Nov 8, 2018

Elucidating the genetic basis of biomass accumulation and radiation use efficiency in spring wheat and its role in yield potential

BioRxiv : the Preprint Server for Biology
Gemma MoleroMatthew Reynolds

Abstract

One of the major challenges for plant scientists is increasing wheat (Triticum aestivum) yield potential (YP). A significant bottleneck for increasing YP is achieving increased biomass through optimization of Radiation Use Efficiency (RUE) along the crop cycle. Exotic material such as landraces and synthetic wheat has been incorporated into breeding programs in an attempt to alleviate this, however their contribution to YP is still unclear. To understand the genetic basis of biomass accumulation and RUE we applied genome-wide association study (GWAS) to a panel of 150 elite spring wheat genotypes including many landrace and synthetically derived lines. The panel was evaluated for 31traits over two years under optimal growing conditions and genotyped using the 35K Wheat Breeders array. Marker-trait-association identified 94 SNPs significantly associated with yield, agronomic and phenology related traits along with RUE and biomass at various growth stages that explained 7-17 % of phenotypic variation. Common SNP markers were identified for grain yield, final biomass and RUE on chromosomes 5A and 7A. Additionally we show that landrace and synthetic derivative lines showed higher thousand grain weight (TGW), biomass and RUE but low...Continue Reading

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Mentioned in this Paper

Biological Markers
Genome-Wide Association Study
Study
Genome
Candidate Disease Gene
Avian Crop
LUC7L3 gene
Evaluation
Area 5a of Vogts
Mry protein, Streptococcus pyogenes

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