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Genetic trends in CIMMYT’s tropical maize breeding pipelines

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Title Genetic trends in CIMMYT’s tropical maize breeding pipelines
 
Creator Prasanna, Boddupalli M.
Burgueño, Juan
Beyene, Yoseph
Makumbi, Dan
Asea, Godfrey
Woyengo, Vincent
Amsal Tesfaye Tarekegne
Magorokosho, Cosmos
Dagne Wegary Gissa
Thokozile Ndhlela
Zaman-Allah, Mainassara
Matova, Prince M.
Mwansa, Kabamba
Mashingaidze, Kingstone
Fato, Pedro
Chere, Adefris Teklewold
Vivek, Bindiganavile Sampath
Zaidi, Pervez H.
Vinayan, Madhumal Thayil
Patne, Nagesh
Rakshit, Sujay
Kumar, Ramesh
Jat, Shankar Lal
Singh, Shyam Bir
Kuchanur, Prakash H.
Lohithaswa, H. Chandappa
Singh, Narendra K.
Koirala, K. B.
Ahmed, Salahuddin
San Vicente, Felix M.
Dhliwayo, Thanda
Cairns, Jill E.
 
Subject genetics
plant sciences
maize
breeding
pipes
 
Description Fostering a culture of continuous improvement through regular monitoring of genetic trends in breeding pipelines is essential to improve efficiency and increase accountability. This is the first global study to estimate genetic trends across the International Maize and Wheat Improvement Center (CIMMYT) tropical maize breeding pipelines in eastern and southern Africa (ESA), South Asia, and Latin America over the past decade. Data from a total of 4152 advanced breeding trials and 34,813 entries, conducted at 1331 locations in 28 countries globally, were used for this study. Genetic trends for grain yield reached up to 138 kg ha−1 yr−1 in ESA, 118 kg ha−1 yr−1 South Asia and 143 kg ha−1 yr−1 in Latin America. Genetic trend was, in part, related to the extent of deployment of new breeding tools in each pipeline, strength of an extensive phenotyping network, and funding stability. Over the past decade, CIMMYT’s breeding pipelines have significantly evolved, incorporating new tools/technologies to increase selection accuracy and intensity, while reducing cycle time. The first pipeline, Eastern Africa Product Profile 1a (EA-PP1a), to implement marker-assisted forward-breeding for resistance to key diseases, coupled with rapid-cycle genomic selection for drought, recorded a genetic trend of 2.46% per year highlighting the potential for deploying new tools/technologies to increase genetic gain.
 
Date 2022-11-22
2023-01-19T17:00:00Z
2023-01-19T17:00:00Z
 
Type Journal Article
 
Identifier Prasanna, B.M., Burgueño, J., Beyene, Y., Makumbi, D., Asea, G., Woyengo, V., Tarekegne, A., Magorokosho, C., Wegary, D., Ndhlela, T., Zaman-Allah, M., Matova, P.M., Mwansa, K., Mashingaidze, K., Fato, P., Teklewold, A., Vivek, B.S., Zaidi, P.H., Vinayan, M.T., … Cairns, J. E. (2022). Genetic trends in CIMMYT’s tropical maize breeding pipelines. Scientific Reports, 12(1), 20110. https://hdl.handle.net/10883/22277
2045-2322
https://hdl.handle.net/10568/127592
https://hdl.handle.net/10883/22277
https://doi.org/10.1038/s41598-022-24536-4
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Publisher Nature Publishing Group
 
Source Scientific Reports