A Calculated Approach to Breeding Low Phytate Soybean for Improved Germination and Emergence
2013 Annual Report
1a.Objectives (from AD-416):
We propose to develop, characterize, and advance breeding populations created to improve germination and emergence in low phytate soybeans, using two sources of the low phytate trait, CX1834-derived lines and Mips1 mutants.
1b.Approach (from AD-416):
We will develop breeding methodologies for LP (low phytate) germplasm in tandem with strategic handling of LP breeding populations for selection of improved G&E. Genetic improvement of G&E in LP germplasm should be possible through development of effective breeding methodologies, germplasm characterization, and selection of appropriate parents.
This project is related to Objective 2 of the in-house project: To discover novel genes/alleles in soybean for seed composition, determine their inheritance, determine genomic location, transfer to adapted germplasm, and release. Low phytate lines with CX1834-derived genes (484) and the Mips-derived gene (241) were planted in 743 single rows in the 2012 field season at Kentland Farm (Blacksburg, VA). Field notes (such as flower color and general field performance rating for each pop) were taken and based on field performance, the best rows from each population were selected. Five individual plants were harvested from each row. A total of 640 individual plants were harvested and threshed from the 19 populations.