Genetic Analysis on the Male Sterile Gene of Lanzhou Genic Male-Sterile Wheat

We studied the genetic characters of the male-sterile gene in Lanzhou Genetic Male-Sterile Wheat(LGMS) by cytological method, genetic analysis and nullisomic analysis. Pollen abortion processes of the mutant male sterile line 257A were comparatively investigated with cytological method. It was concluded that there were no distinct structural differences between male sterile line 257A and its corresponding male-fertile line 257B during the stage of anther development, pollen abortion occurres after the period of dikaryophase, and the disintegration process in the taptum intercellular layer tissue of sterile anthers was retarded. Genetic analysis indicated that the the male sterility in this mutant was controlled by a pair of recessive genes and genetic stability of the male sterility wasn't influenced by different wheat cytoplasm and environmental factors like photoperiod and temperature. Nullisomic analysis showed that the male sterile genes located in the chromosome 4B of wheat.