甘蔗低氮胁迫性状变化与蔗茎含氮量的研究  

Response to Low Nitrogen Stress and Stalk Nitrogen Content of Sugarcane Germplasm

作　　者：杨荣仲[1,2] 周会[1,2] 桂意云[1,2] 梁强[1,2] 贤武[1,2] 雷敬超[1,2] 李杨瑞[1,2] 

机构地区：[1]中国农业科学院甘蔗研究中心,农业部广西甘蔗生物技术与遗传改良重点实验室,广西南宁530007 [2]广西农业科学院甘蔗研究所,广西甘蔗遗传改良重点实验室,广西南宁530007

出　　处：《安徽农业科学》2013年第2期481-484,共4页Journal of Anhui Agricultural Sciences

基　　金：甘蔗产业技术体系(CARS-20-1-3);广西农业科学院基本科研业务费项目(G2009004)

摘　　要：[目的]为了解甘蔗低氮胁迫响应的性状变化特点,确定低氮胁迫评价关键性状。[方法]以来自12个国家和地区的28份甘蔗种质为材料,开展低氮胁迫盆栽试验。[结果]甘蔗低氮胁迫响应随性状、种质不同而异。根据低氮胁迫指数,可将性状低氮胁迫响应分为低氮胁迫上升、低氮胁迫变化不明显、低氮胁迫下降不一致和低氮胁迫一致下降4类。种质聚类分类表明,评价低氮胁迫最重要的性状是蔗产量低氮胁迫指数。蔗茎含氮量分析结果表明,不同种质的含氮量存在较大差异,且与蔗产量低氮胁迫指数、低氮胁迫的蔗产量和有效茎存在显著或极显著负相关。[结论]蔗产量低氮胁迫指数是评价低氮胁迫最重要的性状。蔗茎含氮量越低,甘蔗种的低氮适应潜力越好。[Objective] In order to understand the sugarcane traits response to low nitrogen stress and its variation among germplasm and make sure the key traits of evaluation for low nitrogen stress.[Method] A pot trail with low nitrogen stress was conducted by 28 accessions of sugarcane germplasm from 12 countries and areas.[Result] The response of sugarcane to low nitrogen stress was varying with the traits and germplasm.The sugarcane response of triats to low nitrogen stress could be divided into four types including low nitrogen stress increased,low nitrogen stress did not change significantly,low nitrogen stress decreased inconsistently and low nitrogen stress decreased consistently based on low nitrogen stress index.The clustering analysis of sugarcane germplasm suggested that low nitrogen stress index of cane yield was the first important.Sugarcane stalk nitrogen content was different among the germplasm and there was significant negative correlation between stalk nitrogen content and low nitrogen stress index of cane yield,cane yield and millable stalks under low nitrogen stress.[Conlcusion] The cane yield index of low nitrogen stress is very important for the evaluation of low nitrogen stress.And the nitrogen content of stalk is the lower and the potential to adapt to low nitrogen stress is better for sugarcane germplasm.

关 键 词：甘蔗 低氮胁迫 蔗茎含氮量 

分 类 号：S566.1[农业科学—作物学]