Multi-Environmental Evaluation of Protein Content and Yield Stability among Tropical Soybean Genotypes Using GGE Biplot Analysis
Loading...
Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Agronomy
Abstract
The yield and protein performance in a soybean genotype result from its interaction with
the prevailing environmental conditions. This makes selecting the best genotypes under varied target
production environments more complex. This study’s objectives were to determine protein content
and protein stability of 30 elite soybean genotypes in major soybean-growing areas of Uganda, assess
the yield performance and stability in soybeans and determine the relationship between the protein
content and grain yield in soybeans. The genotypes were planted in a randomized complete block
design of three replications for six seasons across eight locations in Uganda. Genotype and genotypeby-
environment (GGE) biplot analyses classified the test locations into three mega-environments for
soybean protein and grain yields. Genotype NII X GC 20.3 had the highest mean protein content of
43.0%, and BSPS 48A-9-2 and BSPS 48A-28 were superior for the mean grain yield (1207 kg ha1).
Bulindi was the most discriminating and representative test environment for soybean yield. A weak
and negative correlation (r = 0.1**, d.f. = 29) was detected between the protein content (%) and
yield (kg ha1). The highest-yielding genotypes BSPS 48A-9-2, BSPS 48A-31, and Nam II GC 44.2
are recommended for further evaluation under farmers’ production conditions for selection and
release as new soybean varieties in Uganda.
Description
Keywords
Biplot, GEI, GGE biplots, Yield stability, Protein stability
Citation
Obua, T.; Sserumaga, J.P.; Awio, B.; Nganga, F.; Odong, T.L.; Tukamuhabwa, P.; Tusiime, G.; Mukasa, S.B.; Nabasirye, M. Multi-Environmental Evaluation of Protein Content and Yield Stability among Tropical Soybean Genotypes Using GGE Biplot Analysis. Agronomy 2021, 11, 1265. https:// doi.org/10.3390/agronomy11071265