人工合成小麦幼苗耐低温特性鉴定

Evaluation of low-temperature tolerant Germplasm Resource on Seedling Traits of Synthetic Hexaploid Wheats

人工合成小麦(synthetic hexaploid wheat)遗传变异丰富,具有丰富的抗性基因,是现代小麦改良的优异基因资源。为了鉴定人工合成小麦品种的耐低温特性,筛选耐低温种质资源。利用59个栽培二粒小麦(Triticum dicoccum,AABB)/节节麦(Aegilops tauschii,DD)和硬粒小麦(Triticum durum,AABB)/节节值(麦各人性工状合低成温小与麦室,温在下室测温(定1值8℃的)比和值低)温和(隶4属℃)函处数理法下相测结定合萌的发方1法5天,综的合幼评苗价形人态工指合标成,采小用麦性品状种相的对抗低温特性。结果表明,栽培二粒小麦/节节麦人工合成小麦的耐低温特性总体较硬粒小麦/节节麦人工合成小麦强;筛选出一批耐低温特性强的栽培二粒小麦/节节麦人工合成小麦材料,可用于小麦耐低温育种。

Synthetic hexaploid wheat from crossing tetraploid wheat （AABB） with Triticum tauschii （DD） possesses rich genetic diversities and elite genes for common wheat improvement. In order to evaluate the low-temperature tolerance of wheat varieties and to screen wheat germplasm resource of low-temperature tolerance. Fifty nine synthetic hexaploid wheats were used to investigate the morphologic traits of seedling （15d） at room temperature （18℃ ） and low temperature （4℃ ）, relative trait values （the ratios of trait values at low temperature to those at room temperature） and subordinate function values. The results showed that thelow-temperature tolerance in synthetics of Triticum dicoccum/Aegilops tauschii wheats was higher than that of Triticum duruml Aegilops tauschii. The germplasm with low-temperature tolerance could be used for wheatbreeding.