ArticlePloS one2018
An EST-SSR based genetic linkage map and identification of QTLs for anthracnose disease resistance in water yam (Dioscorea alata L.).
Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 28 citations in OpenAlex.
- Genome-wide association study revealed genomic regions associated with tuber quality traits in water yam (Dioscorea alata L.).PloS one · 2026Article
- Advances and prospects of genomic-assisted breeding in roots, tubers, and banana crops.Frontiers in plant science · 2026Review
- Identification of diagnostic KASP-SNP markers for routine breeding activities in yam (Dioscorea spp.).The plant genome · 2024Article
- Article
- Genetic diversity and population structure of Uganda's yam (Dioscorea spp.) genetic resource based on DArTseq.PloS one · 2023Article
- Identification and validation of QTLs for tuber quality related traits in greater yam (Dioscorea alata L.).Scientific reports · 2022Article
- Chromosome evolution and the genetic basis of agronomically important traits in greater yam.Nature communications · 2022Article
- Article
- Strategies to combat the problem of yam anthracnose disease: Status and prospects.Molecular plant pathology · 2021Review
- Biotechnological strategies for the sustainable production of diosgenin from Dioscorea spp.Applied microbiology and biotechnology · 2021Review
- Genome-Wide Identification and Evolutionary Analysis ofFrontiers in genetics · 2020Article
- Phenotypic and molecular assessment of genetic structure and diversity in a panel of winged yam (Dioscorea alata) clones and cultivars.Scientific reports · 2019Article
- A reference high-density genetic map of greater yam (Dioscorea alata L.).TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2019Article
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10 authors at 3 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
Water yam (Dioscorea alata L.) is one of the most important food yams with wide geographical distribution in the tropics. One of the major constraints to water yam production is anthracnose disease caused by a fungus, Colletotrichum gloeosporioides (Penz.). There are no economically feasible solutions as chemical sprays or cultural practices, such as crop rotation are seldom convenient for smallholder farmers for sustainable control of the disease. Breeding for development of durable genetic resistant varieties is known to offer lasting solution to control endemic disease threats to crop production. However, breeding for resistance to anthracnose has been slow considering the biological constraints related to the heterozygous and vegetative propagation of the crop. The development of saturated linkage maps with high marker density, such as SSRs, followed by identification of QTLs can accelerate the speed and precision of resistance breeding in water yam. In a previous study, a total of 1,152 EST-SSRs were developed from >40,000 EST-sequences generated from two D. alata genotypes. A set of 380 EST-SSRs were validated as polymorphic when tested on two diverse parents targeted for anthracnose disease and were used to generate a saturated linkage map. Majority of the SSRs (60.2%) showed Mendelian segregation pattern and had no effect on the construction of linkage map. All 380 EST-SSRs were mapped into 20 linkage groups, and covered a total length of 3229.5 cM. Majority of the markers were mapped on linkage group 1 (LG 1) comprising of 97 EST-SSRs. This is the first genetic linkage map of water yam constructed using EST-SSRs. QTL localization was based on phenotypic data collected over a 3-year period of inoculating the mapping population with the most virulent strain of C. gloeosporioides from West Africa. Based on threshold LOD scores, one QTL was consistently observed on LG 14 in all the three years and average score data. This QTL was found at position interval of 71.1-84.8 cM explaining 68.5% of the total phenotypic variation in the average score data. The high marker density allowed identification of QTLs and association for anthracnose disease, which could be validated in other mapping populations and used in marker-assisted breeding in D. alata improvement programmes.
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