Journal
CEREAL RESEARCH COMMUNICATIONS
Volume 45, Issue 2, Pages 336-345Publisher
AKADEMIAI KIADO ZRT
DOI: 10.1556/0806.44.2016.054
Keywords
AMMI stability value; genotype (x) environment interaction; grain yield; maize cultivars; multiple environments
Categories
Funding
- DTMA Project
Ask authors/readers for more resources
Genotype (x) environment interactions complicate selection of superior genotypes for narrow and wide adaptation. Eighteen tropically-adapted maize cultivars were evaluated at six locations in Nigeria for 2 yrs to (i) identify superior and stable cultivars across environments and (ii) assess relationships among test environments. Environment and genotype x environment interactions (GEI) were significant (P < 0 center dot 05) for grain yield. Environments accounted for 63.5% of the total variation in the sum of squares for grain yield, whereas the genotype accounted for 3.5% and GEI for 32.8%. Grain yield of the cultivars ranged from 2292 kg ha(-1) for DTSTR=W SYN2 to 2892 kg ha(-1) for TZL COMP4 C3 DT C2 with an average of 2555 kg ha(-1). Cultivar DT SYN2-Y had the least additive main effect and multiplicative interaction (AMMI) stability value of 7.4 and hence the most stable but low-yielding across environments. AMMI biplot explained 90.5% and classified cultivars and environments into four groups each. IWD C3 SYN F3 was identified as the high-yielding and stable cultivar across environments. ZA15, ZA14, BK14, BK15 and IL15 had environment mean above the grand mean, while BG14, BG15, LE14, LE15, IL14, LA14 and LA15 had mean below the grand mean. ZA, BK, BG, LE and LA were found to be consistent in ranking the maize cultivars. However, Zaria, Birnin Kudu, and Ilorin were identified as the best test locations and could be used for selecting the superior maize cultivars. The identified high-yielding and stable cultivar could be further tested and promoted for adoption to contribute to food insecurity in Nigeria.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available