Response to Pedigree Selection for Earliness and Grain Yield in Spring Wheat under Heat Stress

2011 ◽  
Vol 3 (3) ◽  
pp. 118-129 ◽  
Author(s):  
M.A. Ali
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Spring Wheat ◽  
Pedigree Selection ◽  
Selection For

scholarly journals Evaluation of Spring Wheat Genotypes (Triticum Aestivum L.) for Heat Stress Tolerance Using Different Stress Tolerance Indices

2015 ◽  
Vol 47 (4) ◽  
pp. 49-63 ◽  
Author(s):  
A.A. Khan ◽  
M.R. Kabir
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Stress Tolerance ◽  
Spring Wheat ◽  
Grain Filling ◽  
Filling Rate ◽  
Wheat Genotypes ◽  
Grain Filling Rate ◽  
Heat Stress Tolerance ◽  
Late Sowing

Abstract Twenty five spring wheat genotypes were evaluated for terminal heat stress tolerance in field environments in the Agro Ecological Zone-11 of Bangladesh, during 2009-2010 cropping season. The experiments were conducted at Wheat Research Centre, Bangladesh Agricultural Research Institute, using randomized block design with three replicates under non-stress (optimum sowing) and stress (late sowing) conditions. Seven selection indices for stress tolerance including mean productivity (MP), geometric mean productivity (GMP), tolerance (TOL), yield index (YI), yield stability index (YSI), stress tolerance index (STI) and stress susceptibility index (SSI) were calculated based on grain yield of wheat under optimum and late sowing conditions. The results revealed significant variations due to genotypes for all characters in two sowing conditions. Principal component analysis revealed that the first PCA explained 0.64 of the variation with MP, GMP, YI and STI. Using MP, GMP, YI and STI, the genotypes G-05 and G-22 were found to be the best genotypes with relatively high yield and suitable for both optimum and late heat stressed conditions. The indices SSI, YSI and TOL could be useful parameters in discriminating the tolerant genotypes (G-12, G-13, and G-14) that might be recommended for heat stressed conditions. It is also concluded from the present studies that biomass, grain filling rate and spikes number m-2 are suitable for selecting the best genotypes under optimum and late sowing conditions because these parameters are highly correlated with MP, GMP, YI and STI. However, high ground cover with long pre heading stage and having high grain filling rate would made a genotype tolerant to late heat to attain a high grain yield in wheat.

Realized gains from selection for spring wheat grain yield are different in conventional and organically managed systems

Euphytica ◽  
2010 ◽  
Vol 177 (2) ◽  
pp. 253-266 ◽  
Author(s):  
Todd A. Reid ◽  
Rong-Cai Yang ◽  
Donald F. Salmon ◽  
Alireza Navabi ◽  
D. Spaner
Keyword(s):  
Grain Yield ◽  
Spring Wheat ◽  
Wheat Grain ◽  
Selection For ◽  
Organically Managed

scholarly journals Fifty years of semi-dwarf spring wheat breeding at CIMMYT: Grain yield progress in optimum, drought and heat stress environments

2020 ◽  
Vol 250 ◽  
pp. 107757 ◽  
Author(s):  
Suchismita Mondal ◽  
Somak Dutta ◽  
Leonardo Crespo-Herrera ◽  
Julio Huerta-Espino ◽  
Hans J. Braun ◽  
...  
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Spring Wheat ◽  
Wheat Breeding ◽  
Stress Environments ◽  
Drought And Heat Stress

Optimal regimes of selection for grain yield and harvest index in spring wheat

Euphytica ◽  
1985 ◽  
Vol 34 (3) ◽  
pp. 625-640 ◽  
Author(s):  
F. W. Ellison ◽  
B. D. H. Latter ◽  
T. Anttonen
Keyword(s):  
Grain Yield ◽  
Spring Wheat ◽  
Harvest Index ◽  
Selection For

SELECTION FOR GRAIN YIELD OF SPRING WHEAT UTILIZING SEED SIZE AND OTHER SELECTION CRITERIA

1987 ◽  
Vol 67 (3) ◽  
pp. 605-610 ◽  
Author(s):  
H. G. NASS
Keyword(s):  
Grain Yield ◽  
Seed Size ◽  
Spring Wheat ◽  
Harvest Index ◽  
Relative Effectiveness ◽  
Triticum Aestivum L ◽  
Selection Methods ◽  
Large Seed ◽  
Study Selection ◽  
Selection For

Four selection procedures, to include random selection, visual head selection by two selectors, selection for large seed size, and harvest index, respectively, were evaluated for relative effectiveness in selecting high-yielding plants in F2 and F3 populations of three crosses of spring wheat (Triticum aestivum L.). Twenty-five F4-derived lines of the three crosses for each selection method were evaluated for yield performance during 2 yr of study. Selection for large seed size and visual head selection produced more late-heading, tall or high-yielding plants than the other selection methods. A larger number of F4-derived lines in the top yielding 5% and 25% within each cross was chosen by visual selection and by selection for large seed size.Key words: Selection methods, seed size, harvest index, grain yield, spring wheat, visual head selections

Some effects of genetic variation in drought-induced abscisic acid accumulation on the yield and water use of spring wheat

1984 ◽  
Vol 102 (2) ◽  
pp. 341-351 ◽  
Author(s):  
P. Innes ◽  
R. D. Blackwell ◽  
S. A. Quarrie
Keyword(s):  
Abscisic Acid ◽  
Grain Yield ◽  
Water Use ◽  
Spring Wheat ◽  
Field Experiments ◽  
Natural Rainfall ◽  
Additional Water ◽  
Use Efficiency ◽  
Selection For ◽  
Response To Water

SummarySelection for high-(H) and low-(L) drought-induced abscisic acid (ABA) accumulation in spring wheat was made from a cross between parents which contrasted in the character. By the F5 generation H and L selections were homozygous for ABA accumulation, which differed between the classes by 80%. The selections were evaluated in field experiments in which the amount of available water was varied.In one experiment, in which plots were automatically sheltered from rain, H selections outyielded L selections by an average 0·36 t/ha both when fully irrigated and when water was withheld between anthesis and maturity. The extra grain yield of the H selections was not produced at the expense of additional water requirement in either treatment. When water was withheld during the 4 weeks preceding anthesis, the grain yields of H and L selections were similar, but H selections used less water between 1 May and maturity. Averaged over all treatments the ratio of grain yield to water use was greater for H selections than for L selections by 0·12 t/ha/100 mm. Withholding water caused a reduction in water use and a corresponding reduction in biomass production in both sets of selections.In two trials in which plots were either irrigated weekly or received natural rainfall only, the ratio of grain yield to water use was again greater for H than for L selections, by an average 0·10 t/ha/100 mm.It is concluded that in spring wheat, selection for high levels of ABA accumulation in response to water stress may provide an opportunity of increasing grain yield and water-use efficiency.

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