Record Details

Genome-wide association analysis reveals new insights into the genetic architecture of defensive, agro-morphological and quality-related traits in cassava

CGSpace

View Archive Info
 
 
Field Value
 
Title Genome-wide association analysis reveals new insights into the genetic architecture of defensive, agro-morphological and quality-related traits in cassava
 
Creator Rabbi, Ismail Y.
Kayondo, S.I.
Bauchet, G.
Yusuf, M.
Aghogho, C.I.
Ogunpaimo, K.
Uwugiaren, R.
Smith, I.A.
Peteti, P.
Agbona, A.
Parkes, E.
Ezenwaka, L.
Wolfe, M.
Jannink, Jean-Luc
Egesi, C.
Kulakow, P.
 
Subject cassava
breeding
genomes
pest resistance
disease resistance
morphology
genotypes
 
Description OpenAccess Article; Published online: 30 Jul 2020
Cassava (Manihot esculenta) is one of the most important starchy root crops in the tropics due to its adaptation to marginal environments. Genetic progress in this clonally propagated crop can be accelerated through the discovery of markers and candidate genes that could be used in cassava breeding programs. We carried out a genome-wide association study (GWAS) using a panel of 5,310 clones developed at the International Institute of Tropical Agriculture - Nigeria. The population was genotyped at more than 100,000 SNP markers via genotyping-by-sequencing (GBS). Genomic regions underlying genetic variation for 14 traits classified broadly into four categories: biotic stress (cassava mosaic disease and cassava green mite severity); quality (dry matter content and carotenoid content) and plant agronomy (harvest index and plant type). We also included several agro-morphological traits related to leaves, stems and roots with high heritability. In total, 41 significant associations were uncovered. While some of the identified loci matched with those previously reported, we present additional association signals for the traits. We provide a catalogue of favourable alleles at the most significant SNP for each trait-locus combination and candidate genes occurring within the GWAS hits. These resources provide a foundation for the development of markers that could be used in cassava breeding programs and candidate genes for functional validation.
 
Date 2020
2021-01-25T14:54:57Z
2021-01-25T14:54:57Z
 
Type Journal Article
 
Identifier Rabbi, I.Y., Kayondo, S.I., Bauchet, G., Muyideen, Y., Aghogho, C.I., Ogunpaimo, K., ... & Kulakow, P. (2020). Genome-wide association analysis reveals new insights into the genetic architecture of defensive, agro-morphological and quality-related traits in cassava. Plant Molecular Biology, 1-19.
0167-4412
https://hdl.handle.net/10568/110973
https://doi.org/10.1007/s11103-020-01038-3
BIOMETRICS
BIOTECH & PLANT BREEDING
PLANT PRODUCTION & HEALTH
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 1-19
application/pdf
 
Source Plant Molecular Biology