Hybrid maize seed yield in correlation with distance of mother and father parent components

Experimental work conducted during 1996 and 1997 in the field trial of Agri cultural Institute in Osijek showed connection between some yield component s of single cross maize hybrids with distance between mother and father com ponents during pollination. The investigations were conducted with three di fferent hybrids in the first, second and third row of mother components dis tant from father components. Results of investigation showed that years of investigation (A) had statistically high significant influence (P < 0.01) o n the number of seed per row of ear in hybrid OSSK 247, and statistically s ignificant influence (P < 0.05) in hybrids OSSK 382 and OSSK 553. In all th ree hybrids in the second year of investigation greater number of seed per ear row than in the first year was achieved. Years of investigation (A) had statistically high significant influence (P < 0.01) on seed yield per ear in all examined hybrids. In the second year of investigation average seed y ield per ear was greater than in the first year for 1.3 to 3.0 g of seed pe r ear. Distance between mother and father components (B) had statistically high significant influence (P < 0.01) on number of seed per row in all exam ined hybrids. Number of seed in ear row was the highest in the first mother 's row, closest to father component (24.75 seeds in hybrid OSSK 247, 30.90 seeds in hybrid OSSK 382 and 30.97 seeds in hybrid OSSK 553). The lowest nu mber of seeds had mother's row that had greatest distance from father compo nent (10.14 seeds in hybrid OSSK 247, 10.65 seeds in hybrid OSSK 382 and 15 .45 seeds in hybrid OSSK 553). Distance between mother and father component (B) influenced the seed yield per ear. The greatest yield per ear had moth ers row closest to father (105.43 g of seed in hybrid OSSK 247, 107.01 g of seed in hybrid OSSK 553 and 111.31 g of seed in hybrid OSSK 382). The lowe st seed yield per ear had mothers row that had greatest distance from fathe r component (34.58 g of seed in hybrid OSSK 247, 45.07 g of seed in hybrid OSSK 382, and 57.27 g of seed in hybrid OSSK 553). Differences in seed yiel d per ear between mothers rows in all three hybrids was statistically high significant (P < 0.01).