A two-year study was conducted on Sorghum (Sorghum bicolor L.Moench) across two environments in North Kordofan State, Sudan, to examine eight grain sorghum genotypes (Qusari, Wad-mergani, Sefera Red-Zinnari, Fraikh, Hamadi, Nilla and Kelash). The Quasari and Kelash genotypes are early flowering and early maturing. The genotype Quasari ,Fraikh and Nilla were superior in yield and yield's performance across all environmental conditions. Positive and significant phenotypic and genotypic correlations were found. Grain yield per hectare had high significant positive correlation with number of grain per panicle and number of panicles per unit area. The variance components for the two environments showed that most of the characters had higher phenotypic and genotypic variance estimates than the environmental variance estimates.

Set of sixteen guar genotypes was evaluated under rain-fed conditions at Kazgeil, Northren Kordofan State, Sudan in 1998/99 season, using a four x four triple partially balanced lattice design. Data recorded at were used for partitioning the genotypic correlations between seed yield and five of its components into direct and indirect effects. Moreover, different selection indices were constructed using different combinations of these characters. The path analysis showed that number of pods/plant had the highest positive direct effect (2.653) on seed yield/plant followed by number of seeds per pod. On the other hand number of fruiting nodes/main stem exerted the highest negative direct effect (-1.383) on seed yield/plant. The selection index involving single trait viz.1000 seed weight gave the minimum expected genetic advance (0.6) and relative efficiency (83.33%). However, the index involving all the six traits exhibited the highest expected genetic advance (2.03) and the maximum relative efficiency (281.94%).The two trait selection index of number of pods/plant and 1000-seed weight scored the relative efficiency of 138.89% which is equal to the relative efficiency of the individual trait index of number of reproductive branches/plant.