Identification and validation of QTL for spike fertile floret and fruiting efficiencies in hexaploid wheat (Triticum aestivum L.)
| Autor: | Leonardo Sebastián Vanzetti, Martin W. Ganal, Ignacio Ismael Terrile, Marion S. Röder, Jörg Plieske, Andreas Börner, Nicole Pretini, Fernanda G González |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Genotype Population Quantitative Trait Loci Flowers Quantitative trait locus Biology Haploidy 01 natural sciences Polyploidy Anthesis Dry weight Genetics education Alleles Triticum education.field_of_study Chromosome Mapping General Medicine Horticulture Phenotype Yield (chemistry) Plant biochemistry Seeds Doubled haploidy Spike (software development) Agronomy and Crop Science 010606 plant biology & botany Biotechnology |
| Zdroj: | TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik. 133(9) |
| ISSN: | 1432-2242 |
| Popis: | This study identified and validated two QTL associated with spike fertile floret and fruiting efficiencies. They represent two new loci to use in MAS to improve wheat yield potential. The spike fruiting efficiency (FE—grains per unit spike dry weight at anthesis, GN/SDW) is a promising trait to improve wheat yield potential. It depends on fertile floret efficiency (fertile florets per unit SDW—FFE, FF/SDW) and grain set (grains per fertile floret—GST). Given its difficult measurement, it is often estimated as the grains per unit of nongrain spike dry weight at maturity (FEm). In this study, quantitative trait loci (QTL) were mapped using a double haploid population (Baguette 19/BIOINTA 2002, with high and low FE, respectively) genotyped with the iSelect 90 K SNP array and evaluated in five environments. We identified 37 QTL, but two were major with an R2 > 10% and stable for being at least present in three environments: the QFEm.perg-3A (on Chr. 3A, 51.6 cM, 685.12 Mb) for FEm and the QFFE.perg-5A (on Chr. 5A, 42.1 cM, 461.49 Mb) for FFE, FE and FEm. Both QTL were validated using two independent F2 populations and KASP markers. For the most promising QTL, QFFE.perg-5A, the presence of the allele for high FFE resulted in + 4% FF, + 9% GN, + 13% GST, + 16% yield gSDW−1 and + 5% yield spike−1. QFEm.perg-3A and QFFE.perg-5A represent two new loci to use in MAS to improve wheat yield potential. |
| Databáze: | OpenAIRE |
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