[Selection of full-sib families of Malang composite corn having high grain yield and early maturity characteristics]
1990
Sholihin | Dahlan, M. | Slamet, S. (Balai Penelitian Tanaman Pangan Malang (Indonesia))
The objective of this study was to identify full-sib families of Malang composite which have high grain yield and early maturity for developing a new population/variety. The field experiment was conducted at the Muneng Experimental Station, Probolinggo, East Java, in the 1989 dry season. A total of 250 families and 6 variety checks were evaluated in a 16 x 16 simple lattice with two replications. The result indicated that the genetic variability was present in the families. The heritability was 0.825, 0.589, 0.582, 0.487, 0.835, 0.837, 0.378, and 0.25, respectively for grain yield, grain moisture, plant height, ear height, days to silking, days to mature, rate of leaf blight, and rust. If 25 families (10 percent selection intensity) based on the grain yield, the expected selection gain is 33.8 percent and this selection will reduce the leaf blight and rust intensity, but it will increase grain moisture, plant height ear height, days to silking and days to mature. If selection is on single character for early maturity i.e. days to silking, days to mature and grain moisture, the new population will have mature early, but with reduced grain yield. Decreasing grain yields for the single character selection for days to silking, days to mature and low grain moisture were 4.11, 15.47 and 5.96 percent, respectively. In similar response, selection for the short plant will also reduce grain yield. On the other hand, selection for rust resistance will increase grain yield.
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