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Modifications to Cyclic Hybridization in Maize with Single-Eared Plants¹

Two methods (M-l and M-2) for cyclic hybridization in maize (Zea mays L.) not requiring prolific plants are proposed as alternatives to the original method (M-0) of Hallauer (1967) and Lonnquist and Williams (1967). The methods involve the use of pairs of related plants for hybridization and development of the inbred lines. Under method M-l "C" lines are produced through full-sib mating, while under method M- 2 "Z" lines are generated through a system called self-sib mating. The derivation of the recurrence equation giving the inbreeding coefficient under method M-2 was presented as well as the expected efficiencies of the two methods relative to M-0.

Key Words: Zea mays L. • Sib Mating • Hybridization efficiency • Single-cross hybrids • Maize breeding

² Professor of plant breeding, Genetics Ctr., Postgraduate College, Chapingo, Mexico.

Received for publication October 31, 1980.

This article has been cited by other articles:

				A. R. Hallauer History, Contribution, and Future of Quantitative Genetics in Plant Breeding: Lessons From Maize Crop Sci., December 18, 2007; 47(Supplement_3): S-4 - S-19. [Abstract] [Full Text] [PDF]