RT Journal Article
T1 Genetic dissection for maize forage digestibility traits in a multi-parent advanced generation intercross (MAGIC) population
A1 López Malvar, Ana
A1 Malvar, Rosa Ana
A1 Butrón Gómez, Ana María
A1 Revilla, Pedro
A1 Pereira Crespo, Sonia
A1 Santiago Carabelos, Rogelio
K1 3103.01 Producción de Cultivos
K1 3206.01 Digestión
K1 2401.18 Mamíferos
AB Forage feedstock is the greatest source of energy for livestock. Unfortunately, less than 50% of their fiber content is actually digested and assimilated by the ruminant animals. This recalcitrance is mainly due to the high concentration of plant cell wall material and to the limited digestion of the fiber by the microorganisms. A Genome-Wide Association Study (GWAS) was carried out in order to identify Single Nucleotide Polymorphisms (SNPs) associated with forage digestibility traits in a maize Multi-Parent Advanced Generation Intercross (MAGIC) population. We identified seven SNPs, corresponding to five Quantitative Trait Loci (QTL), associated to digestibility of the organic matter, 11 SNPs, clustered in eight QTLs, associated to Neutral Detergent Fiber (NDF) content and eight SNPs corresponding with four QTL associated with Acid Detergent Fiber (ADF). Candidate genes under the QTL for digestibility of the organic matter could be the ones involved in pectin degradation or phenylpropanoid pathway. Transcription factor genes were also proposed for the fiber QTL identified, in addition to genes induced by oxidative stress, or a gene involved in lignin modifications. Nevertheless, for the improvement of the traits under study, and based on the moderate heritability value and low percentage of the phenotypic variability explained by each QTL, a genomic selection strategy using markers evenly distributed across the whole genome is proposed.
PB Agronomy
SN 20734395
YR 2021
FD 2021-01-07
LK http://hdl.handle.net/11093/1928
UL http://hdl.handle.net/11093/1928
LA eng
NO Agronomy, 11(1): 104 (2021)
NO Ministerio de Ciencia, Innovación y Universidades | Ref. RTI2018–096776-B-C21
DS Investigo
RD 18-abr-2025