Effect of Recurrent Selection on Combining Ability in Maize Breeding Populations
Autor: | L. Kannenberg, Elizabeth A. Lee, T. K. Doerksen |
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Rok vydání: | 2003 |
Předmět: |
0106 biological sciences
2. Zero hunger Genetics education.field_of_study Population Recurrent selection 04 agricultural and veterinary sciences Biology 01 natural sciences Diallel cross Animal science Genetic variation Genetic structure 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Additive genetic effects Allele education Agronomy and Crop Science Selection (genetic algorithm) 010606 plant biology & botany |
Zdroj: | Crop Science. 43:1652-1658 |
ISSN: | 1435-0653 0011-183X |
DOI: | 10.2135/cropsci2003.1652 |
Popis: | Recurrent selection (RS) is a population improvement method that increases the frequency of favorable alleles while maintaining genetic variation in breeding populations. Twelve University of Guelph RS maize (Zea mays L.) populations selected via reciprocal recurrent selection (RRS), selfed-progeny recurrent selection (S), or a method combining RRS and S (COM), were assessed for changes in the genetic structure of grain yield, grain moisture, and broken stalks, and two associated selection indices. Partitioning of the entry sums of squares from diallel matings of the original (C 0 ) and advanced (C A ) cycle populations using Gardner and Eberhart's Analysis II and Analysis III indicated genetic improvement occurred for the per se and cross performance of most populations. Accompanying the favorable changes in population performance were less favorable shifts from predominantly additive genetic effects in C 0 to greater nonadditive genetic effects in C A . This shift did not substantially change the general combining ability estimates (g i ) of most populations. However, for grain yield, the underlying components of g; effects were altered in their relative importance. General combining ability (GCA) effects in the C 0 were caused primarily by the population per se effects (v i ), while in C A the GCA effects were caused predominately by parental heterotic effects (h i ). |
Databáze: | OpenAIRE |
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