survey of yield and bulb quantitative and qualititative traits in iranian onion morphotypes.

for evaluation of iranian onion morphotypes potentials and application of them in breedingprogrames, seeds of 23 iranian onion morphotypeswere collected from east azarbaijan (redazarshahrmorphotypes), tehran (red rey morphotypes), razavi khorasan (red neyshaboormorphotypes) and zanjan (gholyghese morphotypes). these onion morphotypes were planted inrcbd design in four replications in seed and plant improvement institute fromearly april 2010.results showed high variation in studing traits among morphotypes.red rey2, azar gokan2, redrey4 and local neyshaboor2 morphotypes had the highest yield and marketing traits, but hadnodifference among morphotypes at tissue firmness. all morphotypes had low bulb dry matter and werenot suitable for processing. results of cluster analysis among morphotypesshowed that 23morphotypes were clustered at 3 groups. in each cluster morphological traits of morphotypes wasadjust with their collecting location.