Description:
R18-14147 was derived from the cross LG10-3671-1 × R09-430 (Plant Introduction (PI) 689004) made at A & J Seed Farms S.A., Upala, Costa Rica during the spring of 2016. The female parent, LG10-3671-1, is an indeterminate conventional breeding line with resistance to stem canker that was developed from the cross LG04-4866 × LG04-5377. LG04-4866 is a conventional breeding line developed at the Delta Branch Experiment Station and USDA-ARS, in Stoneville, MS that was derived from the cross LG97-9015 × ‘HS93-4118’ (PI 614155). LG04-5377 was also developed at the Delta Branch Experiment Station and USDA-ARS, in Stoneville, MS. It is a breeding line derived from the cross ‘Rend’ (PI 606748) × LG97-9301. The male parent, ‘R09-430’, is a determinate conventional soybean cultivar MG 5 (RM 5.1) developed and released in 2017 by the Arkansas Agricultural Experiment Station. R09-430 originated from the cross 'Syngenta BA 743303’ × R00-684. It is resistant to stem canker and frogeye leaf spot (caused by Cercospora sojina) and moderately resistant to southern root-knot nematode (caused by Meloidogyne incognita). BA 74330 is a conventional breeding line developed by Syngenta (Basel, Switzerland); R00-684 is a conventional breeding line developed by the Arkansas Agricultural Experiment Station and originated from the cross MD92-5769 × N90-541. The breeding population originating from the cross LG10-3671-1 × R09-430 was advanced from F1 to F3 in the same offseason nursery in Costa Rica. From F2 to F3, the segregating plant population was advanced using a modified single-pod descent method (Fehr, 1987). In Spring 2018, a total of 141 F3:4 single plant selections were harvested and threshed separately. In the 2018 cropping season, seeds from each plant were grown as non-replicated progeny rows (4-m long) in Stuttgart, AR. Rows were visually selected at maturity based on pod load, agronomic traits, uniformity, and overall yield potential. The progeny row number 14147 was selected, and seeds were bulked as a pure line for further evaluation of grain yield, seed composition, and various agronomic traits