Premium
Registration of Low Palmitic Acid Soybean Germplasm Lines N94‐2575 and C1943
Author(s) -
Burton J. W.,
Wilcox J. R.,
Wilson R. F.,
Novitzky W. P.,
Rebetzke G. J.
Publication year - 1998
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1998.0011183x003800050059x
Subject(s) - germplasm , citation , biology , library science , horticulture , computer science
Soybean [Glycine max (L.) Merr.] germplasm lines N94-2575 (Reg. no. GP-261, PI 602455) and C1943 (Reg. no. GP-262, PI 599811) were developed by the USDA-ARS (Raleigh, NC, and West Lafayette, IN) in cooperation with the North Carolina Agricultural Research Service and the Purdue University Agricultural Experiment Station and were released in July 1996 because of reduced concentration of palmitic acid in seed oil. Both lines have palmitic acid concentrations of approximately 40 g kg", which is 60 to 70 g kg" lower than soybean cultivars, and 20 g kg"' lower than other publicly released germplasm. Total saturated fatty acid (palmitic plus stearic acids) concentration in seed oil of the two germplasm lines is approximately 70 g kg". The two lines will be useful genetic resources for breeding low-saturated-fat soybean varieties. The germplasm N94-2575 is an F2.4 line from the cross (N902013 x C1726) sel. x N88-431 (2). N90-2013 was a low palmitic (60 g kg") line derived from a cross between PI 123440 andN792077-12. N79-2077-12 was a low palmitic selection from a recurrent selection population (1). C1726 was a low palmitic (80 g kg~') line developed by mutagenesis of the cultivar Century (2,3). N88-431 is a breeding line with good productivity, above-average protein content, and was selected from N84-1299 x N82-2037. The parentage of N82-2037 is N73-1102 x 330-26-294. N73-1102 is a selection from Tracy x Ransom (4,5). The paternal parent, 330-2629-4, is a selection from the third cycle of a recurrent selection population designated YC3 (6). N84-1299 is a selection from the first cycle of a recurrent selection population designated RS4 (7). N94-2575 was selected for release as germplasm because of its low palmitic and total saturated fatty acid concentrations in the seed oil. Averaged over 1993 to 1995 at Clayton, NC, seed oil of N942575 had a palmitic acid concentration of 39 g kg" and a total saturated fatty acid concentration of 66 g kg" (Table 1). Average total saturated fatty acid concentration of the cultivar Dare was 141 g kg". N94-2575 is late maturing (Maturity Group VII) and has very good seed quality. The germplasm C1943 is a Maturity Group III F4.6 line from the cross N79-2077-12 x C1726 (8). An F2 plant from this cross was identified that had 42 g kg" palmitic acid in the seed oil. The low palmitic acid concentration was confirmed in an F4.5 line progeny row derived from this plant and grown at West Lafayette, IN, in 1994. The F4:6 line was evaluated in a three-replicate test that included the cultivar Macon at West Lafayette in 1995. In this test, C1943 averaged 38 g kg" palmitic acid, compared with 102 g kg" for Macon (Table 2). C1943 matured at the same time and was similar in plant height and lodging resistance as Macon, but yielded less (2630 kg ha", compared with 3190 kg ha" for Table 2. Fatty acid concentration in seed oil of C1943 soybean and the check cultivar, Macon, grown at West Lafayette, IN.