QTL mapping of root traits in phosphorus-deficient soils reveals important genomic regions for improving NDVI and grain yield in barley.

摘要: Major QTLs for root rhizosheath size are not correlated with grain yield or response to phosphorus. Important were found improve phosphorus efficiency. Root traits important (P) acquisition, but they often difficult characterize and their breeding values seldom assessed under field conditions. This has shed doubts on using seedling-based criteria of select breed P efficiency. Eight controlled conditions in a barley doubled-haploid population soils differing levels. The was also phenotyped yield, normalized difference vegetation index (NDVI), uptake utilization efficiency at maturity (PutEGY) Several quantitative loci (QTLs) from the screening trials co-incident. diameter explained highest phenotypic variation comparison other traits. Shared between total length PutEGY. A common major QTL NDVI mapped HvMATE gene marker chromosome 4H. Collocations detected chromosomes 6H 7H. When results BIP MET combined, those NDVI. qGY5H, qGY6H qGY7Hb 7H robust improving selection multiple may be needed optimize outcomes due x Environment interaction. We suggest that alone is reliable trait predict yield.