Identification of novel maturity-related QTLs in a G.max/G.soja RIL population
Simon Lackey, Elroy Cober, Andrew Bird, Ashkan Golshani, Bahram Samanfar: Identification of novel maturity-related QTLs in a G.max/G.soja RIL population. Canadian Society of Plant Biologists(CSPB-SCBV), eastern meeting, 2021 Canada.
The soybean, Glycine max (L.) Merr., is one of the most economically important crops in Canadian agriculture. Canadian soybean breeders will need new sources of genes controlling early flowering and maturity to further contribute to the expansion of growing regions, particularly for Western provinces and Northern regions. The wild relative of the domesticated soybean, Glycine soja Sieb. & Zucc., has significantly more genetic diversity than G. max, and has the potential to provide novel alleles for short growing seasons that have not been explored or exploited. Studies investigating G.max/G.soja populations have previously identified QTLs related to seed weight, but the polygenic nature of seed weight requires further study. Identification and selection against seed dormancy related genes is essential before G. soja derived germplasm can be released. This study aims to identify novel quantitative trait loci related to time of flowering and maturity, seed weight, and seed dormancy in a G.max/G.soja recombinant inbred line population. Preliminary results suggest that lines from the population reach R7, beginning of maturity, around eleven days earlier than the domesticated parent (71 days instead of 82 days) and R8, full maturity, around ten days earlier than the domesticated parent (82 days instead of 92 days). Identification of the underlying genes and development of allele-specific markers for marker-assisted selection (MAS) will allow for an accelerated pipeline of cultivar development in short season soybean breeding programs and allow breeders to easily introgress these new sources of early maturity from G. soja.