Assessment of hybrid vigour, dominance effect and hybrids regeneration potential in the genus .

hybrid vigour for hybrids resulting from crosses among six genotypes of the genus , including . . For such purpose, the mid parent heterosis and the best parent heterosis were assessed. Non parametric method related to homogeneity Chi-square at 5 % likelihood was applied to compare the regeneration potential of progenies. Student's parametric test at 5% was used to separe two means. Six parental genotypes and 16 hybrid families were evaluated for heterosis. The results showed a heterosis effect for all the characters studied nevertheless, this one varies according to the crossing. The observed hybrid vigour would be due to a superdominance or partial dominance effect. In addition, progeny from crosses have the same regenerative potential on both study sites.