scholarly journals Grain yield stability of wheat genotypes under irrigated and non-irrigated conditions

2005 ◽  
Vol 48 (5) ◽  
pp. 697-704 ◽  
Author(s):  
Lauro Akio Okuyama ◽  
Luiz Carlos Federizzi ◽  
José Fernandes Barbosa Neto
Keyword(s):  
Grain Yield ◽  
Stress Condition ◽  
Linear Regression Method ◽  
Genotype By Environment Interactions ◽  
Wheat Genotypes ◽  
Genotype By Environment ◽  
Sowing Dates ◽  
Water Stress Condition ◽  
The Stability ◽  
Late Sowing

Analyses of genotype by environment interactions were carried out for wheat genotypes grown under irrigated and non-irrigated field conditions, in two sowing dates during three years. The linear regression method was used to analyze the stability of grain yield. Genotype by environment interactions was observed for grain yield in all groups of environments. Nesser was the most productive and stable genotype in all groups of environments, followed by IAPAR 17-Caeté. In the late sowing, better yield performances were observed for the cultivars OCEPAR 7-Batuíra, IAPAR 17-Caeté and Nesser, under irrigated condition, and Nesser and IAPAR 28-Igapó, under non-irrigated condition. The results indicated that Nesser gave high grain yield with superior adaptability and stability, and could thus be considered as the most suitable genotype for late sowing and water stress condition at the end of plant cycle.

scholarly journals Effect of Date of Sowing on the Performance of Drought Tolerant Wheat Genotypes to Spot Blotch at Rampur, Chitwan , Nepal

2013 ◽  
Vol 1 (4) ◽  
pp. 266-271
Author(s):  
L. Aryal ◽  
S. M. Shrestha ◽  
G. B. K.C.
Keyword(s):  
Field Experiment ◽  
Grain Yield ◽  
Spot Blotch ◽  
Kernel Weight ◽  
Wheat Genotypes ◽  
Drought Tolerant ◽  
Sowing Dates ◽  
Main Factors ◽  
Late Sowing ◽  
Plot Design

A research was conducted in field to elucidate the response of 20 twenty drought tolerant wheat genotypes to spot blotch. Field experiment was carried out in Agronomy block of IAAS, Rampur, Chitwan in split plot design with three replications, considering 25 November as normal sowing and 15 December as late sowing dates taking them as main factors and genotypes as sub factors. Grain yield was 2.50 t ha-1 on 25 November sowing and 2.03 t ha-1 on 15 December sowing. Similarly thousand kernel weight was 37.50 g on 25 November sowing and 32.82 g on 15 December sowing.  Aditya, CSISA DRYT 5204 and CSISA DRYT 5205 had less than 13% grain yield and TKW reduction when sown in late condition also. From the experiment it is concluded that these three genotypes can be sown in late condition as they were resistant to spot blotch and heat stress.DOI: http://dx.doi.org/10.3126/ijasbt.v1i4.9180 Int J Appl Sci Biotechnol, Vol. 1(4): 266-271

scholarly journals Genotype by environment interactions (GEIs) for barley grain yield under salt stress condition

2017 ◽  
Vol 20 (3) ◽  
pp. 193-204 ◽  
Author(s):  
Ammar Elakhdar ◽  
Toshihiro Kumamaru ◽  
Kevin P. Smith ◽  
Robert S. Brueggeman ◽  
Ludovic J.A. Capo-chichi ◽  
...  
Keyword(s):  
Salt Stress ◽  
Grain Yield ◽  
Stress Condition ◽  
Barley Grain ◽  
Genotype By Environment Interactions ◽  
Salt Stress Condition ◽  
Genotype By Environment

scholarly journals Thermal Imaging Reliability for Estimating Grain Yield and Carbon Isotope Discrimination in Wheat Genotypes: Importance of the Environmental Conditions

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2676 ◽  
Author(s):  
Sebastián Romero-Bravo ◽  
Ana María Méndez-Espinoza ◽  
Miguel Garriga ◽  
Félix Estrada ◽  
Alejandro Escobar ◽  
...  
Keyword(s):  
Grain Yield ◽  
Thermal Imaging ◽  
Mediterranean Climate ◽  
Vapor Pressure Deficit ◽  
Stress Condition ◽  
Water Status ◽  
Canopy Temperature ◽  
Spring Bread Wheat ◽  
Wheat Genotypes ◽  
The Relationship

Canopy temperature (Tc) by thermal imaging is a useful tool to study plant water status and estimate other crop traits. This work seeks to estimate grain yield (GY) and carbon discrimination (Δ13C) from stress degree day (SDD = Tc − air temperature, Ta), considering the effect of a number of environmental variables such as the averages of the maximum vapor pressure deficit (VPDmax) and the ambient temperature (Tmax), and the soil water content (SWC). For this, a set of 384 and a subset of 16 genotypes of spring bread wheat were evaluated in two Mediterranean-climate sites under water stress (WS) and full irrigation (FI) conditions, in 2011 and 2012, and 2014 and 2015, respectively. The relationship between the GY of the 384 wheat genotypes and SDD was negative and highly significant in 2011 (r2 = 0.52 to 0.68), but not significant in 2012 (r2 = 0.03 to 0.12). Under WS, the average GY, Δ13C, and SDD of wheat genotypes growing in ten environments were more associated with changes in VPDmax and Tmax than with the SWC. Therefore, the amount of water available to the plant is not enough information to assume that a particular genotype is experiencing a stress condition.

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.

scholarly journals Effect of Terminal High Temperature Imposed by Late Sowing on Phenological Traits of Wheat

2015 ◽  
Vol 18 (1) ◽  
pp. 13-25
Author(s):  
M Ilias Hossain ◽  
MRI Mondal ◽  
MJ Islam ◽  
MA Hakim ◽  
MK Sultan
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Grain Yield ◽  
Stress Condition ◽  
High Temperature Stress ◽  
Yield Reduction ◽  
Stressed Condition ◽  
New Varieties ◽  
Heat Stress Condition ◽  
Late Sowing

Phenological performance in relation to yield of wheat genotypes; BARI Gom 26, BAW 1051, BARI Gom 27 and BARI Gom 28 were evaluated under normal and heat stress environments. One irrigated timely sowing (ITS) and three irrigated late sowings (ILS) were imposed to provide terminal high temperature over the tested genotypes. The ITS was November 25 and three ILS were December 10, December 25 and January 10. In heat stress condition, the genotypes phased a significant level of high temperature stress which affected on phenological stage and yield compared to ITS. In ITS situation, days to anthesis and booting decreased in heat stress condition regardless the cultivars. The phenological characteristics under heat stressed condition led the wheat cultivars to significantly lower grain yield as compared to normal condition. In heat stress situations (Dec 10–Jan 10), the average grain yield was reduced by12.8 -39.8 % in BARI Gom 26, 14.4-29.7% in BAW 1051, 11.5-26.5% in BARI Gom 27 and 17.4-25.6 % in BARI Gom 28 in both the season. It was also observed that grain yield was found to be reduced by about 7.7-15.4% in BARI Gom 26, 9.4-15.7 % in BAW 1051, 9.4-12.4% in BARI Gom 27 and 9.7-12.0% in BARI Gom 28 from ITS for each 1°C rise in average mean air temperature during booting to maturity. On the other hand, reduction percent were less for the new varieties. Grain yield reduction was about 1.4 - 2.65% in BARI Gom 28, 0.1-6.7 % in BARI Gom 27 and 1.7-6.0% in BAW 1051.Bangladesh Agron. J. 2015, 18(1): 13-25

scholarly journals Sowing Dates and Soybean Cultivars Influence Seed Yield, Oil and Protein Contents in Subtropical Environment

2017 ◽  
Vol 9 (6) ◽  
pp. 188 ◽  
Author(s):  
Clovis Pierozan Junior ◽  
Jackson Kawakami ◽  
Kélin Schwarz ◽  
Renan Caldas Umburanas ◽  
Murilo Viotto Del Conte ◽  
...  
Keyword(s):  
Grain Yield ◽  
Protein Content ◽  
Management Practice ◽  
Plant Morphology ◽  
High Mass ◽  
Environment Interaction ◽  
Soybean Cultivars ◽  
Sowing Dates ◽  
Late Sowing ◽  
Subtropical Environment

The sowing date is the crop management practice with higher interference on soybean grain yield, although this interference is dependent on the genotype by environment interaction. This study was carried out to evaluate how soybean genotypes behave at different sowing times in a subtropical environment. We evaluated the grain yield, yield components, plant morphology and grain oil and protein content of four soybean cultivars (FPS Urano RR, BMX Apolo RR, BMX Energia RR and BRS 284) at three sowing dates (early, mid, and late sowing in 2010/2011 season) in Mid-South of Parana State, Brazil. Early cultivars at late sowing may have problems with mechanical harvest. The number of pods and grains differed among cultivars, and the cultivar “BRS 284” showed the best results. As an exception, the cultivar “BRS 284” showed yield stability among sowing dates. Higher amount of grain protein content occurs in middle and late sowing dates. The grain yield decreased with delay of sowing due to the reduction of the grains mass and in Southern Brazil is very important to assure high mass of seed to obtain high grain yields.

scholarly journals Evaluation of Early Seedling, Root and Grain Yield Components of Spring Wheat Genotypes in Two Sowing Dates

2018 ◽  
Vol 17 (4) ◽  
pp. 191-197
Author(s):  
Ankit Ojha ◽  
Madhav Prasad Pan ◽  
Dhruba Bahadur Th ◽  
Bishnu Raj Ojha ◽  
Raju Kharel
Keyword(s):  
Grain Yield ◽  
Spring Wheat ◽  
Yield Components ◽  
Wheat Genotypes ◽  
Seedling Root ◽  
Sowing Dates ◽  
Early Seedling ◽  
Grain Yield Components
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