Description of new white maize inbred lines for some agronomic performance and resistance to late wilt disease characters [electronic resource].

Includes reference.

Sixty five white inbred lines which have a good general combining effects for grain yield were evaluated in two separate experiments under two nitrogen levels, i.e., 70 and 120 kg N/fed using a randomized complete blocks design with three replications at Sakha Station during 2005 growing season in two field experiments. The first field under normal condition, observations were recorded on: silking date. plant and ear heights, ear length. number of rows/ear and grain yield. The second field. under artificial soil infestation by Cephalosporium maydis and observation was recorded on percentage of resistance to late wilt disease. Differences between the two nitrogen levels in the combined analysis were ranged from significant to highly significant for all studied characters except resistance to late wilt disease. The highest values of all studied characters were obtained by applying with 120 kg N/fed treatment except silking date. Differences between inbred lines were highly significant for all studied characters. Means of inbred lines, for silking date ranged from 60.50 for the inbred SK 6006/24 to 75.66 days for inbred SK 6046 with 13 inbred lines ranged from 60.50 to 65 days, 32 inbred lines ranged from 65 to 70 days and 20 inbred lines ranged from 70 10 75.66 days. For resistance 10 late wilt disease. 46 inbred lines exhibited highly resistance of about 95%. nine inbred lines showed resistance to late wilt disease, with percentage ranged from 90 to 95%. two inbred lines exhibited moderately resistance with percentage ranged from 85 to 90"10 and eight inbred lines were susceptible. with resistance less Ihan 85%. Meanwhile. grain yield of the inbred lines ranged from 3.5 I ardlfed lor Ihe inbred SK U 17 to 15.48 ard/fed for the inbred SK 5069. with 13 inbred lines ranged from 3.51 to 5 ardlfed, 45 inbred lines ranged from 5 to 10 ard/fed and 7 inbred lines ranged from 10 to 15.48 ardlfed.

Summary in Arabic.

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