Author: Binsika BimayalaPublisher:
ISBN:
Category :
Languages : en
Pages : 172
Book Description
Two hundred S1 lines of BS8 S1 from the BS8 population were grown in several locations during the growing season of 1975 for yield. European corn borer, H. turcicum, H. maydis P. sorghi, P. polysora, and downy mildew evaluation. The 200 lines were divided into three sets of experiments of 100, 50, and 50 entries conducted in simple lattice and randomized complete block designs, respectively. A pooled analysis for all experiments also were calculated for each trait. Data for yield were taken in a disease-free environment at the Ames Hinds Farm. Observations for the pathogens were made on plants infected artificially for some traits and on plants under natural infection for other traits. The analysis of variance for yield and pathogen were computed. The results obtained showed significant differences among progenies insome experiments and no significant differences for others for different characters. The coefficient of variation (C.V.'S) for root and stalk lodging anddropped ears were high and resulted from low means and the relatively large experimental errors. Data for root stalk lodging and dropped ears, however, were not considered for selecting the best lines for recombination to initiable the next cycle of selection. Estimates of variance components were obtained from the analysis of variance of each experimental and the pooled analysis. The correlation coefficients between yield and different pathogens were calculated by use of the estimates of components of variance, The mean squares, and the (...).
