%0 Journal Article
%T Adaptability and Phenotypic Stability of Resistance to Two Viral Diseases and Yield Traits in Cassava
%A Bernadetta Kimata
%A Emily Masinde
%A Festo Masisila
%A Rahim Menya
%A Dwasi Matondo
%A Midatharahally N. Maruthi
%A Geoffrey Mkamilo
%J American Journal of Plant Sciences
%P 679-705
%@ 2158-2750
%D 2021
%I Scientific Research Publishing
%R 10.4236/ajps.2021.124046
%X Cassava productivity is
hampered by pests and diseases including cassava<span style=\"font-family:;\" \"=\"\"><span style=\"font-family:Verdana;\"> mosaic
disease (CMD) and cassava brown streak disease (CBSD).</span><b> </b><span style=\"font-family:Verdana;\">The main ob</span><span style=\"font-family:Verdana;\">jective of this study was to identify stable
superior genotypes that combine</span><span style=\"font-family:Verdana;\"> dis</span><span style=\"font-family:Verdana;\">ease
resistance and high yield. Sixteen cassava genotypes were planted in a</span> <span style=\"font-family:Verdana;\">randomized complete block design with three
replications for six planting </span><span style=\"font-family:Verdana;\">seasons (years) at five sites in Tanzania.
The genotypes were assessed using the additive main effect and multiplicative
interaction (AMMI) analysis, and highly significant (</span></span><span style=\"font-family:Verdana;\">P </span><span style=\"font-family:Verdana;\">&lt; 0.001) effects of genotype, environment, and
genotype-</span><span style=\"font-family:;\" \"=\"\"><span style=\"font-family:Verdana;\">by-environment
(</span><i><span style=\"font-family:Verdana;\">G</span><sup><span style=\"font-family:Verdana;\">*</span></sup><span style=\"font-family:Verdana;\">E</span></i><span style=\"font-family:Verdana;\">) interactions were
observed for all traits studied. Per</span><span style=\"font-family:Verdana;\">cent sum
of squares (SS) due to environment (12.66% - 85.23%) was the</span><span style=\"font-family:Verdana;\"> highest
followed by </span><i><span style=\"font-family:Verdana;\">G</span><sup><span style=\"font-family:Verdana;\">*</span></sup><span style=\"font-family:Verdana;\">E</span></i><span style=\"font-family:Verdana;\"> (14.12% -
39.56%) for CMD foliar symptoms, root weight and dry matter. On the other hand,
% SS due to genotype (52.14% - 69.14%) </span><span><span style=\"font-family:Verdana;\">was
highest followed by </span><i><span style=\"font-family:Verdana;\">G</span><sup><span style=\"font-family:Verdana;\">*</span></sup><span style=\"font-family:Verdana;\">E</span></i><span style=\"font-family:Verdana;\"> (26.14% - 35.91%) for CBSD foliar and root</span></span><span style=\"font-family:Verdana;\"> symptoms indicating that the
environment and </span><i><span style=\"font-family:Verdana;\">G</span><sup><span style=\"font-family:Verdana;\">*</span></sup><span style=\"font-family:Verdana;\">E</span></i><span style=\"font-family:Verdana;\"> greatly influenced trait expression. The most stable genotypes which
%K Cassava Brown Streak Disease
%K Cassava Mosaic Disease
%K Disease Resistance
%K Genotype*Environment Interaction
%K High Yield
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=108845