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采用14个大麦染色体标记性状材料,对大麦突变体76-2104进行了多节矮秆性状在染色体上的定位研究.研究结果表明:(1)多节矮秆性状分别由一对隐性基因控制.(2)控制多节矮秆两对性状的基因位于第四染色体上.长节间矮生(sid)与多节的交换值为12.41±2.05%.三叉芒K与多节、矮秆两对性状之间的交换值分别为47.80±4.07%和42.26±3.85%.(3)在F_2代和追踪的F_3代中,出现了正常矮秆和多节高秆两种不同于父母本的重组类型,再次确证多节和矮秆两对性状并非一因多效,而呈紧密连锁.据估算,多节与矮秆两对性状之间的交换值在不同组合表现为4.46～12.51之间.所分离出的正常节矮秆重组体在大麦育种中可作为矮源加以利用.
Fourteen barley chromosome markers were used to locate the chromosomes of the barley mutant 76-2104. The results showed that: (1) The multi-node dwarf traits were controlled by a pair of recessive genes (2) The genes controlling two pairs of traits of dwarfing were located on chromosome 4. The exchange value between sid and multi-section was 12.41 ± 2.05% The exchange values of traits were 47.80 ± 4.07% and 42.26 ± 3.85%, respectively. (3) In F2 generations and traced F_3 generations, there were two kinds of recombination Type, confirming again that the two pairs of trait and dwarf traits are not single-effect but closely linked, and the exchange value between the two pairs of traits of multi-section and dwarf is estimated to range from 4.46 to 12.51 in different combinations. The isolated normal section dwarf recombinants can be utilized as short sources in barley breeding.