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Registration of Soybean Germplasm Lines with Modified Fatty Acid Composition of Seed Oil
Author(s) -
Burton J. W.,
Wilson R. F.,
Brim C. A.,
Rinne R. W.
Publication year - 1989
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/cropsci1989.0011183x002900060081x
Subject(s) - germplasm , crop , biology , library science , horticulture , agronomy , computer science
Two soybean [Glycine max (L.) Merr.] lines, N85-2124 (MGV) (Reg. no. GP-114, PI 531519), and N85-2176 (MGIV) (Reg. no. GP-115, PI 531520) have been released because of their modified seed-oil quality. The seed oil of these lines has lower linolenic acid (3.3-4.0%) and higher oleic acid (32-44%) concentrations than most soybean cultivars currently available in the USA. (Table 1). Both are F5 lines from a cross between N78-2245 and PI 123440. N782245 is a line with high oleic acid concentration that was derived from the fifth cycle of a recurrent-selection experiment (1,2). Fatty acid composition of the two lines and their parents were evaluated with Tracy-M, a high oleic acid cultivar (E.E. Hartwig, 1981, personal communication) and N77-179, a standard type (Table 1). Investigation of the inheritance of fatty-acid composition in the plant population derived from this cross suggests that the low linolenic acid trait is controlled by recessive alleles at two major-genes loci, one pair contributed by N78-2245 and one pair contributed by PI 123440. Inheritance of higher oleic acid appears to be more complex. N85-2124 is of maturity group V with a determinate growth type, grey pubescence, purple flowers, and tan pods at maturity. Seed is yellow with buff hila. N8 5-2176 is of Maturity Group IV with an indeterminate growth type, tawny pubescence, white flowers, and tan pod wall at maturity. Seeds are yellow with brown or black hila. A sister line, N85-2131, of the above two was developed and released. It has seed-oil fatty-acid composition similar to N852124, but matures about 1 wk later. Seed yield of these lines has not been evaluated with improved cultivars of similar maturity. The germplasm lines were released by the USDA-ARS and the North Carolina Agricultural Research Service in 1987. Quantities of 50 seed of each line will be furnished on request from the Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7631.