关键词: 大麦, 赤霉病, 抗扩展性

Abstract: The barley resistance to spread of Fusarium head blight and its relation to agronomic characteristics were investigated using single floret injection to 103 barley varieties (lines). The results showed there were significant differences among barley genotypes for the resistance to spread of Fusarium head blight, and 103 identified barley varieties (lines) were categorized into four groups: the barley varieties (lines) high resistant to spread of Fusarium head blight (proportion of scabbed spikelet of zero to 10 %), the moderately resistant (proportion of scabbed spikelet of 10 % to 20 %), the moderately susceptible(proportion of scabbed spikelet of 20 % to 40 %) and the high susceptible (proportion of scabbed spikelet of 40 % to 100 %). The barley resistance to spread of Fusarium head blight was correlative with heading date and plant height inversely at P=0.01, and two\|row varieties (lines) resistance was stronger than that of more than two\|row ones. Fewer varieties (lines) tested were resistant, which accounted for 31.1% of the total, 10 varieties of these with high resistance were Sterling, Metcalfe，Parkhill,ACCA,ND14048,Yuhuanzhuweiba,Jiangshanerlengmai,Huangyanyedamai,Yuqingbiandamai and Shangyuhonhdamai.

Key words: barley, Fusarium head blight, spread resistance