Journal Article

QTL mapping reveals genetic determinants of fungal disease resistance in the wild lentil species Lens ervoides

Bhadauria, Vijai, Ramsay, Larissa, Bett, Kirstin E., Banniza, Sabine

2017

Overview

Lens ervoides , a wild relative of lentil is an important source of allelic diversity for enhancing the genetic resistance of the cultivated species against economically important fungal diseases, such as anthracnose and Stemphylium blight caused by Colletotrichum lentis and Stemphylium botryosum , respectively. To unravel the genetic control underlying resistance to these fungal diseases, a recombinant inbred line (RIL) population (n = 94, F 9 ) originating from a cross between two L. ervoides accessions, L01-827A and IG 72815, was genotyped on the Illumina HiSeq 2500 platform. A total of 289.07 million 100 bp paired-end reads were generated, giving an average 7.53-fold genomic coverage to the RILs and identifying 2,180 high-quality SNPs that assembled in 543 unique haplotypes. Seven linkage groups were resolved among haplotypes, equal to the haploid chromosome number in L. ervoides . The genetic map spanned a cumulative distance of 740.94 cM. Composite interval mapping revealed five QTLs with a significant association with resistance to C. lentis race 0, six QTLs for C. lentis race 1 resistance, and three QTLs for S. botryosum resistance. Taken together, the data obtained in the study reveal that the expression of resistance to fungal diseases in L. ervoides is a result of rearrangement of resistant alleles contributed by both parental accessions.

• Publisher: Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
• Subject: 45/22 / 45/23 / 631/208/8 / 631/449/711 / Anthracnose / Ascomycota - physiology / Blight / Chromosome Mapping / Chromosome number / Chromosomes, Plant - genetics / Colletotrichum - physiology / Crosses, Genetic / Disease resistance / Disease Resistance - genetics / Economic importance / Fungal diseases / Gene loci / Gene mapping / Genes, Plant - genetics / Genetic control / Genetic diversity / Genotype / Haplotypes / Humanities and Social Sciences / Hybrid Vigor - genetics / Immunoglobulins / Inbreeding / Lens Plant - classification / Lens Plant - genetics / Lens Plant - microbiology / multidisciplinary / Plant Diseases - genetics / Plant Diseases - microbiology / Polymorphism, Single Nucleotide / Quantitative trait loci / Quantitative Trait Loci - genetics / Science / Science (multidisciplinary) / Single-nucleotide polymorphism / Species Specificity / Stemphylium