Registration of ‘Obatanpa GH’ Maize

Badu‐Apraku, B.; Twumasi-Afriyie, S.; Sallah, P.Y.K.; Haag, W. L.; Asiedu, E.A.; Marfo, K.A.; Dapaah, S.; Dzah, B D

doi:10.2135/cropsci2005.11-0398

Cited by 13 publications

(9 citation statements)

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“…The resulting early yellow population was named TZE-Y Pop. Through the recurrent selection and inbred-hybrid development programs, several inbred lines, open-pollinated cultivars, and hybrids with tolerance to multiple stress have been generated from the reference population (Badu-Apraku et al, 2006, 2008. This was followed by two cycles of backcrossing to the population.…”

Section: Development Of the Source Population And The S 1 Recurrent Smentioning

confidence: 99%

“…Using this strategy, TZE-Y Pop DT STR has been remarkably improved through the S 1 recurrent selection program, aimed at concentrating beneficial genes in the breeding population. Through the recurrent selection and inbred-hybrid development programs, several inbred lines, open-pollinated cultivars, and hybrids with tolerance to multiple stress have been generated from the reference population (Badu-Apraku et al, 2006, 2008.…”

Section: Development Of the Source Population And The S 1 Recurrent Smentioning

confidence: 99%

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Genetic Variances and Heritabilities of Traits of an Early Yellow Maize Population after Cycles of Improvement for Striga Resistance and Drought Tolerance

et al. 2018

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Drought and Striga are principal constraints to maize (Zea mays L.) production in sub‐Saharan Africa. An early yellow maize population, TZE‐Y Pop DT STR, which had undergone five cycles of selection for resistance to Striga, followed by three cycles of improvement for drought tolerance, was investigated for yield gains, changes in genetic variance, and interrelationships among traits under drought stress and optimum environments. Two hundred and forty S1 lines comprising 60 each from the base population and subsequent populations from three selection cycles improved for grain yield and drought tolerance were assessed under drought and optimal environments in Nigeria from 2010 to 2012. Genetic improvements in grain yield of 423 and 518 kg ha−1 cycle−1 were achieved under drought stress and optimal environments. Predicted improvements in selection for yield were 348 and 377 kg ha−1 cycle−1 under drought stress and optimum environments, respectively. The highest yield observed in C3 was accompanied by reduced days to silking and anthesis–silking interval, improved plant aspect and ear aspect, and increased plant height and ears per plant across research environments, as well as improved stay‐green characteristic under drought. The level of genetic variability for yield and a few other traits were maintained under drought and optimal environments in the population. The presence of residual genetic variability for yield and other assayed traits in C3 indicated that progress could be made from future selection in the population depending on the ability of breeders to identify outstanding genotypes and the precision level of experimentation. Substantial improvement has been made in yield and drought tolerance in C3 of the population.

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Section: Development Of the Source Population And The S 1 Recurrent Smentioning

confidence: 99%

Section: Development Of the Source Population And The S 1 Recurrent Smentioning

confidence: 99%

Genetic Variances and Heritabilities of Traits of an Early Yellow Maize Population after Cycles of Improvement for Striga Resistance and Drought Tolerance

et al. 2018

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“…It is grown in highly heterogeneous environments and is consumed by people with varying food preferences and socio-economic backgrounds (Badu-Apraku et al, 2006). To meet these demands, maize breeders at the International Institute of Tropical Agriculture (IITA) work in partnership with national programmes in West Africa (WA) to develop maize varieties adapted to the different agroecological zones and farming systems of WCA.…”

Section: Introductionmentioning

confidence: 99%

Use of GGE biplot for targeting early maturing maize cultivars to mega-environments in West Africa

Badu‐Apraku¹,

Akinwale²,

Menkir³

et al. 2011

African Crop Science Journal

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Maize (Zea mays L.) is an important staple food consumed by people with varying food preferences and socioeconomic backgrounds in West Africa (WA). Genotype by environment interactions (G×E) exist in WA implying the need for extensive testing of cultivars in multiple environments over years before cultivar realistic recommendations can be made. This study examined the effect of G×E on the performance and stability of early cultivars and to identify core test locations in the mega-environments of WA. Across locations, 2004 TZE-W Pop STR C 4 produced the highest grain yield and was the most stable cultivar. DMR-ESRW QPM produced the lowest yield. The test environments contributed about 83.4% of the total variation in grain yield, while genotypes accounted for 1.5% and G × E, 11%. Test environments were classified into four mega-environments, namely, Katibougou, Sotouboua, Ejura, and Bagou as the first group; the second group consisted of Manga, Nyankpala, Bagauda, Yendi, Angaredebou, Mokwa, Katibougou, and Zaria; while the third group comprise of Ativeme, and Ikenne; and the fourth, Ina. Test locations Ejura, Sotouboua and Bagou and Katibougou were highly correlated in their ranking of the genotypes in group 1, suggesting that a promising early maturing cultivar selected in one of these locations in one country will also be suitable for production in the other locations within the same mega-environments in different countries. Kita was identified as the ideal location, while Zaria was close to the ideal location.Key Words: Genotypes, multiple environment, Zea mays RÉSUMÉLe maïs (Zea mays L.) est une nourriture principale consommé par des personnes à préférence alimentaires et un passé socio-économique variés en Afrique de l'Ouest. Une interaction Génotype et Environnement (G×E) était trouvée, impliquant ainsi le besoin en test extensive des cultivars sur plusieurs années avant toute recommandation. Le but de cette étude était d'examiner l'effet G×E sur la performance et la stabilité des cultivars précoces, ainsi que d'identifier le test principal de milieu dans les méga-environnements de l'Afrique de l'Ouest. A travers les milieux, 2004 TZE-W Pop STR C4 avait produit le rendement en grain le plus élevé et était le cultivar le plus stable. DMR-ESRW QPM avait induit le rendement le moins élevé. La contribution du test d'environnements était d'environ 83.4% de la variation totale du rendement en grain, pendant que les génotypes et G × E présentaient 1.5% et 11%, respectivement. Les tests d'environnements étaient classifiés en quatre méga-environnements à savoir, Katibougou, Sotouboua, Ejura, and Bagou comme premier groupe; Manga, Nyankpala, Bagauda, Yendi, Angaredebou, Mokwa, B. BADU-APRAKU et al. 80Katibougou, and Zaria comme deuxième groupe, alors que le troisième groupe comprenait Ativeme, et Ikenne et le quatrième, Ina. Le test de milieux Ejura, Sotouboua, Bagou et Katibougou étaitent hautement corrélé sur le plan ranking des génotypes au sein du groupe 1, suggérant qu'un cultivar précoce promettant sélec...

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“…The effort has paid off and several QPM cultivars in the early and extra‐early maturity groups have been developed with increased levels of lysine and tryptophan, competitive performance in yield trials, and improved resistance to drought, Striga , and diseases. Even though there are several reports indicating that certain QPM cultivars can be equal to the yields of conventional cultivars now under cultivation in developing countries and that several experimental cultivars performed better than the checks in several regions of the world (National Research Council, 1988; Badu‐Apraku et al, 2006), such reports are limited in WCA. There is a need to assess how the available QPM cultivars in the IITA maize program measure up to their normal counterparts, and to carry out extensive testing of the available QPM cultivars to promote their adoption by farmers in WCA.…”

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confidence: 99%

The Pattern of Grain Yield Response of Normal and Quality Protein Maize Cultivars in Stress and Nonstress Environments

Badu‐Apraku

Lum

2010

Agronomy Journal

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Registration of ‘Obatanpa GH’ Maize

Cited by 13 publications

References 1 publication

Genetic Variances and Heritabilities of Traits of an Early Yellow Maize Population after Cycles of Improvement for Striga Resistance and Drought Tolerance

Genetic Variances and Heritabilities of Traits of an Early Yellow Maize Population after Cycles of Improvement for Striga Resistance and Drought Tolerance

Use of GGE biplot for targeting early maturing maize cultivars to mega-environments in West Africa

The Pattern of Grain Yield Response of Normal and Quality Protein Maize Cultivars in Stress and Nonstress Environments

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