The normal content (80-90 g kg-1) of linolenic acid in soybean [Glycine max (L.) Merr.] oil adversely affects oil flavor and stability. A new mutant (M-24) with lower linolenic acid content (62 g kg-1) was developed by x-ray irradiation. Our objective was to determine the inheritance of linolenic acid content in M-24 and to determine the genetic relationships of this trait with the fan and fanx loci known to control linolenic acid in M-5 and KL-8 mutants, respectively. Reciprocal crosses were made between each mutant and 'Bay', and among the three mutants. No maternal or cytoplasmic effects were observed in any of the crosses. Data from F: seeds of the cross M-24 x Bay indicated that linolenic acid content in M-24 was controlled by an allele at a single locus with no dominance effects. In the cross of M-24 x KL-8, F2 segregation indicated that linolenic acid content in M-24 and KL-8 was controlled by two different alleles at the same locus. For the M-5 x M-24 cross, F2 segregation patterns and the segregation of F3 seeds from individual F2 plants indicated that M-5 and M-24 mutants have alleles at different independent loci that control linolenic acid content. Therefore, the allele in M-24 is designated as fanx (M-24) to distinguish it from those of fan (M-5) and fanx (KL-8). The segregate with the fanfanfanx'fanx' genotype can be considered as an important germplasm that can reduce the linolenic acid content in soybean oil.
|Number of pages||5|
|Publication status||Published - 1998|
All Science Journal Classification (ASJC) codes
- Agronomy and Crop Science