Main effect QTLs associated with arsenic phyto-toxicity tolerance at seedling stage in rice (Oryza sativa L.)
| Autor: | G. K. M. Mustafizur Rahmam, John M. Duxbury, Golam M. Panaullah, MA Khaleque Mian, J.G. Lauren, Partha S. Biswas, Md. Abu Syed, Md. Golam Rasul, K. M. Iftekharuddaula |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Population chemistry.chemical_element Plant Science 010501 environmental sciences Horticulture Biology Quantitative trait locus 01 natural sciences Genetics Cultivar education Arsenic 0105 earth and related environmental sciences education.field_of_study Oryza sativa fungi food and beverages Plant physiology biology.organism_classification Agronomy chemistry Seedling Shoot Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Euphytica. 209:805-814 |
| ISSN: | 1573-5060 0014-2336 |
| Popis: | Arsenic phyto-toxicity is a limiting factor affecting rice production in the Indo-Gangetic flood plain. In this study, 98 microsatellite markers were used to map quantitative trait loci (QTL) conferring arsenic phyto-toxicity tolerance (AsT) at seedling stage from a F2 population derived from a cross between an arsenic sensitive indica rice cultivar (BRRI dhan45) and an arsenic tolerant indica rice cultivar (BRRI dhan47) using selective genotyping technique. Arsenic phyto-toxicity tolerance of F2:3 population was assessed with an arsenic stress of 1.25 mg L−1 under hydroponic culture in a climate chamber. AsT indices for shoot length, root length and root-shoot biomass were estimated in terms of comparative growth in treated plants compared to that in control plants. A total of four main effect QTLs with significant LOD comprising two for relative growth in shoot length, one for each of root length and root-shoot biomass under arsenic stress were identified on chromosomes 8 and 12 using composite interval mapping approach. A large effect QTL for arsenic phyto-toxicity tolerance in root length contributing 24.9 % phenotypic variation was identified on chromosome 8 with plausible pleiotropic effect on shoot length and root-shoot biomass. |
| Databáze: | OpenAIRE |
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