Effects of population density on the relationship between inbred and single cross yield performance of corn

• Published in: Canadian journal of plant science Vol. 53; no. 3; pp. 533 - 536
• Main Authors: Major, D.J, Hunter, R.B, Kannenbert, L.W, Tanner, J.W
• Format: Journal Article
• Language: English
• Published: 01-01-1973
• Subjects: plant breeding; plant genetics
• ISSN: 0008-4220; 1918-1833
• DOI: 10.4141/cjps73-102

Grain yields over a wide range of plant populations were determined for 13 inbred lines of corn (Zea mays L.) in 1969 and 1970 and for 44 of the possible 78 single crosses in 1970. In addition, the grain yield of the single crosses between the 13 inbred lines was determined in 1969 and 1970 at 52,000 plants/ha. The correlation coefficients between actual single cross grain yields and computed midparent values varied according to population density, but no advantage was shown for growing inbreds at higher than conventional populations.