Abstract: For screening SRAP markers associated to head smut resistance in sorghum,and to select and identify resistant sorghum in the laboratory,achieving the real molecular marker-assisted breeding,a sensitive sorghum variety Sanchisan,and a resistant variety Tx622B were selected,as research materials. Their morphological and agronomical characters were observed,and the polymorphic SRAP markers were screened. The results showed that there were significant differences in the field characters between Sanchisan and Tx622B,the plant height,stem diameter,culm height,numbers of stem nodes above ground,panical length,numbers of panicle nodes,panicle kernel weight and 1 000 kernel weight of Sanchisan were higher than Tx622B,its primary branch number was higher than Tx622B,in plot was less than Tx622B; The difference of yield traits between the two varieties reached a very significant level. And 16 pairs of polymorphic primers were identified between the two varieties,which can be further used for identifying head smut resistance-associated genes in sorghum. It provided basis for selecting and breeding resistant sorghum varieties to head smut.

Key words: Sorghum, Head smut, SRAP marker, Resistance gene

CLC Number: 

• S332.2

• Q75