TITLE:
Yield Stability and Adaptability of Elite Doubled Haploid (DH) Rice Genotypes in Different Locations in Central Clay Plains of the Sudan
AUTHORS:
Khalid A. Osman, Sara M. Abdalla, Amir I. Ismail, Sang-Bok Lee, Ahmed E. Mohamed, Soheap A. Yousif, Yassir M. Ahmed
KEYWORDS:
Stability, Adaptability, Doubled Haploid (DH), AMMI
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.13 No.9,
September
26,
2022
ABSTRACT: Stability analysis of grain
yield is an efficient tool for the selection of varieties adapted to fairly
wide cultivation zone. A study aims to determine adaptability and stability for grain yield and agronomic
performance of 10 elite Doubled Haploid (DH) rice genotypes generated through anther culture
technique, along with local cultivar Umgar as a check under irrigated lowland
conditions in three different environments in the central clay plains of the
Sudan; during two cropping seasons 2019 and 2020. The trials were conducted in
a randomized complete block design with three replications. Grain yield
stability was studied, using the Additive
Main effect and Multiplicative Interaction (AMMI) model. Bi-plots were
developed following GGE bi-plot methodology over the six environments. The combined analysis of variance revealed significant to
highly significant (P MI indicated significant genotypes,
environments, and GE interaction with a total variation of 43.16%,
44.26% and 12.58% respectively. A biplot-AMMI analysis and yield stability
index incorporating the AMMI stability value and yield in a single non-parametric index were used to identify the
genotypes with the highest and stable yield. The overall mean for grain
yield was 5.69 t/ha, with a range of 5.77 to 4.12 t/ha. The
genotypes k150147,
k150870, k150032, k150912, and k150307 out yielded the local check Umgar by 40%,
38%, 34%, 34% and 33% respectively. The most genotypes were
mid-early maturities which were harvested at 107, 113, 108, 109 and 112 days
after sowing, respectively. These five genotypes also showed grain yield
stability along with their high mean yield performance according to the AMMI
analysis and widely adaptable to the tested locations. Therefore, the five out
yielding genotypes will be considered for cultivation under irrigated system
condition in central clay in the Sudan.