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利用ＬＣＡ－３便携式光合议对不同染色体背景的材料测定表明，就旗叶水分利用效率 （ ＵＥ）而言，不同染色体组的大小排序为ＡＡ＞ＳＢ＞ＤＤ＞ＲＲ，说明Ａ组染色体上载有控 制高ＷＵＥ的基因。对中国春双端体系列的研究表明，Ａ组染色体无论在缺失长臂和短臂时， 其端体也保持较高的旗叶ＷＵＥ，在１ＡＬ、２ＡＬ、２ＡＳ、７ＡＳ染色体臂上载有控制高ＷＵＥ的基 因。对小黑麦附加系的研究表明，４Ｒ染色体上载有控制高ＷＬＪＥ的基因，而５Ｒ染色体上有抑 制高ＷＵＥ的基因。最后讨论了小麦种、属第４部分同源群染色体抗逆性基因定位的研究进 展，并强调应重视对小麦种、属第４部分同源群染色体的研究和利用。
The LCA-3 portable photosynthesis analysis of different chromosomal backgrounds indicated that the order of the size of the different chromosomes was AA> SB> DD> RR for leaf water use efficiency (UE), indicating that the control group High WUE gene. Studies on the Chinese spring duanbian series showed that the A group of chromosomes maintained high flag leaf WUE in the absence of long arms and short arms, and contained high control in the 1AL, 2AL, 2AS, 7AS chromosomal arms WUE gene. Studies on triticale addi- tional lines have shown that the 4R chromosome contains genes that control high WLJE, while the 5R chromosome has genes that suppress high WUE. Finally, the research progress of the wheat seedling, which belongs to the locus of the resistance gene of the fourth part of homologous groups, is emphasized, and the emphasis should be placed on the research and utilization of wheat chromosomes, which belongs to the fourth part of homologous groups.