scholarly journals Combining ability for yield and it’s contributing traits in wheat under heat stress condition (Triticum aestivum L.)

2020 ◽  
Vol 8 (6) ◽  
pp. 954-957
Author(s):  
HJ Bhalerao ◽  
Swati Bharad ◽  
NR Potdukhe ◽  
SD Tayade
Keyword(s):  
Triticum Aestivum ◽  
Heat Stress ◽  
Combining Ability ◽  
Stress Condition ◽  
Triticum Aestivum L ◽  
Heat Stress Condition

Morpho-Physiologi cal and biochemical characteristics of wheat (Triticum aestivum l.) Varieties under heat stress condition

2018 ◽  
Vol 18 (2) ◽  
pp. 195
Author(s):  
Amit Kumar ◽  
Sachin Sharma ◽  
Karuna Giri ◽  
Aakansha Goswami ◽  
Bhakti Chaudhary ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Heat Stress ◽  
Stress Condition ◽  
Triticum Aestivum L ◽  
Biochemical Characteristics ◽  
Heat Stress Condition

scholarly journals Accumulated Heat Unit and Phenology of Wheat Cultivars as Influenced by Late Sowing Heat Stress Condition

1970 ◽  
pp. 59-64 ◽  
Author(s):  
S Sikder
Keyword(s):  
Heat Stress ◽  
Stress Condition ◽  
Triticum Aestivum L ◽  
Wheat Cultivars ◽  
Phenological Stages ◽  
Heat Unit ◽  
Key Words Wheat ◽  
Heat Stress Condition ◽  
Heat Tolerant ◽  
Late Sowing

Accumulated heat unit and phenology of wheat (Triticum aestivum L.) cultivars were studied under normal and late sowing heat stress conditions by seeding them on November 30 and December 30, 2006. November 30 sowing was considered as normal sowing condition, whereas December 30 sowing was regarded as late sowing heat stress condition. Four heat tolerant wheat cultivars, Gourab, Sourav, Kanchan and Shatabdi and two heat sensitive cultivars, Sonora and Kalyansona were used as study materials. The results indicated that the number of days required to attain different phenological stages with late growing condition. For all the phenological stages plants of normal sowing condition needed higher heat units than the late sowing condition. At the earlier phenological stages phenothermal indices decreased with late sowing compared to normal sowing but increased at the later stages. At normal sowing condition all the cultivars showed higher heat use efficiencies compared to late sowing condition. The heat tolerant cultivars, Gourab, Sourav, Kanchan and Shatabdi exihited better performance in phenology, growing degree day, helio-thermal unit and finally used heat more efficiently than the heat sensitive cultivars, Sonora and Kalyansona. Key words: Wheat, phenology and heat use efficiency. DOI: 10.3329/jard.v7i1.4422 J Agric Rural Dev 7(1&2), 57-64, June 2009

scholarly journals Variability, Correlation and Path Coefficient Analysis for Agro-morphological Traits in Wheat Genotypes (Triticum aestivum L.) under Normal and Heat Stress Conditions

2021 ◽  
Vol 9 (1) ◽  
pp. 65-74
Author(s):  
Mukti Ram Poudel ◽  
Padam Bahadur Poudel ◽  
Ramesh Raj Puri ◽  
Hema Kumari Paudel
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Direct Effect ◽  
Morphological Traits ◽  
Stress Condition ◽  
Triticum Aestivum L ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Heat Stress Condition ◽  
Positive Direct

Assessment of variability and traits association in crop help to enhance selection efficiency. Therefore, the present investigation entitled “Variability, Correlation and Path Coefficient Analysis for Agro-morphological Traits in Wheat Genotypes (Triticum aestivum L.) under Normal and Heat Stress Conditions” was carried out during winterseason of 2019/2020 at Institute of Agriculture and Animal Science (IAAS), Bhairahawa, Nepal to identify traits that highly contribute to grain yield and suitable for its further improvement. The experiment was laid out following alpha lattice design with two replications. The twentygenotypes of wheat was sown in two different environments viz., irrigated and heat stress in November 29, 2019 and December 25, 2019 respectively. It was found that under normal condition, moderate GCV and PCV were recorded in SW, TGW, NGPS, and WGPS. Under heat stress condition, high GCV and PCV were observed in GY. High heritability and high GAM was observed in TGW & GY, NGPS, WGPS, TGW under normal and heat stress condition respectively. Under normal condition SW exhibited positive correlation and high positive direct effect on GY at genetic level and WGPS at phenotypic level. And under heat stress condition SW exhibited positive correlation and high positive direct effect on GY. Whereas, at phenotypic level, WGPS and PH exhibited high positive direct effect on grain yield. Hence it is clear that spike weight and weight of grains per spike are important traits for grain yield improvement. Int. J. Appl. Sci. Biotechnol. Vol 9(1): 65-74

scholarly journals Heat-tolerant hot pepper exhibits constant photosynthesis via increased transpiration rate, high proline content and fast recovery in heat stress condition

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sherzod Nigmatullayevich Rajametov ◽  
Eun Young Yang ◽  
Myeong Cheoul Cho ◽  
Soo Young Chae ◽  
Hyo Bong Jeong ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Heat Stress ◽  
Heat Tolerance ◽  
Transpiration Rate ◽  
Stress Condition ◽  
Proline Content ◽  
Hot Pepper ◽  
Fast Recovery ◽  
Heat Stress Condition ◽  
Heat Tolerant

AbstractUnderstanding the mechanism for heat tolerance is important for the hot pepper breeding program to develop heat-tolerant cultivars in changing climate. This study was conducted to investigate physiological and biochemical parameters related to heat tolerance and to determine leaf heat damage levels critical for selecting heat-tolerant genotypes. Seedlings of two commercial cultivars, heat-tolerant ‘NW Bigarim’ (NB) and susceptible ‘Chyung Yang’ (CY), were grown in 42 °C for ten days. Photosynthesis, electrolyte conductivity, proline content were measured among seedlings during heat treatment. Photosynthetic rate was significantly reduced in ‘CY’ but not in ‘NB’ seedlings in 42 °C. Stomatal conductivity and transpiration rate was significantly higher in ‘NB’ than ‘CY’. Proline content was also significantly higher in ‘NB’. After heat treatment, leaf heat damages were determined as 0, 25, 50 and 75% and plants with different leaf heat damages were moved to a glasshouse (30–32/22–24 °C in day/night). The growth and developmental parameters were investigated until 70 days. ‘NB’ was significantly affected by leaf heat damages only in fruit yield while ‘CY’ was in fruit set, number and yield. ‘NB’ showed fast recovery after heat stress compared to ‘CY’. These results suggest that constant photosynthetic rate via increased transpiration rate as well as high proline content in heat stress condition confer faster recovery from heat damage of heat-tolerant cultivars in seedlings stages.

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