Registration of ‘Catoosa’ Soybean

The ability of soybean breeders to accurately, economically, and rapidly determine the transfer of the CP4 gene, the gene which confers soybean tolerance to the herbicide glyphosate, to elite soybean lines is essential to development of new glyphosate tolerant soybean (GTS) cultivars. This research focused on a simple greenhouse screening procedure to replace large, costly, and laborious field screening. Non-GTS seed was determined to be susceptible to soaking in a 1% glyphosate solution for 4 h. This process is quicker, more efficient, and as reliable as field screening for determination of glyphosate susceptibility in soybean seed. Furthermore, this research clearly demonstrates that the metabolic pathway of glyphosate activity, the shikimate acid pathway, is active, and the target enzyme of glyphosate, 5-enol-pyruvyl-shikimate-3-phosphate synthase, is present during seed germination.

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A Novel Approach To Determine the Glyphosate Tolerant Trait in Soybeans

Main¹,

Pantalone²,

Mueller³

2004

J. Agric. Food Chem.

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Measurement of Inorganic Phosphorus in Soybeans with Near-Infrared Spectroscopy

Delwiche

Pordesimo

Scaboo

et al. 2006

J. Agric. Food Chem.

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This study explored the feasibility of near-infrared (NIR) quantitative and qualitative models for soybean inorganic phosphorus (Pi), which is complementary to phytic acid, a component of nutritional and environmental importance. Spectra, consisting of diffuse reflectance (1100-2500 nm) of ground meal and single-bean transmittance (600-1900 nm) of whole seed, were collected on 191 recombinant inbred soybean lines. Partial least-squares regression models were individually developed for soy meal diffuse reflectance, single-bean transmittance, and averaged (24 beans/line) whole seed transmittance data. The best performance was obtained with diffuse reflectance data, in which the standard errors (rmsd) were 263 and 248 mg/kg for cross-validation and validation sets, respectively. Model accuracy was lower for the 24-bean average transmittance spectra and still lower for single beans. Despite the overall poorer modeling ability of Pi with respect to the common macronutrient NIR regressions, such as those for protein and oil, this technique holds promise for use in breeding programs.

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Morphological Responses to Low Plant Population Differ Between Soybean Genotypes

Board

Kahlon

2013

Crop Science

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Because of increased seed costs for soybean [Glycine max (L.) Merr.], minimizing plant population to a level that still optimizes yield (minimal optimal plant population) has become important. Because little is known about possible genotypic strategies addressing this problem, the objectives of this study were to (i) determine the relative accuracy of three putative selection criteria for genotypic differences in minimal optimal plant population and (ii) use the best criterion to identify cultivar differences within the southern U.S. public cultivar germplasm collection. Two studies to address these objectives were conducted near Baton Rouge, LA (30° N lat). The first study (in 2007 to 2008) involved eight cultivars grown at normal (198,000 plants ha−1) and sparse plant populations (10,000 plants ha−1). Cultivar potential for a low minimal optimal plant population was assessed by relative yield (%) in sparse vs. normal plant population. Normalized branch dry matter (BDM) per plant (BDM per days to R5) was the most accurate selection criterion for minimal optimal plant population. This criterion was then used in a second study to assess minimal optimal plant population differences among 41 cultivars. Wide differences in normalized BDM per plant occurred, ranging from 0.10 to 1.50 g per plant d−1. In conclusion, normalized BDM per plant is an accurate and efficient selection measure for minimal optimal plant population.

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Registration of ‘Catoosa’ Soybean

Cited by 3 publications

References 4 publications

A Novel Approach To Determine the Glyphosate Tolerant Trait in Soybeans

A Novel Approach To Determine the Glyphosate Tolerant Trait in Soybeans

Measurement of Inorganic Phosphorus in Soybeans with Near-Infrared Spectroscopy

Morphological Responses to Low Plant Population Differ Between Soybean Genotypes

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