Work

Does growing latitude influence soybean seed critical amino acid content? A meta‐analysis

Year: 2025

Type: article

Study designs: Systematic Review, Meta-Analysis

Abstract: Soybean [ Glycine max (L.) Merr.] seed critical amino acid (CAA) content is a key quality factor for buyers worldwide, yet its spatial variability remains unclear. This study evaluated the correlation between growing latitude and CAA content in soybean seed using published data. Pearson's r values were extracted, converted to Fisher's Z as an effect‐size metric, and analyzed using a random‐effects model. Lysine, cystine, methionine, and tryptophan showed no significant correlations, while threonine exhibited a significant negative correlation with absolute latitude (Z = −0.50, p = 0.04). Subgroup analysis revealed additional significant correlations for lysine in soybean meal (Z = −0.74, p = 0.04) and for threonine (chemical methods to measure CAAs: Z = −0.58, p = 0.03; studies conducted outside the United States: Z = −0.78, p = 0.02). The absence of consistent correlations across multiple soybean‐growing regions worldwide suggests that latitude alone should not determine a buyer's purchasing decision regarding soybean CAA content.

Source: Agricultural & Environmental Letters

DOI: 10.1002/ael2.70033

Authors: Prabath Senanayaka Mudiyanselage, Laura E. Lindsey, Seun O. Oladipupo

Institution: The Ohio State University

Language: English

Topic: Soybean genetics and cultivation

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $1,900