Evolution of North American Dent Corn from Public to Proprietary Germplasm

Mikel, Mark A.; Dudley, J. W.

doi:10.2135/cropsci2005.10-0371

Cited by 187 publications

(281 citation statements)

References 17 publications

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“…Maize B73 used in the mapping study has been widely used for genome analyses and breeding for several agronomically important traits (Troyer 1999, Mikel andDudley 2006). Also, in our previous study, B73 exhibited a higher degree of flooding tolerance at the seedling stage among the 223 maize accessions (Mano et al 2002), but this accession has not yet been observed to form surface roots during flooding or root aerenchyma development.…”

Section: Discussionmentioning

confidence: 85%

QTL mapping of root angle in F2 populations from maize B73 × teosinte Zea luxurians

Omori

Mano

2007

Plant Root

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Section: Discussionmentioning

confidence: 85%

QTL mapping of root angle in F2 populations from maize B73 × teosinte Zea luxurians

Omori

Mano

2007

Plant Root

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“…Twelve genetically diverse lines that represent important heterotic subgroups in the current US maize commercial germplasm base were used in this study ( Johnson, 2008;Mikel and Dudley, 2006), among these, were two public inbreds and 10 proprietary inbreds for which Plant Variety Protection (PVP) has expired (Mikel, 2006) (Supplemental Table S1). These lines served as ancestors in the development of current elite inbreds and represent a vast amount of the genetic diversity in the current US maize commercial germplasm pool.…”

Section: Plant Materialsmentioning

confidence: 99%

Genetic Factors Underlying Dry‐Milling Efficiency and Flaking‐Grit Yield Examined in US Maize Germplasm

et al. 2016

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A small but important proportion of US maize (Zea mays L.) grain is channeled to create breakfast cereals and other food products; yet, little focus has been devoted to genetic improvement of corn hybrids to meet needs of dry millers and other end users in the cereal pipeline. This study was designed to evaluate a broad range of US maize germplasm for key dry‐milling traits: dry‐milling efficiency (DME), the proportion of flaking grits produced from dry‐milled maize grain, and flaking‐grit yield (FGY), the amount of flaking grits produced per unit land. Genetic parameters for DME and FGY were characterized based on grain produced over 3 yr, and the associations between dry‐milling, agronomic, ear, and kernel traits were assessed. Means for DME among experimental hybrids ranged from 24.0 to 36.0%. The DME was negatively correlated with grain yield and positively correlated with test weight; associations with other ear and kernel traits were weak despite being statistically significant in some cases. The DME is moderately heritable (h2 = 0.53) and controlled largely by additive gene action. A moderate amount (31%) of the variation in FGY was explained by multiple linear regression of grain yield and simple physical kernel properties: test weight, kernel thickness, and 100‐kernel volume. Genetic variation for DME in US maize germplasm was demonstrated, which could be exploited to develop new maize hybrids with improved DME and, ultimately, FGY. However, more work is needed to develop indirect selection approaches to predict DME and FGY at or before harvest.

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“…Mikel and Dudley (2006) compiled a database of maize lines for which Plant Variety Protection (PVP) had expired by 2004, assessing the number of times each line was used as an ancestor in developing new elite inbreds. From this work, 12 inbreds were identified as representing a vast amount of the genetic diversity in the current maize commercial germplasm pool ( Johnson, 2008).…”

Section: Germplasmmentioning

confidence: 99%

Survey of Plant Density Tolerance in U.S. Maize Germplasm

2014

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A broad range of U.S. maize (Zea mays L.) germplasm was evaluated for plant density tolerance (PDT) to identify potential sources of favorable alleles and to obtain a better understanding the underlying genetics involved. Thirty‐two hybrids created using a set of inbreds representing parentage of key heterotic subgroups were evaluated at plant densities ranging from 47,000 (19,000 plants per acre [ppA]) to 133,000 plants ha−1 (54,000 ppA). Forty‐eight phenotypic traits from five categories (photosynthetic capability, plant architecture, growth responses, source–sink relationship, and general stress tolerance) as well as grain yield were evaluated in three environments that differed for levels of soil moisture availability. The relationship between plant density and grain yield was assessed for each hybrid, with a wide range of responses observed. Five hybrids showed substantial tolerance to plant densities ≥116,000 plants ha−1 based on grain yield performance. Phenotypic trait correlations revealed a subset of traits associated with grain yield across plant densities, with all five categories of traits implicated directly; the subset included leaf angle, upper stem diameter, leaf area required to produce a gram of grain, kernel rows per ear, days to canopy closure, barrenness, kernels per plant, kernel length, leaf number, upper leaf area, staygreen, zipper effect, kernels per row, and anthesis–silking interval. Analysis of gene action for grain yield across plant densities emphasized the prominence of additivity, the increasing importance of nonadditivity as plant density and environmental stress levels increased, and genotype by environment interaction. This work paves the way for further characterization of PDT through quantitative trait locus mapping and candidate gene approaches.

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Evolution of North American Dent Corn from Public to Proprietary Germplasm

Abstract: Current corn (Zea mays L.) hybrids are produced using proprietary inbred lines as parents. These proprietary lines are protected by U.

Cited by 187 publications

References 17 publications

QTL mapping of root angle in F<sub>2</sub> populations from maize B73 × teosinte <i>Zea luxurians</i>

QTL mapping of root angle in F<sub>2</sub> populations from maize B73 × teosinte <i>Zea luxurians</i>

Genetic Factors Underlying Dry‐Milling Efficiency and Flaking‐Grit Yield Examined in US Maize Germplasm

Survey of Plant Density Tolerance in U.S. Maize Germplasm

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Evolution of North American Dent Corn from Public to Proprietary Germplasm

Abstract: Current corn (Zea mays L.) hybrids are produced using proprietary inbred lines as parents. These proprietary lines are protected by U.

Cited by 187 publications

References 17 publications

QTL mapping of root angle in F<sub>2</sub> populations from maize B73 × teosinte <i>Zea luxurians</i>

QTL mapping of root angle in F<sub>2</sub> populations from maize B73 × teosinte <i>Zea luxurians</i>

Genetic Factors Underlying Dry‐Milling Efficiency and Flaking‐Grit Yield Examined in US Maize Germplasm

Survey of Plant Density Tolerance in U.S. Maize Germplasm

Contact Info

Product

Resources

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QTL mapping of root angle in F<sub>2</sub> populations from maize B73 × teosinte <i>Zea luxurians</i>

QTL mapping of root angle in F<sub>2</sub> populations from maize B73 × teosinte <i>Zea luxurians</i>