northern Guangxi areas in particular， had an abundant genetic diversity of glutinous maize landraces. Varieties in most parts of Baise and Hechi region were divided into the same group since these glutinous maize landraces had strong regional characteristics， that is， these glutinous maize landraces from the same area were closely related genetically. Also， the glutinous maize landraces in the neighboring Baise and Hechi areas exhibited strong phylogenetic relationship. 【Conclusion】The Guangxi glutinous maize landraces displayed rich genetic diversity， and the geographic origin and geographical environment had significant relationship on these genetically related landraces.