Decades of Yield Progress Maturity Groups V, VI, and

VIII

Roger Boerma & Abdel-Haleem Hussein

In cooperation with Southern Public Breeders/Monsanto/Pioneer/Syngenta

Previous MG V-VIII Studies

•  Boerma, 1979 (Crop Sci. 19:611-613) –  MG VI = 0.15 bu/a/yr –  MG VII = 0.27 bu/a/yr –  MG VIII = 0.22 bu/a/yr

•  Salado-Navarro, Sinclair, Hinson, 1993 (Crop Sci. 33:1204-1209) –  MG VI = no significant gain –  MG VII = 0.24 bu/a/yr –  MG VIII = 0.28 bu/a/yr

Maturity Group V Cultivars

Cultivars Decade Public Commerci

al Total

1935 - - - 1945 S100 - 1 1955 Dorman, Hill - 2 1965 Dare, York - 2 1975 Essex, Forrest 2 4 1985 Hutcheson 5 6 1995 Holladay, Clifford,

Graham 10 13

2005 5601T, Jake, Osage 7 10 Total 14 24 38

Carbondale, IL Jim Klein

Springfield, TN Vince Pantalone

Warsaw, VA Katy Rainey

Plymouth, NC Andrea Cardinal

Stoneville, MS Anne Gillen Copper, TX

Jim Heitholt

Pittsburg, KS Bill Schapaugh

Portageville, MO Grover Shannon

Total No. of tests : 8 locations No. of entries/test : 38 entries No. of rows/plot : 4 plots No. of replications : 3 replications Total No. of plots/test : 114 plots

Maturity Group V: Collaborators and Locations

y = 0.24x - 426.9 R² = 0.75

30.0

35.0

40.0

45.0

50.0

55.0

1940 1950 1960 1970 1980 1990 2000 2010

1945 - 2005

y = 0.17x - 304.3 R² = 0.37

30.0

35.0

40.0

45.0

50.0

55.0

1970 1975 1980 1985 1990 1995 2000 2005 2010

1975 - 2005

Yield vs. Year of Release Maturity Group V

bu/a bu/a

Commercial vs. Public (1975-2005) Maturity Group V bu/a

Maturity Group VI Cultivars

Soybean Cultivars Decade Public Commercia

l Total

1935 Arksoy - - 1945 Ogden - 1 1955 Lee, Hood - 2 1965 Davis, Pickett - 2 1975 Tracy, Centennial 2 4 1985 Young, Leflore 2 6 1995 Brim, Dillon, Boggs 6 13 2005 Musen, NC Roy 5 10 Total 15 15 30

Athens, GA Roger Boerma Kinston, NC

Tommy Carter

Plymouth, NC Andrea Cardinal

Stoneville, MS Anne Gillen

Perkins, OK Chad Godsey

Stuttgart, AR Pengyin Chen

Total No. of tests : 6 locations No. of entries/test : 30 entries No. of rows/plot : 4 plots No. of replications : 4 replications Total No. of plots/test : 120 plots

Maturity Group VI: Collaborators and Locations

1935 - 2005 1975 - 2005

y = 0.21x - 372.5 R² = 0.73

30.0

35.0

40.0

45.0

50.0

55.0

1930 1940 1950 1960 1970 1980 1990 2000 2010

y = 0.26x - 468.7 R² = 0.57

30.0

35.0

40.0

45.0

50.0

55.0

1970 1975 1980 1985 1990 1995 2000 2005 2010

Yield vs. Year of Release Maturity Group VI

bu/a bu/a

Commercial vs. Public (1975-2005) Maturity Group VI

bu/a

Maturity Group VII Cultivars

Soybean Cultivars Decade Public Commerci

al Total

1935 - - - 1945 CNS, Roanoke - 1 1955 Jackson - 2 1965 Bragg - 2 1975 Ransom, GaSoy17,

Braxton 1 4

1985 Thomas, Stonewall 3 6 1995 Hagood, Cook, Benning 3 13 2005 NC Raleigh, Woodruff,

N7002 5 10

Total 15 12 27

Athens, GA Roger Boerma

Kinston, NC Tommy Carter

Bossier City, LA Blair Buckley

Total No. of tests : 6 locations No. of entries/test : 27 entries No. of rows/plot : 4 plots No. of replications : 4 replications Total No. of plots/test : 108 plots

Maturity Group VII: Collaborators and Locations

Plains, GA Roger Boerma

Tallassee, AL David Weaver

Blackville, SC Emerson Shipe

1945 - 2005 1975 - 2005

Yield vs. Year of Release Maturity Group VII

y = 0.15x - 261.1 R² = 0.57

20.0

25.0

30.0

35.0

40.0

45.0

1940 1950 1960 1970 1980 1990 2000 2010

y = 0.15x - 261.1 R² = 0.39

20.0

25.0

30.0

35.0

40.0

45.0

1970 1975 1980 1985 1990 1995 2000 2005 2010

bu/a bu/a

Commercial vs. Public (1975-2005) Maturity Group VII bu/a

Summary •  Soybean breeders (public and commercial)

continue to make genetic gain in seed yield •  The rate of gain does not appear to have

increased in MG V, VI, and VIII since the enactment of Plant Variety Protection Act

•  Public-sector varieties were greater in seed yield in MG V and VII and commercial-sector varieties in MG VI, but public cultivars lack desired transgenic herbicide tolerance

•  We need a second year of data especially in MG VII