In order to evaluate the genetic relationships between glutinous sorghum germplasms, 25 pair of SSR markers were used to analyze the genetic diversity of29 varieties. The result showed that a total of 59 alleles were identified with an average of 2.28 alleles per locus. The average effective number of alleles（NE） was1.81.The average polymorphism information content（PIC） varied widely from 0.17 to0.62 with an average value of 0.34.The similarity coefficients of the 29 glutinous sorghum germplasms ranged from 0.203 to 0.949 with an average value of 0.593.Clustering analysis with UPGMA showed that the varieties could be divided into two groups at the genetic similarity coefficient of 0.475.The varieties from different geographic originswere clustered into one subclass, and the varieties with similar agronomic traits were clustered into one subclass, which indicated that the genetic relationships among materials was not in accordance with their geographical origins,and the glutinous sorghum germplasm resources showed abundant genetic diversity in the study.
Using 3 sterile lines and 12 restorer of glutinous sorghum as experimental materials,36 hybrid combinations（3×12 NCⅡ） were designed to analyze the combining ability and heritability of six main agronomic traits,including plant height,panicle length,growth period,1 000-grain weight,per panicle grains and per panicle grain weight.The results showed that except per panicle grain number all other five agronomic traits have remarkable or extremely remarkable general combining ability and specific combining ability.Six agronomic traits were found to be control by additive genetic effect.Most of these agronomic traits are more easily influenced by restorers than sterile lines,suggesting that more attention should be paid to select restores in hybrid glutinous sorghum breeding.The narrow-sense heritability of these agronomic traits were in order growth period plant height per panicle grain weight panicle length 1 000-grain weight per panicle grains.
