Sweet-potato (
Ipomoea batatas
[L.] Lam.) is the 3
rd most important root and tuber plant in the world, after potatoes and
cassava. The knowledge of the structure of Genotype × Environment interaction (GEI) could assist in the development of
cultivars of sweet-potato. The objective of this research was to select superior sweet-potato genotypes in Indonesia based
on Finlay-Wilkinson regression, additive main effect and multiplicative interaction (AMMI) analysis, AMMI stability
value (ASV), and Genotype plus Genotype × Environment (GGE) biplot methods. Genetic materials evaluated in this
research were 10 Indonesian superior genotypes developed by the Plant Breeding and Seed Technology Lab., Faculty
of Agriculture, University of Padjadjaran, Bandung. The research was arranged in randomized block design, with 16
genotypes as treatments. Data analysis of the yield characters was performed by using combined variance analysis:
Finlay-Wilkinson regression, ASV, AMMI, and GGE Biplot. The GEI significantly influenced the tested genotypes at
three sites. However, they did not show any significant differences in the GEI. Ayamurasaki, Beniazuma, Awachy2,
15(112), Awachy4, Awachy5, 80(109), 54(160), 35(180) were specific adaptation genotypes of marginal land based on
Finlay-Wilkinson analysis; whereas, Rancing, AC Putih, Ayamurasaki, Naruto Kinotoki, Awachy1, Awachy2, 15(112),
Awachy4, 57(97), 80(109), 54(160), 68(120) and 35(180) performed as stable genotypes based on ASV. Ayamurasaki,
Naruto Kinotoki, Awachy1, Awachy2, 57(97), 80(109) and 68(120) were stable genotypes based on AMMI analysis.
However, based on GGE Biplot analysis Ayamurasaki, Awachy1, 80 (109) and 68 (120) were stable genotypes. ASV
analysis provided effective stable genotype selections of 87.50% greater than other stability methods. Ayamurasaki,
Awachy1, 80(109) and 68(120) were stable genotypes based on AMMI, ASV, and GGE biplot analysis.
