Phenological Development-Yield Relationships in Durum Wheat Cultivars under Late-Season High-Temperature Stress in a Semiarid Environment

A field study was carried out under rainfed conditions during the growing season 2008/2009 in Maru (Northern Jordan) to evaluate the phenological variation using heat-accumulated system and its relation with yield in sixteen durum wheat genotypes. Grain yield was negatively correlated with growing degree days (GDDs) to maturity, while positively correlated with GDD to heading. Increasing GDD to heading resulted in higher grain yield, while increasing grain fill duration had little effect. Rapid grain fill rate was positively correlated with grain weight and negatively correlated with grain fill duration. Waha-1, Omrabi-5, and Massara-1 genotypes had the highest grain yields among genotypes studied. These three genotypes tended to have relatively longer preheading periods with early maturity. The results of this study indicate that Mediterranean-adapted cultivars would have long preheading periods, followed by short periods and high rates of grain fill and mature early to avoid late-season drought and high-temperature stress and to attain high yields. Therefore, it is recommended for the development of high yielding wheat cultivars adapted to semiarid environments to select the genotypes with early maturity and a relatively long time to heading.

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Agronomic, physiological and molecular characterisation of rice mutants revealed the key role of reactive oxygen species and catalase in high-temperature stress tolerance

Functional Plant Biology ◽

10.1071/fp19246 ◽

2020 ◽

Vol 47 (5) ◽

pp. 440 ◽

Cited By ~ 4

Author(s):

Syed Adeel Zafar ◽

Amjad Hameed ◽

Muhammad Ashraf ◽

Abdus Salam Khan ◽

Zia-ul- Qamar ◽

...

Keyword(s):

Reactive Oxygen Species ◽

Heat Stress ◽

High Temperature ◽

Grain Yield ◽

Temperature Stress ◽

Heat Tolerance ◽

High Temperature Stress ◽

Oxygen Species ◽

Selection Indices ◽

Heat Tolerant

Climatic variations have increased the occurrence of heat stress during critical growth stages, which negatively affects grain yield in rice. Plants adapt to harsh environments, and particularly high-temperature stress, by regulating their physiological and biochemical processes, which are key tolerance mechanisms. The identification of heat-tolerant rice genotypes and reliable selection indices are crucial for rice improvement programs. Here, we evaluated the response of a rice mutant population for high-temperature stress at the seedling and reproductive stages based on agronomic, physiological and molecular indices. Estimates of variance components revealed significant differences (P < 0.001) among genotypes, treatments and their interactions for almost all traits. The principal component analysis showed significant diversity among genotypes and traits under high-temperature stress. The mutant HTT-121 was identified as the most heat-tolerant mutant with higher grain yield, panicle fertility, cell membrane thermo-stability (CMTS) and antioxidant enzyme levels under heat stress. Various seedling-based morpho-physiological traits (leaf fresh weight, relative water contents, malondialdehyde, CMTS) and biochemical traits (superoxide dismutase, catalase and hydrogen peroxide) explained variations in grain yield that could be used as selection indices for heat tolerance in rice during early growth. Notably, heat-sensitive mutants accumulated reactive oxygen species, reduced catalase activity and upregulated OsSRFP1 expression under heat stress, suggesting their key roles in regulating heat tolerance in rice. The heat-tolerant mutants identified in this study could be used in breeding programs and to develop mapping populations to unravel the underlying genetic architecture for heat-stress adaptability.

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Effect of High Temperature Stress at Anthesis on Grain Yield and Biomass of Field-grown Crops of Wheat

Annals of Botany ◽

10.1006/anbo.1998.0740 ◽

1998 ◽

Vol 82 (5) ◽

pp. 631-639 ◽

Cited By ~ 216

Author(s):

R FERRIS

Keyword(s):

High Temperature ◽

Grain Yield ◽

Temperature Stress ◽

High Temperature Stress

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Growth and yield components of wheat genotypes exposed to high temperature stress under control environment

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v34i3.3961 ◽

1970 ◽

Vol 34 (3) ◽

pp. 360-372 ◽

Cited By ~ 23

Author(s):

M Ataur Rahman ◽

Jiro Chikushi ◽

Satoshi Yoshida ◽

AJMS Karim

Keyword(s):

High Temperature ◽

Grain Yield ◽

Temperature Stress ◽

Yield Components ◽

High Temperature Stress ◽

Relative Performance ◽

Growth And Yield ◽

Wheat Genotypes ◽

Heat Susceptibility Index ◽

Green Leaf Area

High temperature stress during grain-filling period is one of the major environmental constraints limiting the grain yield of wheat in Bangladesh. Crop growth response and relative performance of yield components of ten wheat genotypes were studied in two temperature conditions in glass rooms in a Phytotron to identify the genotype tolerant to high temperature stress. A favourable day/night temperatures of 15/10, 20/15, and 25/20°C were maintained from sowing to 60 days after sowing (DAS), 61 to 80 DAS and 81 DAS to maturity, respectively, in one glass room (G1); whereas day/night temperatures in another glass room (G2) was always maintained at 5°C higher than that of G1. Green leaf area and number of tillers in different times, number of days for the occurrence of major crop growth stages, relative performance in yield components, grain yield and heat susceptibility index were estimated following the standard methods. The higher temperature enhanced plant growth, flowering, and maturation. Thus the number of days to booting, heading, anthesis, and maturity of wheat were significantly decreased that varied among the genotypes. Green leaf area and productive tillers/plant were drastically reduced in time under high temperature. The reduced number of grains/spike and smaller grain size resulted from drastic reduction in growth duration were responsible for the yield loss of wheat at high temperature. Out of ten wheat genotypes, three were characterized as high temperature tolerant based on their relative performance in yield components, grain yield and heat susceptibility index. Key Words: High-temperature tolerance, wheat genotype, growth and yield components. DOI: 10.3329/bjar.v34i3.3961 Bangladesh J. Agril. Res. 34(3) : 361-372, September 2009

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Evaluation of heat stress and leaf rust tolerance between very late planted durum and bread wheat cultivars in central India

Australian Journal of Experimental Agriculture ◽

10.1071/ea06323 ◽

2007 ◽

Vol 47 (12) ◽

pp. 1422 ◽

Cited By ~ 4

Author(s):

U. K. Behera ◽

A. N. Mishra ◽

H. N. Pandey

Keyword(s):

Heat Stress ◽

High Temperature ◽

Durum Wheat ◽

Leaf Rust ◽

Bread Wheat ◽

Cropping System ◽

Central India ◽

High Temperature Stress ◽

Wheat Cultivars ◽

Rust Infection

Soybean [Glycine max (L.) Merr.]–wheat (Triticum aestivum L.) is the common cropping system in the Vertisols of central India. High temperatures prevailing during the reproductive phase and leaf rust infection of the late-planted wheat crop affect the grain yield adversely. In the soybean–potato–wheat cropping system, which has recently become more popular, wheat is sown very late, so high temperature stress is a major concern. Understanding of the response of very late-sown durum and bread wheat to high temperature stress during grain filling will assist breeders in genotype improvement and development of best agronomic management practices for promotion of very late-sown wheat cultivation in the region. Information is lacking on the response of durum and bread wheat to leaf rust and heat stress under very late-sown situations. Field experiments were conducted for three consecutive spring (January to April) seasons, from 1996 to 1998, with 20 cultivars of durum (Triticum turgidum L. var. durum Desf.) and bread (Triticum aestivum L. emend. Fiori. and Paol.) wheat of timely and late-sown groups. The study objective was to: (i) identify durum and bread wheat cultivars suitable for very late planting in the newly established soybean–potato–wheat multiple cropping system; (ii) evaluate differential performance of durum and bread wheat under very late-sown conditions; and (iii) characterise plant traits associated with tolerance to heat stress during the grain filling period. Each year, all the cultivars were planted very late in January in lieu of normal sowing in mid-November. Compared with both the timely and late-sown groups of bread wheat cultivars, durum wheat produced an average 6% higher grain yield when sown very late. The 1000-grain weight was the most affected yield attribute under high temperature. Thus, under very late sown conditions, stable and high 1000-grain weight (45–55 g), and high harvest index (41–52%) contributed to the higher yield of durum wheat. Durum cultivar HI 8498 and bread wheat cultivars GW 173, HI 1418 and DL 788-2 of early to medium maturity and with high yields (>4.0 t/ha) and water use efficiency (12.7–14.8 kg/ha.mm) proved promising. Durum cultivars remained free from leaf rust infection, while significant yield reduction was recorded in susceptible bread wheat cultivars, particularly DL 803-3 and GW 190. This was due to severe rust infection during 1997–98, when widespread incidence of leaf rust occurred in the region. Therefore, contrary to the popular belief, late planted durum wheat may be successfully grown in the soybean–potato–wheat cropping system in central India.

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Wheat Cultivars Adapted to Post-Heading High Temperature Stress

Journal of Agronomy and Crop Science ◽

10.1111/j.1439-037x.2006.00189.x ◽

2006 ◽

Vol 192 (2) ◽

pp. 111-120 ◽

Cited By ~ 87

Author(s):

H. Tewolde ◽

C. J. Fernandez ◽

C. A. Erickson

Keyword(s):

High Temperature ◽

Temperature Stress ◽

High Temperature Stress ◽

Wheat Cultivars

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Effect Of High Temperature On Yield Attributing Traits In Bread Wheat

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v36i3.9270 ◽

1970 ◽

Vol 36 (3) ◽

pp. 415-426 ◽

Cited By ~ 3

Author(s):

Khajan Singh ◽

SN Sharma ◽

Yogendra Sharma

Keyword(s):

High Temperature ◽

Grain Yield ◽

Bread Wheat ◽

Temperature Stress ◽

Wheat Variety ◽

Triticum Aestivum L ◽

High Temperature Stress ◽

Major Constraint ◽

Biological Yield ◽

Heat Susceptibility Index

High temperature stress is major constraint to bread wheat (Triticum aestivum L. Em. Thell) production. Generation of information on the effect of high temperature stress on various traits may be helpful for developing thermotolerance bread wheat variety. An experiment was conducted on a set of 10 diverse genotypes, their 45 F1s and F2s for identification of high temperature stress genotype. The experiment was conducted under normal and late sown condition. The parent HD 2851, P8W 520, and HS 448, and the crosses HS 448 × PBW 520, UP 2614 × K 209 and PBW 520 × HD 2851 for grain yield per plant were least affected under late sown conditions. Heat stress intensity (Dvalue) clearly indicated that grain yield per pant biological yield per plant and grain yield per spike suffered revively under late sown conditions. Keywords: Bread wheat; heat susceptibility index; tolerant genotypes. DOI: http://dx.doi.org/10.3329/bjar.v36i3.9270 BJAR 2011; 36(3): 415-426

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