Evaluation of white grain maize varieties for growth, yield and yield components

Abstract

Maize (Zea mays L.) is one of the most commonly cultivated crop after rice in Nepal. The present study was done to evaluate and recommend the best performing white maize genotypes in mid hill region of Nepal. This study was conducted at research field of Kavre, Nepal during the rainy season of 2019. Five white maize genotypes were evaluated in randomized complete block design with four replications where Deuti used as standard check. Ear and plant height of plant, days to 50% silking and tasseling, count of leaf above and below main cob, total number of leaf, cob length, cob diameter, kernel rows per cob, kernels count per row, thousand kernels weight, shelling and sterility percentage, stay green and grain yield parameters were observed. Deuti and DMH-7314 had good stay green and husk cover rating. Plant height (282.6 cm) and ear height (162.4 cm) was more in HB-008. Number of kernels per row was more in HB-008 (36.5) and HB-007 (36.5) and thousand kernel weights was more in DMH-7314 (386.3 g) followed by Deuti (353.9 g). DMH-7314 was late in tasseling (86 days) and silking (89 days) but shelling percentage was lowest in DMH-7314 (70.8) than other varieties. Analysis of variance reveled that genotype HB-008 (9.70 t/ha) as compared to standard check Deuti (7.80 t/ha). Thus genotype HB-008 perform better in mid hill region of Kavre, Nepal.

Grain Yield Stability of Maize (Zea mays L.) Hybrids using Ammi Model and GGE Biplot Analysis

“…KWM-92 × KWM-93 (9.83 t ha -1 ) yielded significantly more grain than KWM-91 × KWM-93 (9.50 t ha -1 ) under the Khumaltar conditions. These findings were similar to those of Kafle et al (2020), Shrestha (2016), Shrestha et al (2019), Adhikari et al (2018), Bastola et al (2021), Dhakal et al (2018), and Prasai et al (2015), who observed significant differences in grain yield between maize genotypes. The genetic makeup of maize genotypes differed, resulting in differences in grain yield across the locations.…”

Evaluation of Maize Genotypes for Yield and Yield Attributes in Chitwan, Nepal

“…Rampur composite had cob with lowest diameter than other genotypes which might be the reason for lower yield of maize. Maruthi and Rani (2015) and Bastola et al (2021) also had similar results in cob diameter among different maize genotypes. Cob length-diameter ratio was more in Rajkumar while CP-858 had lowest length diameter ratio.…”

“…Due to lowest number of kernel per rows in Rampur composite lower yield was recorded. Bastola et al (2021) and Singh et al (2013) also reported varietal differences in number of kernels per row. JKMH 502 had more weight of thousand kernels while lowest was observed in CP-666 than other genotypes in research.…”

Evaluation of Different Hybrid Maize Varieties on Yield and Agronomic Traits at Udayapur, Nepal

“…Plant height is important traits for determining the lodging and grain yield of maize. Lower the plant height fosters less accumulation of photosynthate in the maize stover and play the vital role for translocation of produced photosynthate to the grain and gives the higher yield (Bastola et al 2021). Similarly, varieties had highly significant effect on days to 50% tasseling but there is no any significant effect on days to silking (Table 1).…”

“…Akbar et al (2008) and Kandel et al (2017) also reported significant variation for days to silking among different maize hybrids. Due to earlier tasselling and silking, less number of days will be available for the crop growth by which less photosynthate will deposit in the grain and affect the grain yield which might be the reason for higher yield in the CP-666 and lower yield in TX-369 (Bastola et al 2021).…”