scholarly journals Exploitation of Hybrid Vigor for Identification of Promising Sorghum F1 Hybrid for High Grain Yield and Resistance to Sorghum Midge

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Massaoudou Hamidou ◽  
Oumarou Souleymane ◽  
Mahamadou Salifou ◽  
Malick N. Ba ◽  
Issoufou Kapran ◽  
...  
Keyword(s):  
Grain Yield ◽  
Grain Sorghum ◽  
Hybrid Vigor ◽  
Cereal Crop ◽  
F1 Hybrid ◽  
The World ◽  
Improvement Programs ◽  
Parental Lines ◽  
Sorghum Production ◽  
Better Than

Sorghum is the second most grown cereal crop in Niger. However, sorghum production in the country is dominated by indigenous cultivars with low productivity. Productivity in grain sorghum has been achieved in developing countries around the world using hybrids. This study was conducted to evaluate heterosis in F1 sorghum hybrids for grain yield and resistance to midge. Fifty F1 sorghum hybrids were evaluated for grain yield and resistance to midge. Variation for grain yield, midge resistance, and flowering time was observed. The magnitude of better parent heterosis for grain yield and resistance to midge varied significantly among hybrids. Four hybrids combined high better parent heterosis for both grain yield and resistance to midge while eight hybrids were better than their better parent for resistance to midge. These hybrids performed well for grain yield and/or resistance to midge. Therefore, the parental lines involved in these hybrids can be advanced for commercial hybrids production or used in sorghum improvement programs.

scholarly journals Correlation of yield and heterosis of maize hybrids and their parental lines with genetic distance based on SSR markers

Genetika ◽  
2012 ◽  
Vol 44 (2) ◽  
pp. 399-408 ◽  
Author(s):  
Snezana Mladenovic-Drinic ◽  
Marija Kostadinovic ◽  
Danijela Ristic ◽  
Milan Stevanovic ◽  
Zoran Camdzija ◽  
...  
Keyword(s):  
Grain Yield ◽  
Genetic Distance ◽  
Ssr Markers ◽  
F1 Hybrids ◽  
F1 Hybrid ◽  
Maize Hybrids ◽  
Average Value ◽  
Parental Inbred ◽  
The Mean ◽  
Parental Lines

The yield, grain yield heterosis and genetic distance based on SSR markers were analyzed in eight maize hybrids and their parental lines. The mean grain yield of all F1 hybrids was 11.37 tha-1. The F1 hybrid from the crosses between L4xL6 gave the highest grain yield of 12.12 tha-1. For the mid parent heterosis (MPH) grain yields of the F1 hybrids, the data showed the average value of 164.25%, and ranged from 136.72% (L4xL6) to 218.07% (L8xL2), and for better parent heterosis (BPH) from 100.70% (H4) to 212.60% (H2), averaged 137.36%. The average genetic distance among parental inbred lines of analyzed hybrids was 0.58 with a range from 0.55 to 0.61. The GD showed a positive correlation with the grain yield of the F1 hybrids (0.22), as well as with MPH and BPH, with the values of 0.12 and 0.45, respectively.

scholarly journals Graze to grain—measuring and modelling the effects of grazed pasture leys on soil nitrogen and sorghum yield on a Vertosol soil in the Australian subtropics

2006 ◽  
Vol 57 (5) ◽  
pp. 489 ◽  
Author(s):  
A. M. Whitbread ◽  
R. L. Clem
Keyword(s):  
Grain Yield ◽  
Soil Nitrogen ◽  
Crop Production ◽  
High Growth ◽  
Farming Systems ◽  
Grain Sorghum ◽  
Water Dynamics ◽  
Lablab Purpureus ◽  
Systems Model ◽  
Sorghum Production

Highly productive sown pasture systems can result in high growth rates of beef cattle and lead to increases in soil nitrogen and the production of subsequent crops. The nitrogen dynamics and growth of grain sorghum following grazed annual legume leys or a grass pasture were investigated in a no-till system in the South Burnett district of Queensland. Two years of the tropical legumes Macrotyloma daltonii and Vigna trilobata (both self regenerating annual legumes) and Lablab purpureus (a resown annual legume) resulted in soil nitrate N (0–0.9 m depth), at sorghum sowing, ranging from 35 to 86 kg/ha compared with 4 kg/ha after pure grass pastures. Average grain sorghum production in the 4 cropping seasons following the grazed legume leys ranged from 2651 to 4012 kg/ha. Following the grass pasture, grain sorghum production in the first and second year was <1900 kg/ha and by the third year grain yield was comparable to the legume systems. Simulation studies utilising the farming systems model APSIM indicated that the soil N and water dynamics following 2-year ley phases could be closely represented over 4 years and the prediction of sorghum growth during this time was reasonable. In simulated unfertilised sorghum crops grown from 1954 to 2004, grain yield did not exceed 1500 kg/ha in 50% of seasons following a grass pasture, while following 2-year legume leys, grain exceeded 3000 kg/ha in 80% of seasons. It was concluded that mixed farming systems that utilise short term legume-based pastures for beef production in rotation with crop production enterprises can be highly productive.

EFFECTS OF ROW SPACING AND POPULATION DENSITY ON GRAIN SORGHUM PRODUCTION IN SOUTHERN ALBERTA

1976 ◽  
Vol 56 (1) ◽  
pp. 31-37 ◽  
Author(s):  
B. R. HEGDE ◽  
D. J. MAJOR ◽  
D. B. WILSON ◽  
K. K. KROGMAN
Keyword(s):  
Population Density ◽  
Grain Yield ◽  
Yield Components ◽  
Growing Season ◽  
Grain Sorghum ◽  
Row Spacing ◽  
Population Densities ◽  
Southern Alberta ◽  
Sorghum Production ◽  
Narrow Row

Row spacings of 18–72 cm and population densities of 75,000 to 346,000 plants/ha had no consistent effect on grain yield of two sorghum hybrids (Pride X4004 and Pride X4053) because of compensating variations within yield components. Grain yield per panicle increased as row spacing increased but this was offset by a decrease in panicles per plant and panicles per square meter. Grain yield per panicle, panicles per plant, and panicles per square meter decreased as population density increased. The choice of row spacing and population density in field production will, therefore, depend on convenience factors related to crop management. Evapotranspiration for the growing season was 179 mm in 1973 and 204 mm in 1974. Highest water use efficiencies occurred at the low population densities and narrow row spacings. There were differences between the two hybrids. Grain yield of Pride X4004 was greater than that of Pride X4053 because the former produced a greater number of seed-bearing tillers. Grain yield differences in Pride X4004 among the three experiments were due to differences in grain yield per panicle.

scholarly journals Simulation of climate change impacts on grain sorghum production grown under free air CO2 enrichment

2016 ◽  
Vol 30 (3) ◽  
pp. 311-322 ◽  
Author(s):  
Tongcheng Fu ◽  
Jonghan Ko ◽  
Gerard W. Wall ◽  
Paul J. Pinter ◽  
Bruce A. Kimball ◽  
...  
Keyword(s):  
Climate Change ◽  
Grain Yield ◽  
Global Climate ◽  
Co2 Enrichment ◽  
Climate Change Impacts ◽  
Grain Sorghum ◽  
Free Air ◽  
Sorghum Production ◽  
Sorghum Grain ◽  
The University

Abstract Potential impacts of climate change on grain sorghum (Sorghum bicolor) productivity were investigated using the CERES-sorghum model in the Decision Support System for Agrotechnology Transfer v4.5. The model was first calibrated for a sorghum cultivar grown in a free air CO2 enrichment experiment at the University of Arizona, Maricopa, Arizona, USA in 1998. The model was then validated with an independent dataset collected in 1999. The simulated grain yield, growth, and soil water of sorghum for the both years were in statistical agreement with the corresponding measurements, respectively. Neither simulated nor measured yields responded to elevated CO2, but both were sensitive to water supply. The validated model was then applied to simulate possible effects of climate change on sorghum grain yield and water use efficiency in western North America for the years 2080-2100. The projected CO2 fertilizer effect on grain yield was dominated by the adverse effect of projected temperature increases. Therefore, temperature appears to be a dominant driver of the global climate change influencing future sorghum productivity. These results suggest that an increase in water demand for sorghum production should be anticipated in a future high-CO2 world.

scholarly journals Identification of genetic factors contributing to heterosis in a hybrid from two elite maize inbred lines using molecular markers.

Genetics ◽  
1992 ◽  
Vol 132 (3) ◽  
pp. 823-839 ◽  
Author(s):  
C W Stuber ◽  
S E Lincoln ◽  
D W Wolff ◽  
T Helentjaris ◽  
E S Lander
Keyword(s):  
Molecular Markers ◽  
Grain Yield ◽  
Interval Mapping ◽  
Inbred Lines ◽  
Hybrid Vigor ◽  
Plant Materials ◽  
G X E Interaction ◽  
Maize Inbred Lines ◽  
Improvement Programs ◽  
Analytical Approaches

Abstract The use of molecular markers to identify quantitative trait loci (QTLs) affecting agriculturally important traits has become a key approach in plant genetics-both for understanding the genetic basis of these traits and to help design novel plant improvement programs. In the study reported here, we mapped QTLs (and evaluated their phenotypic effects) associated with seven major traits (including grain yield) in a cross between two widely used elite maize inbred lines, B73 and Mo17, in order to explore two important phenomena in maize genetics-heterosis (hybrid vigor) and genotype-by-environment (G x E) interaction. We also compared two analytical approaches for identifying QTLs, the traditional single-marker method and the more recently described interval-mapping method. Phenotypic evaluations were made on 3168 plots (nearly 100,000 plants) grown in three states. Using 76 markers that represented 90-95% of the maize genome, both analytical methods showed virtually the same results in detecting QTLs affecting grain yield throughout the genome, except on chromosome 6. Fewer QTLs were detected for other quantitative traits measured. Whenever a QTL for grain yield was detected, the heterozygote had a higher phenotype than the respective homozygote (with only one exception) suggesting not only overdominance (or pseudooverdominance) but also that these detected QTLs play a significant role in heterosis. This conclusion was reinforced by a high correlation between grain yield and proportion of heterozygous markers. Although plant materials were grown and measured in six diverse environments (North Carolina, Iowa and Illinois) there was little evidence for G x E interaction for most QTLs.

Registration of N122, a Pair of A/B Grain Sorghum Parental Lines

Crop Science ◽  
1990 ◽  
Vol 30 (6) ◽  
pp. 1379-1379
Author(s):  
D. J. Andrews ◽  
B. E. Johnson ◽  
W. M. Ross
Keyword(s):  
Grain Sorghum ◽  
Parental Lines

Interference of Three Annual Grasses with Grain Sorghum (Sorghum bicolor)

1990 ◽  
Vol 4 (2) ◽  
pp. 245-249 ◽  
Author(s):  
Brenda S. Smith ◽  
Don S. Murray ◽  
J. D. Green ◽  
Wan M. Wanyahaya ◽  
David L. Weeks
Keyword(s):  
Linear Regression ◽  
Grain Yield ◽  
Field Experiments ◽  
Grain Sorghum ◽  
Grass Species ◽  
Row Spacing ◽  
Yield Data ◽  
Weed Density ◽  
Annual Grasses ◽  
Wide Row Spacing

Barnyardgrass, large crabgrass, and Texas panicum were evaluated in field experiments over 3 yr to measure their duration of interference and density on grain sorghum yield. When grain yield data were converted to a percentage of the weed-free control, linear regression predicted a 3.6% yield loss for each week of weed interference regardless of year or grass species. Grain sorghum grown in a narrow (61-cm) row spacing was affected little by full-season interference; however, in wide (91-cm) rows, interference increased as grass density increased. Data from the wide-row spacing were described by linear regression following conversion of grain yield to percentages and weed density to log10. A separate nonlinear model also was derived which could predict the effect of weed density on grain sorghum yield.

Are atheist worlds really the best?

2020 ◽  
pp. 1-14
Author(s):  
KIRK LOUGHEED
Keyword(s):  
The World ◽  
Better Than

Abstract Anti-theism is the view that God's existence would (or does) detract from the value of the world. A distinctive argument for anti-theism says that the very best atheist worlds are better than the best theist worlds. The reason for this is that it's possible to gain most or all of the benefits associated with theism in Godless worlds. For instance, worlds with a lesser god or several lesser gods can provide many of the benefits of theism without the associated disadvantages. While some work has been done to show that the advantages of theism can be had in atheist worlds, very little has been said regarding whether the disadvantages can simultaneously be avoided in such worlds. I aim to show that it is difficult to describe a possible atheist world where the benefits of theism obtain but the harms do not. I thus problematize this particular argument for anti-theism.

Sign in / Sign up

Export Citation Format

Share Document