Performance of grain sorghum gonotypes

Abstract

The experiments were conducted aiming to evaluate 13 lines and 12 hybrids of grain sorghum under different environments composed by five sites and two years, in the Semi-Arid region of the State of Pernambuco. The experimental design used was in randomized complete blocks with three replications. The following characters were studied grain yield, straw production, cycle, 1000 grain weight, and lodging. The variance and stability analysis for grain yield and straw production showed that lines IPA 7300201, 7300206, 7300940, 7300980, 7300985, 7300988 and 7301011 as well as the hybrid BR 300 had acceptable level of stability for adaptation under unfavorable environments. The data for grain yield and straw production demonstrated that there was a significative correlation, indicating that a selection procedure for both characters can be made simultaneously. The lodging effect was more important in Arcoverde and São Bento do Una in 1985, where the lines were more susceptible than the hybrids. The sorghum hybrid BR 300 can be recommended due to the high grain yield, stability and tow lodging percentage. The line IPA 7301011 can still be used, specially in Serra Talhada and similar regions.