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Evaluation of grain yield of heat stress resilient maize hybrids in Nepal

Author: Koirala, K.B.
Author: Giri, Y.P.
Author: Rijal, T.R.
Author: Zaidi, P.H.
Author: Ajanahalli, R.S.
Author: Shrestha, J.
Year: 2017
Abstract: Midhills, foot hills and river basin areas of are generally under spring maize cultivation. These areas along with the areas from Terai and Inner Terai where spring and early summer maize are grown are the most affected from heat stress. Identification and selection of suitable varieties and traits for high temperature tolerance is vital to produce heat resilient genotypes.With a view to identify high yielding heat stress resilient maize hybrids, genotypes received from International Maize and Wheat Improvement Centre (CIMMYT) were evaluated in alpha lattice design with two to three replications at Rampur, Nepalgunj and Surkhet in 2013/014, 2014/015 and 2015/016. Total 57 trials consisting of 7764 maize hyrbids were evaluated under heat stress conditions. At Nepalgunj and Surkhet, trials were planted in March/April. Out of the tested genotypes, 24 hybrids were found promising based on grain yield, plant and ear height. These 24 hybrids along with four National Maize Research Program (NMRP) developed and two multi-national companies’ hybrids as checks were tested in multilocation trials at Dumarwana, Nijgadh, Nawalparasi and Rampur in 2014/015. Out of these 24 hybrids, eight were selected and tested during 2015/016 in Dumarwana, Nijgadh, Nawalparasi, Anandapur and Rampur. Based on results combined over years and locations CAH-151 (8629 kg ha-1) and CAH-153 (8955 kg ha-1) were registered for general cultivation as Rampur Hybrid-8 and Rampur Hybrid-10, respectively. Other promising hybrids were CAH-1511 (8800 kg ha-1) followed by CAH-1515 (8678 kg ha-1), RML-95/RML-96 (8486 kg ha-1), CAH-1513 (8258 kg ha-1) and RML-86/RML-96 (7544 kg ha-1), respectively. Stability analysis revealed that CAH-151, CAH-153, CAH-1515, CAH-1511 and RML-95/RML-96 are stable hybrids having good performance.
Format: PDF
Language: English
Publisher: International Journal of Applied Sciences and Biotechnology
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Country focus: Nepal
Place of Publication: Nepal
Pages: 511-522
Issue: 4
Volume: 5
Project: FP3 - Stress resilient and nutritious maize
DOI: 10.3126/ijasbt.v5i4.18774
Keywords: Maize Hybrid
Keywords: Heat Resilient
CRP: Maize
Country of Focus: TERAI
Country of Focus: INNER TERAI
Country of Focus: RAMPUR
Country of Focus: NAPALGUNJ
Country of Focus: SURKHET
Country of Focus: DUMARWANA
Country of Focus: NIJGADH
Country of Focus: NAWALPARASI
Country of Focus: ANANDAPUR
Agrovoc: MAIZE
Agrovoc: HYBRIDS
Journal: International Journal of Applied Sciences and Biotechnology

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  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech

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