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水稻耐低磷种质的筛选与鉴定
引用本文:刘亚,李自超,米国华,张洪亮,穆平,王象坤.水稻耐低磷种质的筛选与鉴定[J].作物学报,2005,31(2):238-242.
作者姓名:刘亚  李自超  米国华  张洪亮  穆平  王象坤
作者单位:中国农业大学农业部作物基因组学与遗传改良重点实验室, 北京市作物遗传改良实验室, 北京 100094
基金项目:国家重点基础研究发展计划(973计划),国家科技攻关项目
摘    要:本研究对281份不同的水稻(Oryza sativa L.)品种(品系)进行了耐低磷筛选和鉴定。在大田种植条件下,通过水稻部分性状耐低磷系数(-P/+P)的变异范围、平均值以及它们间的相关性分析,认为相对籽粒产量、相对成熟期的地上部生物重、相对植株分蘖期的分蘖数是较好的耐低磷筛选和评价的指标。并提出以偏低含磷量大田初筛及

关 键 词:水稻,种质资源,耐低磷,筛选
收稿时间:2003-11-28
修稿时间:2003年11月28

Screening and Identification for Tolerance to Low-phosphorus Stress of Rice Germplasm (Oryza sativa L.)
LIU Ya,LI Zi-Chao,MI Guo-hua,ZHANG Hong-Liang,MU Ping,WANG Xiang-Kun.Screening and Identification for Tolerance to Low-phosphorus Stress of Rice Germplasm (Oryza sativa L.)[J].Acta Agronomica Sinica,2005,31(2):238-242.
Authors:LIU Ya  LI Zi-Chao  MI Guo-hua  ZHANG Hong-Liang  MU Ping  WANG Xiang-Kun
Affiliation:Key Laboratory of Crop Genomics and Genetic Improvement, Ministry of Agriculture; Key Laboratory of Crop Genetic Improvement in Beijing, China Agricultural University, Beijing 100094
Abstract:rice cultivars (lines) were screened and identified for tolerance to low-phosphorus. The average, variation range and coefficient of variation (CV) for coefficient of tolerance to low-phosphorus in yield, biomass, plant height, tiller number, seed-setting ratio, 1 000-grain weight and panicle per plant were evaluated. Based on those values and their correlation analysis, relative tiller numbers during tiller stage, relative biomass (yield) and relative grain yield at mature stage were used as indexes for screening and identifying rice genotypes for tolerance to low-phosphorus. The screening method with two steps was proposed, in which the first step was in rice field with slight lower phosphorus content and the second step was in pot culture with well-controlled lower phosphorus content. Among the materials tested Nonglin12, IRAT 109, Hanjiu, IR20, Diansanxing7888-3A/02428, 02428/Qinai and 02428/Xingshi were identified as the typical genotypes with tolerance to low-phosphorus, and Yuefu, N22, AWS170, CPS/Qinai and 02428/Nebennet as the typical sensitive ones to low-phosphorus. The results also indicated the materials from different regions or different ecotypes in the world had various ability of tolerance to low- phosphorus stress. More of IRAT and ITA serial cultivars from Africa and upland rice cultivars are tolerant to low-phosphorus. Materials sensitive to low-phosphorus stress showed lower tillering ability, dwarf plant, delayed tasseling development and low yield compared to those tolerant to low-phosphorus under phosphorus deficiency.
Keywords:Oryza sativa L    Germplasm  Tolerance to low-phosphorus  Screening
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