Combining ability analysis of some yellow maize (Zea maysl.) inbred lines [electronic resource].

Includes reference.

Twenty six yellow maize inbred lines derived from different hetrotic group through selection in the disease nursery field at Mallawy Agricultural Research Station were used In this study. In 2008 growing season the twenty six inbred lines were topcrossed to each of two narrow base inbred testers i.e. Gm.1002 and Gm.1021 at Mallawy Agric. Res. Stn. In 2009 season, 52 topcrosses along with two commercial check hybrids i.e. SC 162 and SC 166 were evaluated in replicated yield trials conducted at Sakha and Mallawy. Data were recorded for days to 50% silking, plant and ear height (em), ears per 100 plants, ear length (em), no. of rows per ear, no. of kernels per row and adjusted grain yield at 15.5% grain moisture and converted to ardab per fed. Combined analysis over the two locations showed that mean squares due to crosses and lines were significant or highly significant for all the studied traits except of lines for number of kernels/row. Mean squares due to lines x testers were significant for days to 50% silking, number of rows/ear and grain yield, indicating their differences in order of performance in crosses with each of the testers. Mean squares due to crosses x locations interactions were significant for grain yield. Mean squares due to lines x locations were significant for number of rows/ear.

Summary in Arabic.

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