Correlation, path coefficient and regression analysis to determinine the relative contributions of some agronomic trils with grain yield in ten maize (Zea mays, L) genotypes [electronic resource].

Includes references.

This investigation was carried out at Mazora(West Elfashen) Agriculture Res.sL,Beni-Swef Governorate during 2002 and 2003 growing seasons the airne of this investigation estimate the relative contributions of some agronomic traits ten maize single crosses; SC10, 120, 122, 123, 124, 129, Watania 4, Bashaier, SC155 and SC161. These hxbrids were evaluated under five planting dates Le. March 10th , March 30th, April 201 ,May 10th and May 30th in two seasons. Randomized complete blocks design with four replications was used. The studied traits in both seasons were grain yield (ard/fad), days to 50% tasseling. days to 50% silking, plant height. ear height. number of plants per plot at harvest. ear length and ear diameter. Correlation, path coefficient and stepwise multiple regression analysis were calculated for yield and its attributes in each planting date in the two seasons Results for grain yield showed significant positive correlation coefficient with plant height, ear height. ears number at harvest and ear length. Furthermore stepwise multiple regression and path coefficient with respect path analysis results in indicated that ears number and ear length were contributed by 21.77% and 9.38% respectively in the first season and by 14.11% and 7.84% respectively in the second season as an overages plating date in direct effects. analysis showed that ears number at harvest and ear length had the highest direct and indirect influences on yield. which contributed by 19.16% and 7.34% respectively in the first season and by 34.62% and 9.10% respectively In the second season as an average of planting dates. It could concluded that ear number and ear length are the important characters contribution to grain yield.

Summary in Arabic.

1