Quantitative Trait Locus Analysis of Stalk Strength in Four Maize Populations

By Sherry Flint-Garcia, C. Jampatong, L. L. Darrah, Michael D. McMullen. Crop science, 2003

163 citations recorded by the source corpus.

Stalk lodging in maize (Zea mays L.) causes yield losses estimated to range from 5 to 20% annually worldwide. Selection for rind penetrometer resistance (RPR) has proven useful in enhancing germplasm for stalk strength, and therefore improving stalk lodging resistance. We conducted quantitative trait locus (QTL) analysis for RPR in four F 2.3 populations. The populations were constructed by means of combinations of MoSCSSS-High (selection for high RPR), MoSCSSS-Low (selection for low RPR), MoSQB-Low (selection for low stalk crushing strength), inbred line Mo47, and inbred line B73. Individuals in each population were genotyped for simple sequence repeat (SSR) or restriction fragment length polymorphism (RFLP) markers, and data were collected for RPR over multiple locations and replications. Means combined over environments were used as trait data for composite interval mapping by QTL Cartographer. Eight, 10, eight, and nine single-effect QTL and four, two, zero, and five epistatic interactions were detected for RPR in the four populations. Multilocus models, including the single-effect QTL and epistatic interactions, accounted for 33.4, 44.7, 48.4, and 58.7% of the total phenotypic variation. These data dearly indicate the complex nature of stalk strength. One chromosomal region contained a QTL from all four populations, while two QTL were in common among three of the four populations and five QTL were in common between two populations. Candidate genes that overlap QTL confidence intervals include those involved in lignin synthesis, the phenylpropanoid pathway, and the timing of vegetative phase change.

Subfields: Agronomy and Crop Science, Genetics, Plant Science

View Paper: https://www.semanticscholar.org/paper/342d784b820c7fb561ee6173b375b245ca329be0

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In Agronomy and Crop Science

1. Adrian C. Newton
2. Diego Rubiales

In Genetics

1. M. V. Vaz Patto
2. Jerzy H. Czembor

In Plant Science

1. Adrian C. Newton
2. M. V. Vaz Patto
3. Jerzy H. Czembor
4. Diego Rubiales

Citations in the corpus

• Comprehending crystalline β-carotene accumulation by comparing engineered cell models and the natural carotenoid-rich system of citrus (2011, unknown): “Standability is a critically important trait for mass production agriculture (Betrán et al., 2003; Flint-Garcia et al., 2003).”
• Maize stalk lodging: Flexural stiffness predicts strength (2016, background): “Yield losses in maize due to stalk lodging (breakage of the stalk below the ear) range from 5 to 20% annually worldwide (Flint-Garcia et al., 2003).”
• Cereal landraces for sustainable agriculture. A review (2010, background): “An exciting development in the potential exploitation of landrace germplasm is the considerable interest in using association-based approaches to identify candidate genes or regions underpinning complex traits (Gaut and Long, 2003; Flint-Garcia et al., 2003; Gupta et al., 2005).”
• Corn Stalk Lodging: A Forensic Engineering Approach Provides Insights into Failure Patterns and Mechanisms (2015, background): “However, the genetic relationships for these methods have proven to be weak to moderate (Flint-Garcia et al., 2003a,b,c; Peiffer et al., 2013; Hu et al., 2013).”
• Maize Stalk Lodging: Morphological Determinants of Stalk Strength (2017, unknown): “In particular, the problem of late-season stalk lodging (breakage of the stalk prior to harvest but after reproductive stage six) has been estimated to reduce worldwide corn yields by 5 to 20% (Flint-Garcia et al., 2003; Hu et al., 2013).”