Performance of Single Cross Maize (Zea mays L.) Hybrids under Rainfed Middle Hill Environments of Nepal
Keshab Babu Koirala1,* , Subash Subedi1, Mahendra Prasad Tripathi1
Maize is the livelihood of smallholder farmers and priority food crop in the middle hills of Nepal. To achieve maize self-sufficiency in the country we need to shift from open-pollinated varieties to hybrids in potential pockets of middle hills. Coordinated varietal trials on hybrids were conducted for three consecutive years from 2016/17 to 2018/19 across the middle hills during summer to identify high-yielding, biotic and abiotic stresses resistant/tolerant single crosses that fit into the existing rainfed cropping system. We evaluated fifteen, nine, and ten genotypes in 2016/17, 2017/18, and 2018/19, respectively. Trials were replicated thrice using a randomized complete block design with a unit plot size of four rows of 4-m long. Based on acceptable grain yield, anthesis to the silking interval, ear position, and Turcicum leaf blight (TLB) and Grey leaf spot (GLS) reaction, CAH1715 (9.12 t ha-1), RML-4/RL-111(8.72 t ha-1), RML-98/RL-105 (8.25 t ha-1), RL-150/RL-111 (8.18 t ha-1), RL-36/RL-105 (8.04 t ha-1), CAH1521 (7.67 t ha-1) and Rampur Hybrid-10 (7.65 t ha-1) were identified promising. These genotypes will be promoted to farmers’ field trials and other participatory variety selection activities.
Keywords: Anthesis-silking interval, Hybrid, Multi-national company hybrid, Single cross
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