Population improvement:
A way of exploiting the
RICE
genetic resources of Latin America
Edited by
Elcio Perpétuo Guimarães
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome, 2005
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Population improvement: Edited by |
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Contact information:
Food and Agriculture Organization of the United Nations (FAO)
Viale delle Terme di Caracalla
00100 Rome, Italy
E-mail: [email protected]
Centre de coopération internationale en recherche agronomique pour le
développement-Département des cultures annuelles (CIRAD-CA)
A.A. 6713, Cali, Colombia
E-mail: [email protected]
Centro Internacional de Agricultura Tropical (CIAT)
International Center for Tropical Agriculture
A.A. 6713, Cali, Colombia
E-mail: [email protected]
Embrapa Arroz e Feijão
75375-000 Santo Antônio de Goiás, GO, Brazil
E-mail: [email protected]
Fundación para la Investigation Agricola-DANAC Apdo. Postal 182
Carretera San Javier-Guarataro, estado Yaracuy, Venezuela
E-mail: [email protected]
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© FAO 2005
Introduction
Introgression of resistance genes
New gene combinations for obtaining varieties
Hybrid rice
Population improvement
Final commentsChapter 2: Genetic Mean and Variability in Recurrent Selection
Orlando Peixoto de MoraisIntroduction
Importance of the population mean
Genetic variation
Final commentsChapter 3: Selection Indices for Population Improvement Programmes
Isaias Olivio GeraldiIntroduction
Basic principles of using selection indices
Response to selection based on indices
An example of using an index
Final commentsIntroduction
Different types of molecular markers
Molecular markers for diversity studies
Molecular markers for mapping and marker-assisted selection
Possible use in population improvement programmes
Final commentsIntroduction
Does population PFD-1 have a broad genetic base?
Is genetic variability maintained between cycles 0 and 1?
Does using male sterility ensure free recombination of alleles within and between genes?
Final commentsIntroduction
Breeding objectives
Diagnosing production problems and farmers’ demands
Sources of genetic materials for participatory breeding
Population improvement and line development
Participatory selection of lines
Prospects for the project in the region
Expected results
Introduction
Developing and managing new populations
Future plansIntroduction
Methodology used for population improvement in Chile
Methodology used for developing population lines
Pedigree method
Anther culture
Developing populations
Population improvement
Line development
Prospects for population improvement in ChileIntroduction
Genetic gain observed for yield in population CNA-IRAT 4
Effect of the number of recombination cycles on population CNA-5
Evaluating the genetic potential of population CNA-11
Synthesizing and improving populations without using male sterility
Developing irrigated rice cultivars through recurrent selection
Final commentsIntroduction
Population improvement
Population PFD-2
Population PFD-1
Population PFD-1 (BE)
Population PCT-16
Population PCTFD-20
Developing lines
Final commentsIntroduction
Characterizing new populations
Maintaining populations and conserving genetic variability
Population improvement for blast
Population improvement for low temperatures
How to unify population improvement with the classic method
Results of developing lines from populations
Prospects and future work plansIntroduction
Characterizing introduced populations
Introduced populations and their management
Strategies for developing lines by exploiting populations
Results of strategies for selecting lines
Prospects for the methodology and future plansIntroduction
Basic concepts
Evolving studies
Strategies for population improvement
Developing lines from the improved populations
Selecting lines for national programmes
Evaluating genetic diversity
Final commentsIntroduction
Genetic improvement strategy for resistance to Rhizoctonia solani
Criteria for selecting parental materials
Reaction of germplasm to the pathogen Rhizoctonia solani
Strategy for creating the population
Strategy for managing the population
Expected resultsImportance of rice and its quality
Genetic base and heritability of quality traits
Recurrent selection for improving quality
Materials and methods
Evaluating grain quality
Recurrent selection cycles
Preliminary results and discussion
Final comments, future plansIntroduction
Creating and managing the population
Evaluation strategy and experimental design
Study of genetic gain
Conclusions and recommendationsIntroduction
Where, how and the materials used
Discussing the results
Population performance in acid soils
Response to selection and to recombinations
General discussion and recommendations