2ds


The Galling and Yield of Soybean Cultivars and Breeding Lines
Grown in Meloidogyne incognita- and M. arenaria-infested soils.

Robert A. Kinloch
University of Florida MAR 2
West Florida Research and Education Center

Research Report 1999-)

During 1998, 76 soybean cultivars and breeding lines were grown at two sites separately
infested with the southern root-knot nematode, Meloidogyne incognita race 1, and the peanut
root-knot nematode, Meloidogyne arenaria race 2 at the West Florida Research and Education
Center, Santa Rosa County, FL. Soybean seed were provided by seed companies and public
breeding institutes.
Each test site was blocked according to the maturity groupings of the soybeans being
evaluated. There were 28 entries grouped in maturity groups IV-V (Table 1), 18 entries in VI
(Table 2), 17 entries in VII (Table 3), and 15 entries in VIII (Table 4). Cultivars Hutcheson and
Bryan were each included in two maturity group tests as maturity markers. Entries were
replicated X4 on three-row plots, 6.7 m long on 0.9 m centers in both tests which were planted on
7 July. Root-knot galling ratings were taken from four groups of approximately 5 plants from the
two border rows of each plot on 23 Sept. Each group was rated according to the scale of 0 = no
galling; 0.2 > 5%; 1 = 5 25%; 2 = 26 50%; 3 = 51 75%; 4 = < 75% of their root surface
galled. Yields were taken from the center rows of each plot. Maturity groups IV through VI were
harvested on 22 October and all remaining plots on 2 November.
In the tabulated data, soybean entries are listed in ascending order of their combined galling
scores to both M. incognita and M. arenaria. If it is considered that a galling score of 1.0 or less
indicates a good level of resistance, several soybeans in maturity groups IV-V would qualify as
resistant to M incognita, but only Northrup King X9857 RR appears to have a good level of
resistance to both root-knot nematodes. Similarly, Bryan would qualify in this regard in maturity
group VI. There are several entries in maturity group VII that indicate resistance to both
nematodes. These include Carver, Haskell, Northrup King S75-55, and three breeding lines from
the University of Georgia. Among entries in maturity group VIII, HyPerformer 798, Maxcy, and
a University of Florida breeding line displayed low galling responses to both nematodes.
The M. incognita test site suffered from considerable and continuous feeding by deer
Consequently, no reliance can be placed on the comparative yields reported from this site and they
cannot be accepted as typical for these soybeans grown in M incognita- infested soil. Yields in
the M arenaria-infested site were low, and in comparing yields and equivalent galling scores
there is indication that galling from M. arenaria is more destructive to yield than similar galling
levels from M. incognita.


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Table 1. Galling and yield of soybean cultivars and breeding lines grown in Meloidogyne incognita- and M. arenaria-
infested soils at the West Florida Research and Education Center, 1998. Maturity groups IV V.




Meloidogyne incognita Meloidogyne arenaria
Galling (0 4) Kg/ha Galling (0 4) Kg/ha Combined

Brand Cultivar 23 September 22 October 23 September 22 October galling

Northrup King X9857 RR 0.4 fg 1813 ab 0.6 f 999 a 1.0

Northrup King S57-11 0.3 g 1665 abc 1.3 def 962 ab 1.6

Hartz 5050 0.4 fg 1591 a-d 1.3 def 925 ab 1.7

Pioneer 9584 0.4 fg 1221 c-f 1.8 a-e 795 a-d 2.2

HyPerformer 574 0.4 fg 1535 a-e 1.8 a-e 906 ab 2.2

Terra-Riverside 520 1.3 d-g 1239 c-f 1.0 ef 758 a-e 2.3

Univ Florida F91-3076 0.8 efg 1073 d-g 1.7 b-f 499 c-g 2.5

Northrup King X9856 RR 1.2 d-g 1683 abc 1.4 c-f 999 a 2.6

Dyna-Gro 3576 0.8 efg 1073 d-g 1.9 a-e 721 a-e 2.7

Northrup King X9855 1.5 c-f 1332 b-f 1.5 c-f 888 ab 3.0

Dyna-Gro UAPX0038 RR 1.2 d-g 1424 a-f 1.9 a-e 666 a-f 3.1

Dyna-Gro 3463 RR 2.0 a-d 980 fg 1.2 def 666 a-f 3.2

Dyna-Gro 3495 2.1 a-d 1202 c-f 1.1 def 703 a-e 3.2

Terra-Riverside 490 2.0 a-d 1054 efg 1.2 def 870 ab 3.2

Public cultivar URK 5896 1.4 d-g 1387 a-f 2.0 a-e 425 efg 3.4

Pioneer 9594 1.3 d-g 1868 a 2.1 a-e 462 d-g 3.4

Public cultivar Hutcheson 1.3 d-g 1406 a-f 2.2 a-e 444 efg 3.5

Terra-Riverside 549 1.5 c-f 1239 c-f 2.2 a-e 869 ab 3.7

Terra-Riverside Robin-5 1.6 b-e 1591 a-d 2.2 a-e 629 b-f 3.8

Public cultivar Delsoy 5500 2.0 a-d 1128 d-g 2.1 a-e 832 abc 4.1

Delta Pine 5354 2.0 a-d 1017 efg 2.3 a-d 629 b-f 4.3

Delta King RR 5961 1.5 c-f 1091 d-g 3.0 a 444 efg 4.5

Public cultivar Clifford 2.0 a-d 1313 b-f 2.6 abc 684 a-e 4.6

Public cultivar Graham 2.6 abc 980 fg 2.3 a-d 444 efg 4.9

Delta King 5664 RR 2.1 a-d 1017 efg 2.8 ab 222 g 4.9

Terra-Riverside 77 2.9 a 1221 c-f 2.1 a-e 684 a-e 5.0

Univ Florida F94-1141 2.7 ab 629 g 2.3 a-d 333 fg 5.0

Public cultivar R93-171 2.8 a 906 fg 2.3 a-d 629 b-f 5.1
Data are averages of four observations.


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Averages followed by a similar letter within a column are not significantly different (P < 0.05)


Table 2. Galling and yield of soybean cultivars and breeding lines grown in Meloidogyne incognita- and M. arenaria-
infested soils at the West Florida Research and Education Center, 1998. Maturity group VI.



Meloidogyne incognita Meloidogyne arenaria
Galling (0 4) Kg/ha Galling (0 4) Kg/ha Combined

Brand Cultivar 23 September 22 October 23 September 22 October galling

Univ Georgia G92-1110 0.1 f 1831 a 1.2 de 962 a 1.3

Public cultivar Bryan 0.3 def 1498 a 1.0 e 666 a-d 1.3

Public cultivar Musen 0.2 ef 1979 a 1.4 cde 721 abc 1.6

SGA Boggs 0.3 def 1535 a 1.3 de 832 ab 1.6

Northrup King S65-50 0.4 def 1461 a 1.3 de 425 bed 1.7

Univ Georgia G92-2381 0.2 ef 1461 a 1.9 b-e 684 a-d 2.1

Pioneer 9692 1.6 a-e 1350 a 1.3 de 703 abc 2.9

Public cultivar Hutcheson 1.1 b-f 1591 a 1.8 b-e 462 bcd 2.9

Public cultivar Dillon 0.6 c-f 1517 a 2.5 ab 296 cd 3.1

Delta Pine 3640 0.7 c-f 1776 a 2.6 ab 518 a-d 3.3

Hartz 6191 2.0 abc 1702 a 2.3 abc 593 a-d 4.3

Hartz 6255 1.6 a-e 795 a 2.7 ab 351 cd 4.3

HyPerformer 663 1.7 a-d 1461 a 2.7 ab 222 d 4.4

Public cultivar Young 1.7 a-d 1443 a 2.8 ab 481 bcd 4.5

Dyna-Gro 3682 2.6 a 999 a 2.2 a-d 259 cd 4.8

Public cultivar Brim 2.7 a 1665 a 2.4 ab 518 a-d 5.1

Terra-Riverside 678 3.0 a 1517 a 2.2 a-d 629 a-d 5.2

Public cultivar TN 6-90 2.5 ab 1202 a 3.1 a 407 bcd 5.6
Data are averages of four observations.
Averages followed by a similar letter within a column are not significantly different (P < 0.05)


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Table 3. Galling and yield of soybean cultivars and breeding lines grown in Meloidogyne incognita- and M. arenaria-
infested soils at the West Florida Research and Education Center, 1998. Maturity group VII.




Meloidogyne incognita Meloidogyne arenaria
Galling (0 -4) Kg/ha Galling (0- 4) Kg/ha Combined

Brand Cultivar 23 September 2 November 23 September 2 November galling

Univ Georgia HAS-342 0.3 d 1757 ab 0.6 c 888 abc 0.9

Univ Georgia HAS-1945 0.3 d 1813 ab 0.7 be 832 abc 1.0

Northrup King S75-55 0.3 d 1924 a 0.9 be 1239 a 1.2

Univ Georgia HAS-2906 0.5 cd 1591 ab 0.7 be 740 abc 1.2

Pubic cultivar Bryan 0.1 d 629 d 1.2 bc 721 bc 1.3

SGA Haskell 0.5 cd 1535 ab 0.9 be 962 ab 1.4

SGA Benning 0.5 cd 1702 ab 1.1 be 1036 ab 1.6

Pubic cultivar Carver 1.0 bed 1276 be 0.8 be 980 ab 1.8

Univ Florida F94-1604 0.6 cd 1572 ab 1.5 abc 1054 ab 2.1

Univ Florida F94-2199 0.9 bcd 1295 abc 1.4 be 1073 ab 2.3

Univ Georgia Ben-654 0.9 bed 1720 ab 1.6 ab 888 abc 2.5

AgriPro 727 0.3 d 1720 ab 2.3 a 629 be 2.6

Pubic cultivar Hagood 1.6 b 1591 ab 1.2 be 703 be 2.8

Univ Georgia G91-151 0.8 bed 1517 ab 2.3 a 795 abc 3.1

Univ Georgia Ben-1317 1.7 b 1535 ab 1.6 ab 777 abc 3.3

Pioneer 97B61 1.3 bc 1702 ab 2.3 a 610 bc 3.6

Public cultivar Stonewell 2.7 a 869 cd 2.3 a 444 c 5
Data are averages of four observations.
Averages followed by a similar letter within a column are not significantly different (P < 0.05)


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Table 4. Galling and yield of soybean cultivars and breeding lines grown in Meloidogyne incognita- and M arenaria-
infested soils at the West Florida Research and Education Center, 1998. Maturity group VIII.


Meloidogyne incognita

Galling (0 -4)

23 September 2

0.3 e

0.6 de

0.5 de

1.0 de

0.7 de

1.2 cde

0.8 de

1.4 bcd

1.2 cde

1.1 cde

1.4 bcd

0.8 de

2.3 ab

2.0 abc

2.8 a


Kg/ha

November

1757ab

1110 def

1887 a

1461 a-e

1406 a-e

1406 a-e

1683 abc

1442 a-e

610f

1517 a-d

1221 b-e

1572 a-d

943 ef

1128 c-f

925 ef


Meloidogyne arenaria

Galling (0 -4)

23 September 21

0.6 c

0.6 c

1.4 be

0.9 be

1.4 be

1.0 be

1.8 ab

1.3 be

1.6 abc

1.8 ab

1.9ab

2.7 a

1.7 abc

2.1 ab

2.0 ab


Kg/ha

November

1147 a

999 ab

999 ab

555 bcd

1017 ab

536 bed

703 a-d

703 a-d

203 d

684 a-d

610 a-d

351 ed

573 bed

777 abc


Combined

galling

0.9

1.2

1.9

1.9

2.1

2.2

2.6

2.7

2.8

2.9

3.3

3.5

4.0

1.4


Brand

HyPerformer

Univ Florida

Univ Georgia

Public cultivar

Public cultivar

Univ Georgia

Univ Georgia

Northrup King

Univ Florida

Public cultivar

Univ Georgia

Univ Georgia

Univ Georgia

Northrup King

Pioneer


Data are averages of four observations.
Averages followed by a similar letter within a column are not significantly different (P < 0.05)


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Cultivar

798

F91-2161

G92-2388

Maxcy

Motte

Cook 0350

G92-2167

S83-80

F94-2290

Cook

Prichard

G90-R1551E

Cook 1937

S80-J2

9831


314cd 4.8