Mapping quantitative trait loci for heat tolerance of reproductive traits in tomato (Solanum lycopersicum)
| Autor: | Ivo Rieu, Marc J. M. Rutten, Wim H. Vriezen, Nicky Driedonks, Gert-Jan de Boer, Jiemeng Xu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Population Stamen Molecular Plant Physiology Plant Science Quantitative trait locus Biology medicine.disease_cause 01 natural sciences 03 medical and health sciences Pollen Botany Genetics medicine education Molecular Biology GeneralLiterature_REFERENCE(e.g. dictionaries encyclopedias glossaries) 2. Zero hunger education.field_of_study Reproductive success food and beverages Sexual reproduction 030104 developmental biology Inflorescence Trait Agronomy and Crop Science 010606 plant biology & botany Biotechnology |
| Zdroj: | Molecular Breeding, 37, 1-9 Molecular Breeding, 37, 5, pp. 1-9 |
| ISSN: | 1380-3743 |
| Popis: | Global warming has become a worldwide concern due to its adverse effects on agricultural output. In particular, long-term mildly high temperatures interfere with sexual reproduction and thus fruit and seed set. To uncover the genetic basis of observed variation in tolerance against heat, a bi-parental F2 mapping population from two contrasting cultivars, i.e. Nagcarlang and NCHS-1, was generated and phenotyped under continuous mild heat conditions for a number of traits underlying reproductive success, i.e. pollen viability, pollen number, style length, anther length, style protrusion, female fertility and flowering characteristics, i.e. inflorescence number and flowers per inflorescence. Quantitative trait loci (QTLs) were identified for most of these traits, including a single, highly significant one for pollen viability, which accounted for 36% of phenotypic variation in the population and modified pollen viability under high temperature with around 20%. QTLs for some traits colocalised, indicating trait dependency or pleiotropic-effect loci. We conclude that a limited set of major genes determines differences in performance of reproductive traits under continuous mild heat in tomato. The results contribute to our fundamental understanding of pollen thermotolerance and may support development of more heat-tolerant tomato varieties. |
| Databáze: | OpenAIRE |
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