scholarly journals Kandungan Minyak 30 Genotipe Jagung dan Korelasinya terhadap Beberapa Karakter Agronomi

2018 ◽  
Vol 46 (3) ◽  
pp. 254-261
Author(s):  
Nailatul Karomah ◽  
Willy Bayuardi Suwarno ◽  
Dan Muhammad Azrai
Keyword(s):  
Regression Model ◽  
Oil Content ◽  
Agronomic Traits ◽  
Kernel Weight ◽  
Area Ratio ◽  
Corn Breeding ◽  
Maize Genotypes ◽  
Maize Varieties ◽  
Ear Height ◽  
Industrial Demand

Industrial demand for maize oil has been increasing and therefore corn breeding efforts began to focus on developing improved maize varieties with high oil content. The objectives of this research were to determine oil content of maize genotypes and its relationship with several agronomic traits. The oil content of maize genotypes ranged from 3.77 to 5.46%. Based on the correlation analysis, oil content correlated significantly with plant height, ear height, embryo weight, kernel weight, endosperm weight, and embryo and endosperm area ratio. In addition, oil content of maize genotypes could be estimated by a regression model involving embryo and endosperm area ratio, endosperm weight, ear height, cob lenght, number of kernel rows, number of kernel per row, cob diameter, and husk coverage (R2 = 79.66%; P = 0.0001). The oil-correlated traits and regression model obtained can be considered for facilitating selection for high oil maize genotypes. In addition, the results indicate that high oil maize can be bred and selected without affecting yield.Keywords: high oil maize, simultaneous selection, stepwise regression

scholarly journals Assessing genetic diversity of Maize (Zea mays L.) genotypes for agronomic traits

2015 ◽  
Vol 2 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Shanjida Rahman ◽  
Md Mukul Mia ◽  
Tamanna Quddus ◽  
Lutful Hassan ◽  
Md Ashraful Haque
Keyword(s):  
Genetic Diversity ◽  
Plant Height ◽  
Coefficient Of Variation ◽  
Significant Variation ◽  
Zea Mays L ◽  
Agronomic Traits ◽  
Correlation Study ◽  
Kernel Weight ◽  
Maize Genotypes ◽  
Ear Height

Maize is one of the most important cereals globally and a promising cereal supplement in Bangladesh. The current study was undertaken to assess genetic diversity among nine maize genotypes. Data were recorded on seven morphological traits viz. plant height (cm), ear height (cm), ear length (cm), ear diameter (cm), number of kernels/ear, 1000-kernel weight (g) and yield/plant (g). Statistical analysis showed significant variation among maize genotypes. Considering plant height, ear length, ear diameter, ear height, number of kernels/ear and yield/plant BHM-7 was observed as the best one. Among all the traits higher phenotypic coefficient of variation and genotypic coefficient of variation were observed for yield/plant. Genetic advance was highest for 1000-kernel weight followed by number of kernels/ear. The correlation study revealed only two positive significant associations: plant height with yield/plant and ear diameter with ear length. Nine genotypes were grouped into three clusters. These all clearly indicated the presence of ample genetic diversity among maize genotypes which can be exploited in future breeding program for better utilization of maize germplasm.Res. Agric., Livest. Fish.2(1): 53-61, April 2015

Yield performance with heritability measurements of half sib families obtained from maize variety Azam

1970 ◽  
pp. 33-36
Author(s):  
Faizan Mahmood, Hidayat- Ur-Rahman, Nazir Ahmad ◽  
Fahim-ul- Haq ◽  
Samrin Gul, Quaid Hussain ◽  
Ammara Khalid ◽  
Touheed Iqbal ◽  
...  
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Heritability Estimate ◽  
Kernel Weight ◽  
Yield Performance ◽  
Grain Moisture ◽  
Maize Variety ◽  
Ear Height ◽  
Sib Families

This study evaluated the performance of 64 half sib families (HSF) derived from “Azam” variety of maize using partially balanced lattice square design with two replications. Data were recorded on grain yield and other agronomic traits. Observations showed difference in half-sib families for studied traits. Among the 64 half-sib families, minimum days to 50% tasseling (51 days) were observed for HS-49 while maximum (57 days) for HS-63. Minimum days to 50% silking (56 days) were counted for HS-6 while maximum (63 days) for HS-23. Minimum days to 50% anthesis (55 days) were counted for HS-1 and HS-6 while maximum (62 days) for HS-23. Similarly, minimum ASI (-2 days) were observed in HS-1, HS-15, HS-16, HS-28 and HS-63 while maximum (2 days) in HS-48. Minimum (60 cm) ear height was recorded for HS-11 and maximum (93.5 cm) for HS-28. Minimum fresh ear weight (1.3 kg) was weighted for HS-17 while maximum (3.2 kg) for HS-21. Grain moisture was recorded minimum (19.35 %) for HS-19 and maximum (31.25%) for HS-2. HS-42 showed minimum (28 g) 100 kernel weight while HS-5 showed maximum (47 g). Grain yield was minimum (2323 kg ha-1) for HS-17 and maximum (5742 kg ha-1) for HS-21. Maximum heritability estimate (0.92) was recorded for fresh ear weight, while minimum (0.41) was observed for ear height.

scholarly journals Genetic variability, heritability and genetic advance for growth, yield and yield related traits in maize genotypes

2021 ◽  
Vol 2 (2) ◽  
pp. 96-104
Author(s):  
Roshesh Rai ◽  
Prakash Khanal ◽  
Prabin Chaudhary ◽  
Rabin Dhital
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Agronomic Traits ◽  
Block Design ◽  
Genetic Advance ◽  
Improvement Program ◽  
Positive Correlation ◽  
Maize Genotypes ◽  
High Heritability ◽  
Ear Height

Evaluation of the genetic variability, heritability and genetic advance of traits is an essential task in any plant improvement program. Twenty maize genotypes were replicated twice in a randomized complete block design on a research plot of Prithu Technical College, Deukhuri Dang of Nepal from June 2017 to September 2017 to determine genetic variability, heritability, and genetic advance for different agronomic traits. Analysis of variance showed significant differences in the traits tassel length, ear height, days to fifty percent tasseling, days to fifty percent silking, kernels’ rows ear-1, kernels row-1 and grain yield. The highest GCV (31.53%) and PCV (39.20%) were recorded on grain yield. Grain yield and ear height recorded high heritability along with high genetic advance as a percent of mean (GAM). Tassel length and kernels row-1 showed high heritability integrated with moderate GAM and moderate heritability integrated with moderate GAM respectively. Further, grain yield showed a significant and positive correlation with plant height, tassel length, ear height, cob length, cob diameter, kernels’ rows ear-1, and kernels row-1. Thus the selection of ear height, tassel length and kernels row-1 is suggested as they performed better in terms of both heritability and GAM than other traits and they also recorded a significant and positive correlation with yield.

scholarly journals Impact of Different Nitrogen Levels to the Grain Yield and Yield Components of Some Corn (Zea mays L.) Hybrids

2021 ◽  
pp. 48-60
Author(s):  
Wisam Khald Sabri ◽  
Abdullah Oktem
Keyword(s):  
Grain Yield ◽  
Leaf Area Index ◽  
Nitrogen Fertilizer ◽  
Kernel Weight ◽  
Total Chlorophyll ◽  
Area Index ◽  
Nitrogen Levels ◽  
Maize Genotypes ◽  
Maize Varieties ◽  
Single Cross

Aims: The study was designed to elucidate the effect of different nitrogen (N) fertilizer levels on five different maize cultivars. Study Design:  A split plot experimental design in randomized complete blocks (RCBD) with three replicates. Arrangement of seven nitrogen levels and five single cross hybrids were compared. Main plots were nitrogen levels and subplots were varieties. Place and Duration of Study: College of Agricultural Engineering Sciences at the University of Duhok, Iraq. The study was undertaken fromMarch– August 2021. Methodology: At the present research, five single cross-hybrid corn varieties were used, which were: CADZ, DKC6050, DRACHMA, MYIMY and ZP6468D. Arrangement of seven nitrogen fertilizer levels were 0, 50, 100, 150, 200, 250 and 300 kg N ha−1. The following features were studied: plant height, leaf area index, thousand kernel weight, total grain yield, total chlorophyll, protein% and oil %.The collected data were projected to SAS software program for analysis. The significant differences between treatment means were calculated using Duncan’s multiple ranges. Results: It was reveal that there were significant effect of different nitrogen fertilizer levels, maize genotypes as well as the interaction of nitrogen and genotype of maize (P<.01) for plant height, leaf area index, 1000 kernel weight, total grain yield, total chlorophyll and protein %. However, There were no significant differences between different maize genotypes as well as different nitrogen fertilizer levels (P>.05) with oil %, but the interaction of nitrogen and genotype of maize was significant (P<.01). Conclusion: Increasing the amount of nitrogen had better effect on studied characteristics of different maize varieties, in which adding 300 kg nitrogen had optimum results. In considering the response of maize varieties to nitrogen, the best variety was DRACHMA genotype while the worst variety was CADZ genotype, however this hybrids was superior in some traits.

scholarly journals Evaluation of Drought Tolerant Maize Varieties under Drought and Rain-Fed Conditions: A Rainforest Location

2016 ◽  
Vol 8 (7) ◽  
pp. 153
Author(s):  
Abimbola Oluwaranti ◽  
Oluwatosin Temilade Ajani
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Drought Tolerant ◽  
Cropping Season ◽  
Strong Positive Relationship ◽  
Maize Varieties ◽  
Ear Height ◽  
The Relationship ◽  
Ear Number

<p>Newly developed drought tolerant maize (<em>Zea mays</em> L.) varieties have been hypothesized to be of different genetic make-ups, hence this study was conducted to evaluate drought-tolerant maize varieties under drought and rain-fed conditions, identify the highest yielding varieties and determine the relationship between agronomic traits and varieties’ yield under these conditions in a rainforest location. Nine drought tolerant varieties of maize and a local check were evaluated during the early part of the early cropping season (March) (Drought) as well as the actual early cropping season (May-June) (Rain-fed) of 2015 at the Teaching and Research Farm (T&amp;RF) of Obafemi Awolowo University, Ile-Ife (7°28'N, 4°33'E and 244 m above sea level). There were significant differences among the two environments for all the traits measured. The performance of the drought tolerant maize varieties is better under the rain-fed condition. The yield performance of all varieties are not significantly different from each other (1.36 tons/ha to 2.75 tons/ha) under drought except EVDT-W 2000 STR C<sub>0</sub> (1.10 tons/ha). All the varieties evaluated under rain-fed condition produce higher grain yield (2-44 tons/ha-3.69 tons/ha) which are not significantly different each other. All the yield components except ear height and length had a strong positive relationship with grain yield under drought while only ear number and weight had relationship with yield under rain-fed condition. In conclusion, among the drought tolerant maize varieties, EVDT-W 2000 STR C<sub>0</sub> need further improvements to drought. Furthermore, ear weight can be used to select parents for the development of drought tolerant maize varieties in this agro-ecology.</p>

scholarly journals Heterosis for Flowering Time and Agronomic Traits among Early Open-pollinated Sweet Corn Cultivars

2002 ◽  
Vol 127 (5) ◽  
pp. 793-797 ◽  
Author(s):  
T.E. Dickert ◽  
W.F. Tracy
Keyword(s):  
Flowering Time ◽  
Plant Height ◽  
Combining Ability ◽  
Sweet Corn ◽  
Agronomic Traits ◽  
Diallel Cross ◽  
Kernel Weight ◽  
Ear Height ◽  
The Difference ◽  
Very High

Heterosis in corn (Zea mays L.) usually results in earlier flowering, larger plants, and increased yield. In extremely early sweet corn the effect of heterosis on flowering time may be reduced or eliminated due to developmental and physiological requirements for vegetative growth before the transition to reproductive phase. The objective of this study was to determine the level of heterosis and the combining ability for flowering time and other agronomic traits in a diallel cross of six very early open-pollinated sweet corn cultivars. The diallel was grown in 1995 and 1996. Hybrids and parents averaged over hybrids differed for silk date, plant height, ear height, 10-ear weight, ear length, and 100-kernel weight but did not differ for row number and ear width. Heterosis for silk date was significant, but the difference between parents and hybrids was very small, 0.5 day. No hybrids were earlier than the earliest parent, and average midparent heterosis was -0.8%. In contrast midparent heterosis was significant and relatively high for 100-kernel weight (10.0%), ear length (12.9%), ear height (8.6%), plant height (9.0%), and 10-ear weight (28.2%). The traits with low heterosis had very high general combining ability/specific combining ability ratios while these ratios were much smaller in traits with high heterosis. Heterosis for many of the traits, including 10-ear weight, was higher than published values. Conversely, heterosis for flowering time was small, compared to other traits in this study and to published values for silk date, indicating that this extremely early germplasm may be at or near the limit for flowering time under the photoperiod and temperatures typical of summer in Madison, Wis. (43.05°N, 89.31°W).

scholarly journals Genetic Variability of Maize Hybrids and Populations and Interrelationships among Grain Yield and Its Related Traits under Drought and Low N Using Multivariate Analysis

2020 ◽  
pp. 26-44 ◽  
Author(s):  
A. M. M. Al- Naggar ◽  
M. M. Shafik ◽  
Rabeh Y. M. Musa ◽  
A. S. M. Younis ◽  
A. H. Anany
Keyword(s):  
Genetic Diversity ◽  
Multivariate Analysis ◽  
Grain Yield ◽  
Genetic Relatedness ◽  
Agronomic Traits ◽  
Chlorophyll Concentration ◽  
Kernel Weight ◽  
Phenotypic Data ◽  
Germplasm Collections ◽  
Maize Genotypes

One of the best biometrical methods for estimating genetic diversity among germplasm collections is multivariate analysis; it is used to study their variability and genetic relatedness in order to increase their value in plant breeding programs. The objectives of the present study were to: (i) evaluate the magnitude of genetic diversity, based on phenotypic data, among 19 maize genotypes, under drought and/or low N stressed conditions in the field, using principle component analysis (PCA) and (ii) assess the interrelationships between maize grain yield and its related traits under such stressed conditions using genotype × trait (GT) biplot analysis. An experiment was conducted in two seasons using a split-split plot design with 3 replications, where 2 irrigation regimes (well-watered and water stressed at flowering) occupied the main plots, three N rates (high N, medium N and low N) occupied the sub plots and 19 maize genotypes occupied the sub-sub plots. The genotypes were evaluated for 19 agronomic traits. Analysis of variance was performed under each of the six environments. Significant differences (p≤0.01) were recorded among the maize genotypes for all studied traits under each environment. The best genotypes for each trait were identified. Results of the GT biplot indicated that high means of 100-kernel weight (100-KW), ears/plant (EPP), ear height, days to silking, days to anthesis, plant height, and chlorophyll concentration index (CCI) under water stress (WS), kernels/row (KPR), EPP, 100-KW and CCI under low N and KPR, EPP and 100-KW under WS combined with low N environment and low values of anthesis-silking interval (ASI) under the three stressed environments could be considered selection criteria for high grain yield under respective stressed environments and for drought and/or low N tolerance. It is recommended to select for high values of KPR, EPP and 100-KW and low value of ASI in order to increase grain yield under such stressed conditions.

scholarly journals Response of mass selection in maize (Zea mays L.)

Our Nature ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 35-42
Author(s):  
Jiban Shrestha ◽  
Chitra Bahadur Kunwar ◽  
Balram Bhandari
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Block Design ◽  
Winter Season ◽  
Research Field ◽  
Mass Selection ◽  
Original Population ◽  
Maize Population ◽  
Maize Genotypes ◽  
Ear Height

This study was conducted to quantify the progress towards grain yield and agronomic traits in maize genotypes through mass selection. The original maize population and the population derived after five cycles of mass selection were planted for comparison at research field of National Maize Research Program, Rampur, Chitwan, Nepal during winter season of 2011-2012. The maize genotypes were Arun-1EV, Arun-4, Pool-17, P501SRCO × P502SRCO, BGBYPOP, Across9942 × Across9944, S99TLYQ-B, S99TLYQ-AB and S01SIWQ-3, respectively. The experiment was laid down in randomized complete block design with three replications. Each replication consisted of 180 rows; 20 rows of each genotypes. The results showed that there was significant reduction in plant height, ear height, tasseling days, silking days, disease severity however significant increment in grain yield. The results showed that phenotypic superiority of the selected population over the original population was obvious.

scholarly journals Evaluation of Hybrid and OPV Maize Varieties for Grain Yield and Agronomic Attributes under Farmer's Field Conditions at Dukuchhap

2014 ◽  
Vol 9 ◽  
pp. 17-20 ◽  
Author(s):  
Min N. Paudel
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Agronomic Traits ◽  
Grain Weight ◽  
Yield Attributes ◽  
Bivariate Correlation ◽  
Maize Varieties ◽  
Ear Height ◽  
Study Support ◽  
Stalk Lodging

Field experiments were conducted during two consecutive years 2006 and 2007 in full season of maize (May-Sep) at Dukuchhap, Lalitpur to find out impact of growing hybrid and OPV maize in different rows combinations with respect to their pure stands in same environment of growing and to sort out non-lodging maize varieties. The experiments consisted of an open pollinated variety (OPV) 'Deuti' and hybrid 'Gaurab' in different row combinations (50% hybrid + 50% OPV, 75% hybrid + 25% OPV, 75% OPV + 25% hybrid plus their pure stands). The results showed that Gaurab (yellow, flint type) and Deuti (white, semi- flint type, selected from CIMMYT's material ZM 621) did not vary significantly in grain yield and yield components. There was no effect of mixed row culture between the OPV and hybrid for grain yield and yield attributes. A bivariate correlation coefficient between agronomic traits and ear traits indicated that there was a positive relation among these traits. However, a positive and highly significant (r = 0.766**) relationship between ear fill and ear length was observed while a very weak relation (r = 0.096*) between grain weight/ear and ear height was also noticed suggesting taller the ear height lower the grain yield/ear and vice versa. The findings of the study support that plant height and ear height were weakly related with other ear traits; nevertheless, these were highly related to grain weight/per plant. To cope with stalk lodging problem and to attain higher grain yield these varieties are equally potential and recommended to grow under Dukuchhap conditions.Nepal Agric. Res. J. Vol. 9, 2009, pp. 17-20  DOI: http://dx.doi.org/10.3126/narj.v9i0.11637

Relation of Kernel Oil Content to Some Agronomic Traits in Maize

Crop Science ◽  
1963 ◽  
Vol 3 (4) ◽  
pp. 354-355 ◽  
Author(s):  
D. E. Alexander ◽  
R. D. Seif
Keyword(s):  
Oil Content ◽  
Agronomic Traits ◽  
Kernel Oil
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