Selective Advance for Accelerated Development of Recombinant Inbred QTL Mapping Populations
| Autor: | Prashanth Boddhireddy, James C. Nelson, Jean-Luc Jannink |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
0106 biological sciences
Genetics 0303 health sciences education.field_of_study Population Selfing Biology Quantitative trait locus 01 natural sciences Loss of heterozygosity 03 medical and health sciences Gene mapping Inbred strain education Agronomy and Crop Science Selection (genetic algorithm) Recombination 030304 developmental biology 010606 plant biology & botany |
| Zdroj: | Crop Science. 49:1284-1294 |
| ISSN: | 1435-0653 0011-183X |
| DOI: | 10.2135/cropsci2008.06.0368 |
| Popis: | Quantitative trait locus (QTL) mapping resolution of recombinant inbred lines (RILs) is limited by the amount of recombination they experience during development. Intercrossing during line development can be used to counter this disadvantage but requires additional generations and is difficult in self-pollinated species. It is desirable to improve mapping resolution for success of marker-assisted selection and map-based cloning. Here we propose a way of achieving this through recombination enrichment. This method is based on genotyping at each generation and advancing lines selected for high recombination and/or low heterozygosity. In simulations, the method yields lines that represent up to twice as many recombination events as RILs developed conventionally by selfing without selection, or the same amount but in three generations, without reduction in homozygosity. Compared to methods that require maintaining a large population for several generations and selecting lines only from the finished population, the method proposed here achieves up to 25% more recombination. The precision of QTL location is increased by up to 10% with negligible drop in QTL detection power at average marker intervals of 5 cM or less. |
| Databáze: | OpenAIRE |
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