Kandel Bishnu Prasad, Shrestha Kumar
Department of Plant Breeding, Post Graduate Program, Institute of Agriculture and Animal Science, Tribhuvan University, Kirtipur, Nepal.
Department of Plant Biology, Ecology and Evolution, Oklahoma State University, Stillwater, OK, 74078, USA.
Heliyon. 2020 Dec 7;6(12):e05542. doi: 10.1016/j.heliyon.2020.e05542. eCollection 2020 Dec.
Hybridization plays a vital role in increasing the production and productivity of maize. Evaluating maize hybrids in a specific environment is a key task for the hybrid maize program. The objective of this study was to identify a promising maize hybrid for winter planting in inner terai regions. Ten maize hybrids were evaluated in a randomized complete block design (RCBD) with three replications during the winter season of 2018 and 2019 at the research field of Purwanchal Agriculture Campus, Jhapa, Nepal. The results suggested that among tested hybrids, P3396 (11.18 tons ha), Shresta (10.67 tons ha), and Rampur Hybrid 6 (10.37 tons ha) produced significantly higher yield in 2018 whereas P3396 (11.10 tons ha), Shresta (10.20 tons ha), and Ganga Kaveri (10.03 tons ha) were the ones with the highest grain yield in 2019. Comparing both years, P3396 and Shresta consistently outperform the other hybrids in terms of grain yield, which is an important traits for the farmers. Correlation studies suggested that ear weight and thousand-grain weight showed a positive significant correlation with grain yield. Therefore, we suggest P3396 and Shresta as promising hybrids for the maize growers in the inner terai regions of Nepal.
杂交在提高玉米产量和生产率方面发挥着至关重要的作用。在特定环境中评估玉米杂交种是杂交玉米项目的一项关键任务。本研究的目的是确定一种适合在尼泊尔内特赖地区冬季种植的有前景的玉米杂交种。2018年和2019年冬季，在尼泊尔贾帕县普尔万查尔农业校区的研究田，采用随机完全区组设计（RCBD），对10个玉米杂交种进行了评估，重复3次。结果表明，在测试的杂交种中，P3396（11.18吨/公顷）、什雷斯塔（10.67吨/公顷）和兰布尔杂交种6（10.37吨/公顷）在2018年的产量显著更高，而P3396（11.10吨/公顷）、什雷斯塔（10.20吨/公顷）和恒河卡维里（10.03吨/公顷）在2019年的籽粒产量最高。比较这两年，P3396和什雷斯塔在籽粒产量方面始终优于其他杂交种，这对农民来说是一个重要性状。相关性研究表明，穗重和千粒重与籽粒产量呈显著正相关。因此，我们建议P3396和什雷斯塔作为尼泊尔内特赖地区玉米种植者有前景的杂交种。
