TISCHNER, TATE*, LOREEN ALLPHIN, KEVIN CHASE †, JIM ORF ‡, AND KARL G. LARK †. *Department of Botany and Range Science, Brigham Young University, Provo, UT 84602, †Department of Biology, University of Utah, Salt Lake City, UT 84112, ‡Department of Agronomy and Plant Science, University of Minnesota, St. Paul, MN 55108. - Genetics of seed abortion and reproductive traits in soybean, Glycine max (L.) Merr., II.
Based on the results given in a previous abstract, a more extensive
study was performed to assess the genetic basis of seed abortion and
reproduction in soybean. For this study, reproductive data were
obtained from two replications of three different RI populations
derived from the three parents Minosy, Noir 1 and Archer grown under
typical agronomic conditions. This study surveyed a more extensive
list of reproductive parameters (number of nodes per plant, nodal
length, number of fruits per node, nodal position of fruits, number of
fruits/plant, number of ovules per pod, number of filled seeds per
pod, seed/ovule, and developmental stage and position of abortions).
In addition, a variety of agronomic traits (seed number, seed weight,
total yield, leaf shape, oil content of seeds, number of flowers per
plant, protein content of seed, etc.) were measured in the same
experiment. All reproductive and agronomic traits were compared with
three existing genetic linkage maps of genotypes from these RI
populations. Quantitative trait loci (QTLs) responsible for the
variation in reproductive traits were identified and also analyzed for
interactions with other QTLs. These results were compared with data
(given in previous abstract) obtained from different environmental
conditions (Utah vs. Minnesota).
Key words: Glycine max, QTL, reproduction, seed abortion, seed/ovule, soybean