Performance evaluation of quality protein maize genotypes across various maize production agro ecologies of Nepal

Shrestha, Jiban; Koirala, Keshab Babu; Katuwal, Ram B.; Dhami, Narayan Bahadur; Pokhrel, Bhanu Bhakta; Ghimire, Bikash; Prasai, Hari Kumar; Paudel, Arjun; Pokhrel, Keshav; Kc, Govind

doi:10.3126/jmrd.v1i1.14241

Cited by 17 publications

(15 citation statements)

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“…Where, This formula was also adopted by Carangal et al (1971) and Shrestha et al (2015) to adjust the grain yield (kg/ha) at 15% moisture content. This adjusted grain yield (kg/ha) was again converted to grain yield (t/ha).…”

Section: Field Measurementsmentioning

confidence: 99%

Evaluation of early maize genotypes for grain yield and agromorphological traits

Dhakal

Shrestha

Joshi

et al. 2018

J. Maize Res. & Dev.

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The purpose of this study was to assess the variation on agro-morphological traits and grain yield. A set of 14 early maize genotypes were studied at research field of Regional Agricultural Research Station (RARS), Doti, Nepal in summer seasons of 2015 and 2016. The experiment was carried out in Randomized Complete Block Design (RCBD) with three replications in each year. The variation among genotypes was observed for grain yield and flowering. The genotype SO3TEY-PO-BM produced the highest grain yield (4.33 t/ha) in 2015 whereas Rajahar Local Variety produced the highest grain yield (2.52 t/ha) in 2016. The combined analysis over years showed that Farmer's variety was found earlier in tasseling (36 days) and silking (39 days), followed by S97TEYGHAYB(3) in tasseling (45 days) and by S97TEYGHAYB(3) and Arun-4 in silking (48 days). EEYC1 produced the highest grain yield (3.17 t/ha), followed by COMPOL-NIBP (3.09 t/ha), SO3TEY-PO-BM (2.90 t/ha), S97TEYGHAYB(3) (2.78 t/ha) and Rajahar Local variety (2.77 t/ha), respectively. The information on variation for the agro-morphological traits among studied early maize genotypes will be helpful to plant breeders in constructing their breeding materials and implementing selection strategies.

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Section: Field Measurementsmentioning

confidence: 99%

Evaluation of early maize genotypes for grain yield and agromorphological traits

Dhakal

Shrestha

Joshi

et al. 2018

J. Maize Res. & Dev.

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“…Tassel blast was obtained by the counting the number of plants that showed tassel blast symptoms (tassel dried with partial or no pollen shedding) in the total number of plants in particular plot was expressed in percentage. Grain yield was calculated using formula adopted by Carangal et al (1971) and Shrestha et al (2015) by adjusting the grain moisture at 15% and converted to the grain yield per hectare.…”

Section: Data Collectionmentioning

confidence: 99%

Analysis of genetic diversity among the maize inbred lines (Zea mays L.) under heat stress condition

Kandel

Ghimire

Ojha

et al. 2018

J. Maize Res. & Dev.

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High temperature adversely affects the plant physiological processes: limits plant growth and reduction in grain yield. Heat stress is often encountered to spring sowing of maize in spring season. Twenty maize inbred lines were studied for days to 50 % anthesis and silking, anthesis-silking interval, leaf firing, tassel blast, SPAD reading and leaf senescence, plant and ear height, leaf area index, ear per plant, cob length and diameter, number of kernel/ear, number of kernel row/ear, number of kernel row, silk receptivity, shelling percentage, thousand kernel weight and grain yield in alpha lattice design at National Maize Research Program at Rampur, Chitwan,Nepal with the objective to identify superior heat stress tolerant lines. Analysis of variance showed significant difference for all the traits. Result of multivariable analysis revealed that twenty inbred lines formed four clusters. The resistance inbred lines and susceptible inbred lines formed different clusters. The members of cluster 4 were found to be tolerant to heat stress due to they had lowest value of tassel blast, leaf firing, and leaf area index with highest value of cob diameter and length, ear per plant, number of kernel row/ear, number of kernel/ear, number of kernel row, shelling percentage, silk receptivity and grain yield whereas as members of cluster 1were found most susceptible due to they had longer anthesis silking interval, with maximum tassel blast and leaf firing along with no grain yield under heat stress condition. From this study inbred lines RL-140, RML-76, RML-91 and RML-40 were found most tolerant to heat stress. These inbred lines belonging to superior cluster could be considered very useful in developing heat tolerant variety and other breeding activities.

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“…The grain yield (kg/ha) was recorded by weighing the grains shelled from the ears obtained from the central four rows of each subplot and converted it into kg/ha using the formula: Grain yield was obtained by adjusting the grain moisture at 15% and converted to the grain yield per hectare with the help of the following formula ( ). Carangal et al, 1971;Shrestha et al, 2015 Where, MC = Moisture content of grain (%) just before weighing the seed bulk Y = Net plot yield (kg) 0.8 = Shelling percentage 2 A = Net plot area (m ) (100-MC)/(100-15) = Conversion factor for grain yield at 15% moisture content (10,000)/A = Conversion factor for actual harvested area into hectare basis. The grain yield was converted from kg/ha into tones/ha.…”

Section: Worldwide Maize (Zea Mays L) Is Leading Energy Providing Fmentioning

confidence: 99%

Effect of Sowing Dates on Growth and Grain Yield of Maize Inbred Lines

Bhusal¹,

Subedi²,

Shrestha³

2016

JAS

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This study was carried out at National Maize Research Program, Rampur, Chitwan, Nepal to evaluate the effect of sowing dates on growth and grain yield of maize inbred lines. Seven maize inbred lines namely NML-2, RML-17, RML-32, RML-4, RML-86, RML-95 and RML-96 were planted on three different dates i.e. September 02, September 12, September 22, 2015 during winter using randomized complete block design with two replications. The results of this study showed that the growth and yield traits were significantly affected by various planting dates. The inbred line RML-17 produced the highest grain yield where as NML-2 gave the lowest yield during winter season. The highest yield was obtained when inbred lines were planted on September 12 and the lowest yield on September 2. The planting from September 2 to September 12 increased the grain yield. The delay in planting i.e. September 22 decreased grain yield. Therefore September 12 planting was suitable for inbred lines to maximize grain yield production.Keywords: Sowing dates, maize inbred line, yield and agronomic traits INTRODUCTION Worldwide, Maize (Zea mays L.) is leading energy providing food crop apart from wheat and rice ( ). Maize occupies second largest cultivated area (849635 ha) after rice (1420570 ha) in the Nepal ( ). Out of the total cultivated area of cereal crops (3339077 ha), the share of maize cultivation is 25.44%. The contribution of agriculture and forestry sector in GDP is 34.74% and 65.6% population are being engaging in agriculture sectors. National average productivity of maize is 2353 kg/ha. Among the total cereal production of the country (8580285 mt), the contribution of maize is 23.29%. The seed yield of corn (Zea mays L.) consists of different proportional contributions of the effective factor in all growth stages from emergence to maturity. In order to minimized negative effect of some abiotic and biotic stress on plant, sowing date can play a major role in determining the seed yield, quality, seed germination and understanding whole phenological stages in many regions. Early and intermediate sowings tend to best utilize solar radiation for grain production ( ). Each hybrid has an optimum sowing date, and the greater the deviation from this optimum (early or late sowing), the greater the yield loss ( ). Planting date was reported to affect the growth and yield of maize significantly.( ) suggested that farmers should plant on more than one planting date in order to safeguard against unpredicted seasons.

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Performance evaluation of quality protein maize genotypes across various maize production agro ecologies of Nepal

Cited by 17 publications

References 1 publication

Evaluation of early maize genotypes for grain yield and agromorphological traits

Evaluation of early maize genotypes for grain yield and agromorphological traits

Analysis of genetic diversity among the maize inbred lines (Zea mays L.) under heat stress condition

Effect of Sowing Dates on Growth and Grain Yield of Maize Inbred Lines

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