水稻选择导入系耐低氮改良与QTL定位研究

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氮素是水稻生长发育所必需的营养物质之一,也是需求最大的矿质营养元素之一。在水稻生长过程中,单位面积用氮量高和利用率低已成为水稻发展的两大难题。研究水稻氮代谢的机制,提高氮肥吸收、利用效率是保证我国水稻安全可持续生产的一种经济、环保和长效的策略。本论文以我国生产上大面积推广应用的籼稻恢复系蜀恢527和明恢86为轮回亲本,2004和TKM9为供体亲本,构建了蜀恢527/2004、明恢86/2004、蜀恢527/TKM9及明恢86/TKM9等4个BC2F4耐低氮选择导入系群体。在正常施氮(对照)与低氮胁迫
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