Genome-wide association mapping of latex yield and girth in Amazonian accessions of Hevea brasiliensis grown in a suboptimal climate zone
| Autor: | Sithichoke Tangphatsornruang, Kittipat Ukoskit, Ratchanee Rattanawong, Vipavee Chanroj, Thitaporn Phumichai |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Candidate gene Linkage disequilibrium Latex Quantitative Trait Loci Outcrossing Single-nucleotide polymorphism Genome-wide association study Biology Polymorphism Single Nucleotide Linkage Disequilibrium 03 medical and health sciences Botany Genetics Association mapping Sequence Analysis RNA Gene Expression Profiling Chromosome Mapping biology.organism_classification Adaptation Physiological Horticulture Phenotype 030104 developmental biology Genetic distance Hevea Hevea brasiliensis Genome Plant |
| Zdroj: | Genomics. 109:475-484 |
| ISSN: | 0888-7543 |
| DOI: | 10.1016/j.ygeno.2017.07.005 |
| Popis: | Latex yield and growth are the key complex traits in commercial rubber production. The present study is the first to report genome-wide association mapping of latex yield and girth, for 170 Amazonian accessions grown in a suboptimal area characterized by limited rainfall and a lengthy dry season. Targeted sequence enrichment to capture gene transcripts generated 14,155 high quality filtered single nucleotide polymorphisms (SNPs) of which 94.3% resided in coding regions. The rapid decay of linkage disequilibrium over physical and genetic distance found in the accessions was comparable to those previously reported for several outcrossing species. A mixed linear model detected three significant SNPs in three candidate genes involved in plant adaptation to drought stress, individually explaining 12.7–15.7% of the phenotypic variance. The SNPs identified in the study will help to extend understanding, and to support genetic improvement of rubber trees grown in drought-affected regions. |
| Databáze: | OpenAIRE |
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