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小麦显性雄性不育基因Ｍｓ２与显性矮秆基因Ｒｈｔ１０在４Ｄ染色体上是紧密连锁的，交换率仅为０．１８％。不育基因Ｍｓ２距着丝点３１．５６个交换单位，而矮秆基因Ｒｈｔ１０距离着丝点３１．７４个交换单位。
The dominant male sterility gene Ms2 and dominant dwarfing gene Rht10 were closely linked on chromosome 4D with a rate of exchange of only 0.18%. The sterile gene Ms2 was 31.56 exchange units from the centromere, while the dwarf gene Rht10 was 31.74 exchange units from the centromere.