Fungicide management does not affect the rate of genetic gain in soybean

Nicholas H. Weidenbenner, Scott C. Rowntree, Eric W. Wilson, Justin J. Suhre, Shawn P. Conley, Shaun N. Casteel, Vince M. Davis, Brian W. Diers, Paul Esker, James E. Specht, Seth L. Naeve

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

On-farm U.S. soybean [Glycine max (L.) Merr.] yields have increased at an annual rate of 23.3 kg ha-1 yr-1 since the 1920s. These gains have come from a variety of sources including genetic, agronomic, and environmental changes. Genetic gains arising from breeding efforts have likely contributed the most to the U.S. soybean yield increase; however, the relative contribution of each source of gain is difficult to estimate. The objectives of this study were to compare yield of soybean varieties with different year of release, understand the effects of fungicide applications on soybean seed yield, and evaluate the composition of soybean cultivars chosen to represent historically significant releases in maturity groups (MGs) II and III released during the last 85 yr. A set of 116 cultivars in these two MGs, released from 1923 to 2008, received a fungicide seed treatment followed by foliar applications at R1, R3, and R5 and were compared to non-treated controls. Seed composition changed over time with protein concentration decreasing 2.1 g kg-1 for every g kg-1increase in oil concentration. The significant interaction between fungicide treatment and MG III cultivar release year for plant stand revealed that such treatments were more beneficial with respect to obsolete cultivars of MG III, though this plant stand interaction did not translate into a significant yield interaction. The rate of genetic yield improvement made by breeders was not influenced by fungicide management and matched the observed rate of on-farm yield improvement that occurred during the same period.

Original languageEnglish (US)
Pages (from-to)2043-2054
Number of pages12
JournalAgronomy Journal
Volume106
Issue number6
DOIs
StatePublished - Nov 1 2014

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genetic improvement
fungicides
maturity groups
soybeans
cultivars
farms
foliar application
seed treatment
pesticide application
seed yield
Glycine max
oils
breeding
seeds
proteins

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Weidenbenner, N. H., Rowntree, S. C., Wilson, E. W., Suhre, J. J., Conley, S. P., Casteel, S. N., ... Naeve, S. L. (2014). Fungicide management does not affect the rate of genetic gain in soybean. Agronomy Journal, 106(6), 2043-2054. https://doi.org/10.2134/agronj14.0195
Weidenbenner, Nicholas H. ; Rowntree, Scott C. ; Wilson, Eric W. ; Suhre, Justin J. ; Conley, Shawn P. ; Casteel, Shaun N. ; Davis, Vince M. ; Diers, Brian W. ; Esker, Paul ; Specht, James E. ; Naeve, Seth L. / Fungicide management does not affect the rate of genetic gain in soybean. In: Agronomy Journal. 2014 ; Vol. 106, No. 6. pp. 2043-2054.
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Weidenbenner, NH, Rowntree, SC, Wilson, EW, Suhre, JJ, Conley, SP, Casteel, SN, Davis, VM, Diers, BW, Esker, P, Specht, JE & Naeve, SL 2014, 'Fungicide management does not affect the rate of genetic gain in soybean', Agronomy Journal, vol. 106, no. 6, pp. 2043-2054. https://doi.org/10.2134/agronj14.0195

Fungicide management does not affect the rate of genetic gain in soybean. / Weidenbenner, Nicholas H.; Rowntree, Scott C.; Wilson, Eric W.; Suhre, Justin J.; Conley, Shawn P.; Casteel, Shaun N.; Davis, Vince M.; Diers, Brian W.; Esker, Paul; Specht, James E.; Naeve, Seth L.

In: Agronomy Journal, Vol. 106, No. 6, 01.11.2014, p. 2043-2054.

Research output: Contribution to journalArticle

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AU - Weidenbenner, Nicholas H.

AU - Rowntree, Scott C.

AU - Wilson, Eric W.

AU - Suhre, Justin J.

AU - Conley, Shawn P.

AU - Casteel, Shaun N.

AU - Davis, Vince M.

AU - Diers, Brian W.

AU - Esker, Paul

AU - Specht, James E.

AU - Naeve, Seth L.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - On-farm U.S. soybean [Glycine max (L.) Merr.] yields have increased at an annual rate of 23.3 kg ha-1 yr-1 since the 1920s. These gains have come from a variety of sources including genetic, agronomic, and environmental changes. Genetic gains arising from breeding efforts have likely contributed the most to the U.S. soybean yield increase; however, the relative contribution of each source of gain is difficult to estimate. The objectives of this study were to compare yield of soybean varieties with different year of release, understand the effects of fungicide applications on soybean seed yield, and evaluate the composition of soybean cultivars chosen to represent historically significant releases in maturity groups (MGs) II and III released during the last 85 yr. A set of 116 cultivars in these two MGs, released from 1923 to 2008, received a fungicide seed treatment followed by foliar applications at R1, R3, and R5 and were compared to non-treated controls. Seed composition changed over time with protein concentration decreasing 2.1 g kg-1 for every g kg-1increase in oil concentration. The significant interaction between fungicide treatment and MG III cultivar release year for plant stand revealed that such treatments were more beneficial with respect to obsolete cultivars of MG III, though this plant stand interaction did not translate into a significant yield interaction. The rate of genetic yield improvement made by breeders was not influenced by fungicide management and matched the observed rate of on-farm yield improvement that occurred during the same period.

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Weidenbenner NH, Rowntree SC, Wilson EW, Suhre JJ, Conley SP, Casteel SN et al. Fungicide management does not affect the rate of genetic gain in soybean. Agronomy Journal. 2014 Nov 1;106(6):2043-2054. https://doi.org/10.2134/agronj14.0195