Assessment relationship between agro-morphological traits and grain yield in bread wheat genotypes under drought stress condition

2012 ◽  
Vol 11 (35) ◽  
Author(s):  
Mehdi habibpour
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Bread Wheat ◽  
Morphological Traits ◽  
Stress Condition ◽  
Wheat Genotypes ◽  
Drought Stress Condition

scholarly journals Determination of the best indirect selection criteria in Iranian durum wheat (Triticum aestivum L.) genotypes under irrigated and drought stress conditions

Genetika ◽  
2015 ◽  
Vol 47 (2) ◽  
pp. 549-558 ◽  
Author(s):  
Ahmad Golparvar ◽  
Mohammad Gheisari ◽  
Davoud Naderi ◽  
Ali Mehrabi ◽  
Amin Hadipanah ◽  
...  
Keyword(s):  
Drought Stress ◽  
Durum Wheat ◽  
Total Variation ◽  
Seed Yield ◽  
Stress Condition ◽  
Spike Density ◽  
Plant Seed ◽  
Wheat Genotypes ◽  
Drought Stress Condition ◽  
Yield Factor

In order to evaluate and classify morphological and morpho-physiological traits of durum wheat genotypes in drought and irrigated conditions 200 durum wheat genotypes were sown in modify augmented design with four replications during 2013- 2014 farming season. Two replications were considered as drought condition and two as irrigated. Factor analysis based on principal component analysis method and varimax rotation indicated that four important factors accounted for about 87 and 92 percent of the total variation among traits in drought and irrigated conditions, respectively. In drought stress condition, the first factor assigned 37 percent of total variation between traits and was significantly related with spike yield and it?s components. Therefore, this factor was regarded as spike seed yield factor. Other factors in drought stress condition accounted for 22, 16 and 12 percent of variation between traits and were entitled as plant seed yield, spike density and assimilate transmission factors, respectively. In irrigated condition, the first factor assigned 36 percent of total variation between traits and was significantly related with traits plant and spike seed yield, plant and spike harvest index, No. seed/spike and plant height. This factor was regarded as plant seed yield factor. Other factors in irrigated condition accounted for 24, 18 and 14 percent of variation between traits and were entitled as production, assimilate transmission and spike density factors, respectively. Overall, results revealed effect of different environments on extracted factors, percent of variation accounted for by factors and traits related with each factor.

scholarly journals Evaluation of agro-morphological traits related to grain yield of Iranian wheat genotypes in drought-stress and normal irrigation conditions

2018 ◽  
Vol 12 (05) ◽  
pp. 738-748 ◽  
Author(s):  
Sayedeh Saba Bilgrami ◽  
◽  
Barat Ali Fakheri ◽  
Vahid Shariati J. ◽  
Khadijeh Razavi ◽  
...  
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Morphological Traits ◽  
Wheat Genotypes

scholarly journals Evaluation of some bread wheat genotypes popular in Saudi Arabia under drought stress

2019 ◽  
pp. 1892-1900
Author(s):  
Soleman M. Al Otayk ◽  
Abdulrahman A. AL Soqeer ◽  
Abd Elsalam M. Menshawy ◽  
Mohamed I. Motawei
Keyword(s):  
Saudi Arabia ◽  
Drought Stress ◽  
Grain Yield ◽  
Bread Wheat ◽  
Irrigation Treatment ◽  
Utilization Efficiency ◽  
Yield Potential ◽  
Irrigation Regime ◽  
Wheat Genotypes ◽  
Days To Heading

Six bread wheat genotypes were evaluated in three separate irrigation regime experiments to compare the response of agronomic performance and to identify genotypes with high yield potential under drought stress. The first irrigation treatment (I3) was given normal water irrigation (about 7000 m3 ha-1, according to recommendation for Qassim Region). The second (I2) and third (I1) treatments were given 2/3 and 1/3 of water amount of the first treatment, respectively. Factorial experiments in randomized complete block design with three replications were conducted during 2009/2010 and 2010/2011 seasons in the arid environment of central region of Saudi Arabia. Measurements were taken on days to heading, plant height, number of spikes m-2, number of kernels spike-1, 1000-kernel weight and grain yield. The drought susceptibility index (DSI) and water utilization efficiency (WUE) were calculated. The results revealed that effect of irrigation regime was highly significant for all traits, except days to heading. All studied characters were significantly decreased by reducing the amount of irrigation water. Grain yield showed maximum sensitivity as affected by moisture-stress. Means over environments indicated the existence of sufficient genetic variability among the genotypes for all the characters studied. Giza 171 recorded the highest values for most yield characters, while genotype 'Sama' was the lowest for the most yield characters. Giza 171, Sakha 93 and IC-1 recorded highest grain yield and WUE, based on average over irrigation treatments. Giza 171, Sakha 93 and IC-2 can be considered as drought stress tolerant genotypes.

scholarly journals Natural variations in the non-coding region of ZmNAC080308 contributes maintaining grain yield under drought stress in maize

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Nan Wang ◽  
Ming Cheng ◽  
Yong Chen ◽  
Bojuan Liu ◽  
Xiaonan Wang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Grain Yield ◽  
Stress Condition ◽  
Genetic Recombination ◽  
Functional Marker ◽  
Coding Region ◽  
Evolutionary Selection ◽  
Drought Stress Condition ◽  
Natural Variations

Abstract Background Natural variations derived from both evolutionary selection and genetic recombination, presume to have important functions to respond to various abiotic stresses, which could be used to improve drought tolerance via genomic selection. Results In the present study, the NAC-encoding gene of ZmNAC080308 was cloned and sequenced in 199 inbred lines in maize. Phylogenetic analysis showed that ZmNAC080308 is closely clusteredinto the same group with other well-known NAC genes responding to improve drought tolerance. In total, 86 SNPs and 47 InDels were identified in the generic region of ZmNAC080308, 19 of these variations were associated with GY (grain yield) in different environments. Nine variations in the 5’-UTR region of ZmNAC080308 are closely linked, they might regulate the gene expression and respond to improve GY under drought condition via Sp1-mediated transactivation. Two haplotypes (Hap1 and Hap2) identified in the, 5’-UTR region using the nine variations, and Hap2 containing insertion variants, exhibited 15.47 % higher GY under drought stress condition. Further, a functional marker was developed to predict the drought stress tolerance in a US maize inbred line panel. Lines carrying Hap2 exhibited > 10 % higher GY than those carrying Hap1 under drought stress condition. In Arabidopsis, overexpression ZmNAC080308 enhanced drought tolerance. Conclusions ZmNAC080308 is an important gene responding to drought tolerance, a functional marker is developed for improving maize drought tolerance by selecting this gene.

scholarly journals Evaluation of Bread Wheat (Triticum aestivum L.) Genotypes for Drought Tolerance through Selection Indices

2019 ◽  
Vol 7 ◽  
pp. 40-52
Author(s):  
Jawed Aslam Khyber ◽  
Faiza Soomro ◽  
Wahid Dino Sipio ◽  
Abdul Wahid Baloch ◽  
Jay Kumar Soothar ◽  
...  
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Grain Yield ◽  
Bread Wheat ◽  
Flag Leaf ◽  
Stress Conditions ◽  
Tolerance Index ◽  
Yield Traits ◽  
Wheat Genotypes ◽  
Drought Tolerant

The current study was planned to identify drought tolerant bread wheat genotypes based on physiological and yield traits. In this context, a set of 12 genotypes (Sarsabz, NIA-Sundar, NIA-Amber, Sassui, Khirman, Marvi-2000, NIA-Sarang, Kiran-95, NIA-Sunheri, Bhittai, Bathoor-08 and Tatara) were evaluated under normal and water stress conditions. Mean squares from analysis of variance exhibited that genotypes, treatments and genotype x treatment interaction showed significant differences (P<0.05) for majority of the studied traits, indicating that there is significant variations are existed for physio-yield traits; therefore these genotypes may be preferred for further breeding programs in respect to drought stress. Regarding reduction percentage of genotypes under drought stress against normal water conditions, the minimum reduction was observed in Bathoor-08 for spike length and flag leaf area, Kiran-95 for grain yield plant, NIA-Sundar for seed index, Marvi-2000 for relative water content, Sarsabz for grains spike, whereas maximum but desirable reduction of stomatal dimension and density was displayed by Sarsabz and Tatara under water stress conditions, respectively. On the basis of drought tolerant indices, the genotypes Kiran-95, NIA-Sundar and Sarsabz showed lower values for tolerance index (TOL), trait stability index (TSI) and stress susceptibility (SSI), nevertheless it is believed that lower values of these indices show the less reduction in yield and its related traits due to water stress conditions hence can be tagged as tolerant genotypes for drought. Correlation results revealed that MP, SSI, TOL and TSI indices were correlated with grain yield under two conditions and they can be the appropriate indices for screening wheat genotypes.

scholarly journals Correlation and Path Analysis of Yield Components in Rice (Oryza sativa L.) under Irrigated and Reproductive Stage Drought Stress Condition

2020 ◽  
pp. 60-68
Author(s):  
Sadia Perween ◽  
Anand Kumar ◽  
Fariha Adan ◽  
Jitesh Kumar ◽  
Prince Raj ◽  
...  
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Path Analysis ◽  
Stress Condition ◽  
Reproductive Stage ◽  
Yield Attributes ◽  
Drought Stress Condition ◽  
Biological Yield ◽  
Selection For ◽  
Correlation And Path Analysis

Aim: The current experiment was conducted to study correlation and path analysis among morphological traits and their contribution towards yield under irrigated and drought stress condition using forty eight diverse rice genotypes. Study Design: The experiment was studied in three replications using Randomized Block Design. Place and Duration of Study: The research was carried out during Kharif 2018 at Rice Research Farm, Bihar Agricultural University, Sabour (Bhagalpur), India. Methodology: The experiment was conducted in two different sets; irrigated and drought stress condition. The yield and yield attributes were recorded under both the conditions to conduct the correlation and path analysis. Results: The analysis of variance revealed that genotypes significantly varied in yield and yield related traits. In addition, growth and yield attributes such as effective tillers per hill, biological yield, harvest index (%) and number of fertile grains per panicle were significantly and positively correlated with grain yield per plant under irrigated as well as reproductive stage drought stress condition. It was observed that total number of grains per panicle, number of fertile grains per panicle and biological yield had high positive direct effect on grain yield per plant in both irrigated (control) as well stress condition, indicating true relationship of these characters with grain yield and direct selection for these characters will be rewarding. In rest of the characters studied, correlation was mainly due to indirect effects through component characters and hence indirect selection will lead to yield improvement in rice. Conclusion: The potential for direct and indirect selection for reproductive stage drought stress tolerance using the associated characters may be useful to the breeder to formulate appropriate breeding plans for the selection of the genotype which tolerate high temperature condition.

scholarly journals Oxidant related biochemical traits are significant indices in triticale grain yield under drought stress condition

2019 ◽  
Vol 42 (2) ◽  
pp. 111-126 ◽  
Author(s):  
Mehrnaz Riasat ◽  
Sholeh Kiani ◽  
Armin Saed-Mouchehsi ◽  
Mohamad Pessarakli
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Stress Condition ◽  
Biochemical Traits ◽  
Drought Stress Condition
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