QTL Mapping of Tropical Maize Grain Components Associated with Maize Weevil Resistance

The maize weevil (MW), Sitophilus zeamais (Motsch.), is a globally distributed pest that causes severe losses in stored maize (Zea mays L.) worldwide. A previous study identified quantitative trait loci (QTL) contributing to reduced grain damage and losses by MW in the maize mapping population CML29...

Full description

Saved in:
Bibliographic Details
Published in:Crop science 2010-05, Vol.50 (3), p.815-825
Main Authors: García-Lara, Silverio, Burt, Andrew J, Arnason, John T, Bergvinson, David J
Format: Article
Language:English
Subjects:
Acids
Agronomy. Soil science and plant productions
Biological and medical sciences
Biosynthesis
cell wall components
chromosome mapping
corn
coumaric acids
diferulic acid
ferulic acid
food composition
Fundamental and applied biological sciences. Psychology
genetic resistance
genetic variance
genetic variation
Genetics
Genetics and breeding of economic plants
genome
Genomics
heritability
insect pests
isomers
pest resistance
phenolic acids
phenotypic variation
putrescine
quantitative trait loci
resistance mechanisms
Sitophilus zeamais
storage pests
Varietal selection. Specialized plant breeding, plant breeding aims
Zea mays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The maize weevil (MW), Sitophilus zeamais (Motsch.), is a globally distributed pest that causes severe losses in stored maize (Zea mays L.) worldwide. A previous study identified quantitative trait loci (QTL) contributing to reduced grain damage and losses by MW in the maize mapping population CML290 x Muneng-8128C0HC1-18-2-1-1. This study was conducted to identify QTL associated with the identified biochemical bases of resistance in the maize grain. Eleven traits were analyzed on grain samples from F2 lines across two environments: p-coumaric acid (p-CA), cis- and trans-ferulic acid (FA), four isomers of diferulic acids (DiFA), phenolic acid amides (p-coumaroyl-feruloyl putrescine [CFP] and diferuloyl putrescine [DFP]), total DiFA and total phenols acids (PhA). Significant variations were observed for most of the traits, while heritabilities ranged from 0.09 to 0.79. Ten QTL were identified for trans- and cis-FA, 8,5'-DiFA, 8-O-4'-DiFA, 8,5'-diferulic acid benzofuran form, DFP, and CFP while seven QTL were identified for p-CA, 5,5'-DiFA, FA, total DiFAs, and total PhA. These QTL were dispersed across the maize genome and explain between 25 and 47% of the phenotypic variance (2p) and 50 to 98% of the genotypic variance (2g). Nine regions were common between QTL associated with MW susceptibility and cell wall bound compounds, suggesting a strong genetic association with MW resistance in tropical maize.
ISSN:0011-183X
1435-0653
1435-0653
DOI:10.2135/cropsci2009.07.0415