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Genetic effects of the soft starch ( h ) and background loci on volume of starch granules in five inbreds of maize
Author(s) -
Wilson J. A.,
Glover D. V.,
Nyquist W. E.
Publication year - 2000
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1046/j.1439-0523.2000.00479.x
Subject(s) - starch , biology , locus (genetics) , particle size , volume (thermodynamics) , inbred strain , food science , genetics , gene , paleontology , physics , quantum mechanics
Larger particle volume is beneficial for many aspects of maize starch processing, and may improve the performance of some starch attributes. This study focused on the soft starch ( h ) locus to identify its potentially influential role in starch particle volume distribution. The objectives were to study the genetic expression of starch particle volume of the h locus in different genetic backgrounds and the gene action conditioning starch particle volume of other loci in both normal‐starch and h ‐starch backgrounds. Forty‐five populations (five intra‐inbred F 1s , 10 hybrid F 1s 10 F 2s , 10 BC 1 F 1s to h/h parent, and 10 BC 1 to h:h conversion of normal parent) were planted in 1993 at two locations and in 1995 at one location. Selfed heterozygotes (±/ h ) in all generations provided intra‐ear comparisons of normal and h starch, and F 3 and BC 1 F 2 generations provided inter‐ear comparisons. Significant differences were found between normal and h:h genotypes in all intra‐ear and inter‐ear comparisons. In all cases, general combining ability effects were highly significant, suggesting the presence of additive gene effects. Generation mean analysis of normal and h:h starch materials yielded similar results, indicating the predominance of additive and some dominance effects for other loci on starch particle volume. These results indicate the usefulness of the soft starch gene and additional genetic variation among inbreds in the improvement of starch particle volume for increased starch recovery in wet milling.