Posts Tagged ‘drought’

Street theater amplifies need for stress tolerant maize varieties

Posted on Media&Stories, News, News Articles, West Africa News, West Africa Publications, January 7, 2020

The Stress Tolerant Maize in Africa (STMA) project team in Nigeria used street theater to drum up messages on how to mitigate stresses affecting maize production in the country. The messages targeted mainly the youth, informing them that with the right stress-resilient seed varieties and the application of recommended agronomic practices, they can turn farming into a lucrative and livelihood improving enterprise. The messages were developed by the STMA team in collaboration with the Adopted Village Project of the National Agricultural Extension and Research Liaison Services (NAERLS), the Nigerian Forum for Agricultural Advisory Services (NIFAAS) and the Theatre and Performing Arts Department of Ahmadu Bello University, Zaria.

Local artistes in Nigeria perform songs, dance and drama at different markets and streets to create awareness on the benefits of adopting stress resilient maize seed varieties.

Local troupes displayed their skills in song, dance and drama to relay messages on the need for youth to venture into climate-smart agriculture to overcome challenges of drought, current and emerging pests and diseases, as well as improve their yield.

The artistes amplified the benefits of adopting stress resilient maize seed varieties.

Seven such performances were enacted at various markets and streets in Nigeria between August and November 2019. The theme of the street performance was, “Smart people, smart farming”. Since 2017, the STMA team has effectively used this unique campaign method to mobilize communities in rural areas to take adopt stress tolerant maize seed varieties for improved yields and livelihoods.

The list of STMA-supported research publications from West Africa for the year 2019 is out

Posted on News, Press room, Published Journals, Research News, Seed System Publication, West Africa News, West Africa Publications, November 30, 2019

Melaku Gedil and Abebe Menkir. 2019. An Integrated Molecular and Conventional Breeding Scheme for Enhancing Genetic Gain in Maize in Africa. Published in Frontiers. Plant Sciences and accessible here

Adu, G. B., Badu-Apraku, B., Akromah, R., Garcia-Oliveira, A. L., Gedil, M., Awuku, F. J. 2019. Genetic diversity and population structure of early-maturing tropical maize inbred lines using SNP markers, published  in PloS ONE, volume 14, number 4 and accessible here  

Badu-Apraku, B., Talabi, A. O., Fakorede, M., Fasanmade, Y., Gedil, M., Magorokosho, C., Asiedu, R. 2019. Yield gains and associated changes in an early yellow bi-parental maize population following genomic selection for Striga resistance and drought tolerance, published in BMC Plant Biology, volume 19, number 129, and accessible here.

Bankole, F., Menkir, A., Olaoye , G.*, Olakojo, O.*, Gedil, M. 2019. Association studies between grain yield and agronomic traits of a MARS maize (Zea mays L.) population under drought and non-stress condition, published in Acta Agriculturae Slovenica, volume 114, and accessible here.

Kammo, E. Q., Suh, C., Mbong, G. A., Djomo, S. H., Chimi, N. L. L., Mbeungang, D. L., Mafouasson, H. A., Meseka, S. K. and Menkir, A. 2019. Biological versus chemical control of fall armyworm and Lepidoptera stem borers of maize (Zea mays), published in Agronomie Africaine, volume 31, number 2, and accessible here.

Kolawole, A. O., Menkir, A., Blay, E., Ofori, K. and Kling, J. G., 2019. Changes in heterosis of maize (Zea mays L.) varietal cross hybrids after four cycles of reciprocal recurrent selection, published in Cereal Research Communications, volume 47, number 1, and accessible here .

Sangare, A., Menkir, A., Ofori, K. and Gracen, V., 2019. Studies on estimation of heterosis for striga resistance in maize test crosses in Mali, published in Journal of Genetics, Genomics & Plant Breeding, volume 3, number 3, and accessible here

Akaogu, I. C., Badu-Apraku, B., Tongoona, P., Ceballos, H., Gracen, V. E., Offei, S. and Dzidzienyo, D. 2019. Inheritance of Striga hermonthica adaptive traits in an early-maturing white maize inbred line containing resistance genes from Zea diploperennis. published in Plant Breeding, and accessible here  

Annor, B., Badu-Apraku, B., Nyadanu, D., Akromah, R. and Fakorede, M. 2019. Testcross performance and combining ability of early maturing maize inbreds under multiple-stress environments, published in NATURE Scientific Reports, volume 9, and accessible here .

Nelimor, C., Badu-Apraku, B., Nguetta, S. P., Tetteh, A. Y. and Garcia-Oliveira, A. L. 2019. Phenotypic characterization of maize landraces from Sahel and Coastal west Africa reveals marked diversity and potential for genetic improvement, published in Journal of Crop Improvement, and accessible here .

Obeng-Bio, E., Badu-Apraku, B., Ifie, B. E., Danquah, A., Blay, E. and Annor, B. 2019. Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments,  published in The Journal of Agricultural Science, and accessible here.

Nelimor, C., Badu-Apraku, B., Tetteh, A. Y.* and Nguetta, A. S. 2019. Assessment of genetic diversity for drought, heat and combined drought and heat stress tolerance in early maturing maize landraces, published in Plants, volume 8, and accessible here.

Badu-Apraku, B., Fakorede, M., Talabi, A. O., Oyekunle, M., Aderounmu, M., Lum, A. F., Ribeiro, P. F., Adu, G. B. and Toyinbo, J. O. 2019. Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments, published in Crop Science, and accessible here.  

Badu-Apraku, B. and Akinwale, R. O. 2019. Biplot analysis of line X tester data of maize (Zea mays L.) inbred lines under stress and nonstress environments. Published in Cereal Research Communications, volume 47, number 3, and accessible here.

Oyinbo, O., Mbavai, J. J., Shitu, M. B., Kamara, A., Abdoulaye, T. and Ugbabe, O. O. 2019. Sustaining the beneficial effects of maize production in Nigeria: does adoption of short season maize varieties matter?  Published in Experimental Agriculture, and accessible here  

Kadjo, D., Ricker-Gilbert, J., Shively, G. and Abdoulaye, T. 2019. Food safety and adverse selection in rural maize markets. Published in Journal of Agricultural Economics, and accessible here .

Assfaw Wossen, T., Alene, A., Abdoulaye, T., Feleke, S. and Manyong, V. 2019. Agricultural technology adoption and household welfare: measurement and evidence, published in Food Policy, and accessible here  

Assessment of genetic diversity for drought, heat and combined drought and heat stress tolerance in early maturing maize landraces

Posted on , November 30, 2019

Climate change is expected to aggravate the effects of drought, heat and combined drought and heat stresses. An important step in developing ‘climate smart’ maize varieties is to identify germplasmwithgoodlevelsoftolerancetotheabioticstresses. Theprimaryobjectiveofthisstudywas toidentifylandraceswithcombinedhighyieldpotentialanddesirablesecondarytraitsunderdrought, heat and combined drought and heat stresses. Thirty-three landraces from Burkina Faso (6), Ghana (6) and Togo (21), and three drought-tolerant populations/varieties from the Maize Improvement Program at the International Institute of Tropical Agriculture were evaluated under three conditions, namely managed drought stress, heat stress and combined drought and heat stress, with optimal growing conditions as control, for two years. The phenotypic and genetic correlations between grain yield of the different treatments were very weak, suggesting the presence of independent genetic control of yield to these stresses. However, grain yield under heat and combined drought and heat stresses were highly and positively correlated, indicating that heat-tolerant genotypes would most likely tolerate combined drought and stress. Yield reduction averaged 46% under managed drought stress, 55% under heat stress, and 66% under combined drought and heat stress, which reflected hypo-additive effect of drought and heat stress on grain yield of the maize accessions. Accession GH-3505 was highly tolerant to drought, while GH-4859 and TZm-1353 were tolerant to the three stresses. These landrace accessions can be invaluable sources of genes/alleles for breeding for adaptation of maize to climate change.

Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments

Posted on , November 30, 2019

Early-maturing provitamin A (PVA) quality protein maize (QPM) hybrids with combined drought and low soil nitrogen (low-N) tolerance are needed to address malnutrition and food security problems in sub-Saharan Africa (SSA). The current study’s objectives were to (i) examine combining ability of selected early maturing PVA-QPM inbreds for grain yield and other agronomic traits under drought, low-N, optimal environments and across environments, (ii) determine gene action conditioning PVA accumulation under optimal environments, (iii) classify inbreds into heterotic groups and identify testers and (iv) assess yield and stability of hybrids across environments. Ninety-six hybrids generated from 24 inbred lines using the North Carolina Design II together with four commercial hybrid controls were evaluated under drought, low-N and optimal environments in Nigeria in 2016 and 2017. Fifty-four selected hybrids were assayed for PVA carotenoid and tryptophan content. Additive genetic effects were greater than non-additive effects for grain yield and most agronomic traits under each and across environments. The gene action conditioning accumulation of PVA carotenoids under optimal growing conditions followed a pattern similar to that of grain yield and other yield-related traits. The inbred lines were categorized into four heterotic groups consistent with the pedigree records and with TZEIORQ 29 identified as the best male and female tester for heterotic group IV. No tester was found for the other groups. Hybrid TZEIORQ 24 × TZEIORQ 41 was the highest yielding and most stable across environments and should be further tested for consistent performance for commercialization in SSA.

Association studies between grain yield and agronomic traits of a MARS maize (Zea mays L.) population under drought and non-stress condition

Posted on , November 30, 2019

The study aimed at examining the associations between yield and other traits under drought stress and non-stress conditions. A total of 150 MARS testcrosses were evaluated under both conditions at the International Institute of Tropical Agriculture substation for two years under during the dry season. Genotypic and phenotypic correlation, multiple stepwise regression and path co-efficient analyses were carried out to examine the relationship among the traits under both environments. Results showed anthesis-silking interval, days to silking, husk cover and plant aspect were significantly associated with yield under drought condition at both genotypic and phenotypic levels. Yield was positively correlated with plant and ear height but had a negative correlation with plant and ear aspect at both levels under well-watered condition. Regression analysis showed that ears per plant, plant aspect, ear aspect, days to silking, leaf death and plant height had a direct effect on yield, contributing a total of 71.1 % of observed variation under drought, while ears per plant, ear aspect, plant aspect, days to pollen shed, days to silking and plant height contributed about 31.42 % to yield under wellwatered conditions. The study concluded that these traits be used as selection criteria as it will aid improvement of maize yield.

Key words: maize; association; grain yield; drought; well-watered; MARS; testcross

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