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- 저자 : Dadzie Abu Mustapha (검색결과 2 건)
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Stability analysis of yield and aflatoxin accumulation resistance in maize using GGE biplot
Oppong Allen,Dadzie Abu Mustapha,Ifie Beatrice Elohor,Asante Maxwell D.,Prempeh Ruth N. A.,Abrokwah Linda A.,Kubi Zipporah Appiah,Marfo Esther A. 한국작물학회 2023 Journal of crop science and biotechnology Vol.26 No.2
Maize (Zea mays L.) is the most important cereal crop in sub-Saharan Africa. However, its production is constrained by many factors including low yields and afatoxin contamination. Host resistance to afatoxin accumulation and productive hybrid varieties are seen as key approaches in addressing these challenges. Sixteen afatoxin-resistant inbreds obtained from Corn Host Plant Resistance Research Unit (CHPRRU), USDA ARS in Mississippi, USA, CIMMYT, IITA, etc., were crossed as males to six locally adapted inbreds in a North Carolina II design to generate 160 new hybrids and planted together with 9 checks using 13×13 lattice with three replications. The new hybrids were evaluated across six environments. Thirty-one of the most promising hybrids were subjected to the GGE biplot analysis to determine their stability for yield and afatoxin accumulation resistance. Genotype, G10 (ENTRY-5×Tzi8, G20 (TZEE-15×CML343, G28 (TZEEI-6×CML247 and G26 (TZEEI-6×CML11 were highly stable hybrids for yield while G08 (ENTRY-5×Ki3, G11 (ENTRY-85×CML247 and G19 (TZEEI-15×MP715 were relatively stable for afatoxin accumulation resistance. This means that it is possible to produce high-yielding afatoxin-resistant hybrids for consumers in the trial agro-ecologies.
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Akpertey Abraham,Anim-Kwapong Esther,Adu-Gyamfi Paul Kwasi Krah,Dadzie Abu Mustapha,Nyadanu Daniel,Ofori Atta 한국작물학회 2023 Journal of crop science and biotechnology Vol.26 No.2
Agronomic performance of Robusta cofee (Cofea canephora) is afected by genotype by environment interaction, which demands multi-environment testing of genotypes to identify superior genotypes. The objectives of this study were to (1) estimate genetic parameters and analyze the efects of genotype (G), environment (E), and genotype by environment (G×E) interaction on growth and yield traits of C. canephora genotypes, (2) identify superior genotypes that exhibit high stability by combining high growth and yield with broad or specifc environmental adaptation, and (3) identify environments that best represent the target environment for high trait expression. Thirty-nine C. canephora hybrids were evaluated using a randomized-complete-block design with three replications at New Tafo-Akim and Bechem in the Eastern and Ahafo regions of Ghana, respectively. Additive main efect and multiplicative interaction (AMMI) analysis of variance revealed highly signifcant (p<0.001) diferences among G, E, and G×E interaction efects for all traits. AMMI2 biplot analysis revealed the presence of 3, 2, 3, 2, and 3 mega environments for trunk cross-sectional area, height, span, number of laterals, and yield, respectively. Identifying mega environments for these traits will help expedite Robusta cofee breeding through the reduction of the number of test environments needed for phenotype evaluations. The AMMI analyses indicated genotypes G17 (E138×C180), G35 (PA193×C180), G4 (197×PA413), G1 (149×C193) and G30 (E152×149) have high and stable yields across all test environments. The promising candidate genotypes are recommended for further stability tests and release in Ghana or comparable environments.
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