Breeding maize for tolerance to acid soils
1998
Franje, N.S. | Franje, H.E. (Central Mindanao Univ., Musuan, Bukidnon (Philippines))
A successful attempt to incorporate yield with tolerance to acid soils was made possible through an almost 10 years of careful "eye for selection" process. It involved keeping of the potential pollinators and the acid tolerant female based materials under the crossing blocks, the progeny yield trials and the observation plots. The exotic male sources were chosen based on specific combining ability, relative yields, and level of tolerance to acid soils. Then backcross method of breeding was more effective over the other methods. Moreover, the pedigree selection process kept tract of the individual performance of the progenies of a cross and facilitated the evaluation of the progenies stability and culling of the undesirable. After conducting adaptability tests to acid soils of several hundreds and thousands of introduction in 1984, five promising acid soils tolerant, open-pollinated, white flint CMU corn selections were recommended for seed increase by the Corn and Sorghum Varietal Improvement Group of the National Seed Industry Council. These selections - CMU 9422, CMU 9424, CMU 9423, CMU 9425, and CMU 9421 will be recommended for commercial release after a 5-ton seed requirement is available for distribution
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