The values of specific heat capacity were for all studied materials very similar except for the wheat mixture axis that had the lowest specific heat capacity. This study was performed to evaluate the relationship between stem reserves as a constitutive trait and of thermotolerance to sustained wheat grain filling under heat stress. The new quantification method combining yield potential. Evaluation of a new method for quantification of heat tolerance in. Physiological traits associated with heat tolerance in bread. Mar 29, 2016 measurement of heat tolerance parameters different physiological mechanisms may contribute to heat tolerance in the field for example, heat tolerant metabolism as indicated by higher photosynthetic rates, staygreen, and membrane thermostability, or heat avoidance as indicated by canopy temperature depression. Heat stress tolerance of wheat paul telfer, james edwards, dion bennett, haydn kuchel, australian grain technologies, roseworthy sa contact. High temperature indexfor field evaluation of heat tolerance. Heat stress is a rigorous threat, particularly during reproductive and grainfilling phases, that results into yield loss. Wheat growth can be impaired by heat stress hs1 at any developmental stage, and modeling scenarios predict even warmer temperatures in the. Indian wheat cultivars are developed to suit the requirements of different agro climatic zones and represent wide variability in terms of form and characteristics. May 03, 2015 genetic improvement of wheat crop for thermotolerance would require evaluation of cultivated wheat germplasm for heat tolerance. Twenty one diverse, standard and experimental cultivars of common spring wheat triticum aestivum l.
Predicted average growing season temperatures for 2050 in each wheat megaenvironment circle color. Winter wheat has evolved adaptive mechanisms that are. Due to the complexity of heat stress tolerance, the accuracy of the information generated in the initial stage of this project is not suitable as a variety selection tool. Heat tolerance evaluation of wheat triticum aestivum l. Differential effects of a postanthesis heat stress on wheat. In this chapter, the evects of high temperature on. Success in crop improvement generally depends on the magnitude of genetic. The effect of moisture on the specific heat capacity was quite remarkable, which is a consequence of the high specific heat capacity of water.
Vikas gupta, chandra nath mishra and satish kumar indian institute of wheat and barley research, karnal2001 haryana wheat is the second most important winter cereal after rice. There is a great need to identify genetic diversity for high temperature heat tolerance and better understand the combination of traits. Oct 23, 2014 physiological traits associated with heat tolerance in bread wheat triticum aestivum l. The soil at tel hadya is fine clay, thermic, chromic calcixererts, merging into a.
Wheat triticum aestivum represents about 30% of the worlds cereal area, with over 220 million ha cultivated worldwide, often under abiotic stress. Heat tolerance is a desirable trait for wheat in the subtropics and in traditional wheat areas under threat from global warming, where the crop may also be exposed to boron b deficiency. Heat tolerance wheat varietal differences and improved. Heat tolerance thus should be essential characteristic of wheat cultivars to be developed. Heat and drought tolerance in wheat semantic scholar. Germplasm evaluation of heat tolerance in bread wheat in tel. Heat stress causes an abrupt increase in the expression of stressassociated proteins which provide tolerance by stimulating the defense response in plants. Transitory or constantly high temperatures cause an array of morphoanatomical, physiological and biochemical changes in plants, which affect plant growth and development and may lead to a drastic reduction in economic yield. Evaluating wheat genotypes using different stress tolerance indices 49 cercetari agronomice in moldova vol. Breeding wheat for heat tolerance requires a sufficient information about the genetic diversity in the gene pool of wheat and appropriate laboratory methods to screen wheat germplasms for heat tolerance. Genomewide analysis of the hsp101clpb gene family for heat tolerance in hexaploid wheat article pdf available in scientific reports 101. Aa khan, akm shamsuddin, ncd barma, mk alam and ma alam wheat research centre, bangladesh agricultural research institute, gazipur1701, bangladesh accepted.
Pdf since the beginning of the century, ambient temperatures have increased. Pdf heat tolerance of maize with reference of some. Genetic enhancement for heat stress tolerance through integration of novels tools and techniques highthroughput precision phenotyping genomewide association study gwas rapidcycle genomic selection rcgs double haploid dh root phenotyping lipidomics heat stress tolerant maize for asia htma. Since the beginning of the century, ambient temperatures have increased and are predicted to rise further under climate change. Hti and temperature difference control for quantifying wheat heat tolerance that included the yield potential and the stability. High temperatures andor heat shock experienced during critical growth stages of anthesis and grain filling is extremely detrimental to a wheat plant. This response to heat stress was genotypedependent, with most analyzed metabolites increased in cv primadur high in seed carotenoids, and decreased in cv t3 high in seed anthocyanin. Mapping qtl for the traits associated with heat tolerance in. Improving heat tolerance in wheat is major goal for wheat breeder and morphophysiological traits in plants are affected by heat stress n achit et al. Physiological traits for improving heat tolerance in wheat. Overexpression of mir159 led to the downregulation of its target gamyb and to decrease plant heat tolerance in wheat 14.
Genomewide analysis of long noncoding rnas unveils the. Heat stress due to increased temperature is an agricultural problem in many areas in the world. Heat stress responses in a large set of winter wheat cultivars plos. However, there is only one report of metabolic profiling of heat stress tolerance in wheat. Pdf physiological traits for improving heat tolerance in.
Pdf breeding for heat tolerance in wheat nabin bhusal. Economic importance and taxonomy of the wheat wheat triticum aestivum l. Mamrutha, ratan tiwari, sindhu sareen, shrutkirti bhatia, priyanka siwach, vinod tiwari, and indu sharma. Active ingredients saflufenacil group 14 formulation waterbased suspension concentrate one case contains 1.
Breeding for heat tolerance in bread wheat triticum aestivum l. Red numbers show average growing season temperatures above 18. Assessing genetic variation for heat tolerance in synthetic wheat lines using phenotypic data and molecular markers pradeep sharma 1, sindhu sareen2, manoj saini, ajay verma3, bhudev singh tyagi2, indu sharma1,2 1plant biotechnology, directorate of wheat research, karnal 2001, haryana, india. Screening wheat germplasm for heat tolerance at terminal. Terminal heat stress is a common abiotic factor for reducing the yield in certain areas of west asia and north africa ferrera et al. It is the most important staple food of about two billion people 36% of the world population. Studies to improve wheat for high temperature stress areas. Mechanism, impact and quantitative trait loci associated with heat. Developing heat tolerant cultivars has become a principal breeding goal in the southern and central great plain areas of the usa. Drought and heat stress cause losses in wheat productivity in major. Stay green is a trait that has been used to indicate heat tolerance in hot environment acevedo et al. Identification of drought, heat, and combined drought and.
In addition to the grain yield plant breeders should also include sod, pod, psr and msi as markers in the breeding program for development of heat tolerant wheat cultivars. This looks and tastes like a classic hefe, but in the mouth the spices and cloves penetrate yet stay balanced. A field experiment was conducted with four wheat varieties raj44, hd2733, nw 1014 and k9006 for characterization of heat stress tolerance traits under heat stress condition. Heat tolerance of maize with reference of some physiological characteristics. Assessing genetic variation for heat tolerance in synthetic. Pdf analysis of heat stress tolerance in winter wheat. In this study, a proteomic method, tags for relative and absolute. Breeding wheat for high temperature tolerance authorstream. Heat tolerance for yield and its components in different. Considering the scenario, breeding wheat genotypes for heat tolerance both. These genomic regions might have certain genes which could be manipulated by wheat breeders to improve heat tolerance in our study, five genomic regions 6a, 7a, 1b, 2b and 1d were significantly associated with traits related to heat tolerance. Breeding for heat tolerance in wheat biotech articles. Harvest aid and desiccant for the ultimate crop and broadleaf weed dry down.
Pdf breeding for heat tolerance in wheat researchgate. Heat tolerance was estimated for each variable by the heat susceptibility. The screening of varieties has identified significant variation for heat stress tolerance. Differential effects of a postanthesis heat stress on. Heat stress, a major abiotic stressor of wheat triticum aestivum l. First released as in heat wheat, i think flying dog should change the label, too. Heat stress in wheat during reproductive and grainfilling phases. Heat stress was induced by delayed sowing of 35 days from normal date of sowing so that grain filling stage of wheat could experience severe heat stress. Traits associated with high temperature tolerance can be used to develop heat tolerant cultivars in wheat. High temperature heat stress during grain filling is a major problem in most of the wheat growing areas. To clarify the effects of these two aspects of heat stress, systematic. Pdf breeding for heat tolerance in wheat sindhu sareen. Basics of cold tolerance and winter survival in winter wheat david struthers, winter cereals canada inc. Significant variation was seen among cultivars in the reduction in grain weight per ear rgw, kernel number, and single kernel.
Mechanisms of heat tolerance in crop plants request pdf. Analysis of heat stress tolerance in winter wheat article pdf available in acta agronomica hungarica 574. Jun 14, 2017 heat stress, a major abiotic stressor of wheat triticum aestivum l. Focus less on the weird artwork as the point is for normal people to enjoy wheat beers as a summer option.
1348 1471 228 1057 799 562 1001 147 1221 402 354 852 1179 869 1443 1230 174 242 391 410 313 19 491 384 800 836 348 312 1488 306 515 985 1318 1214 1088 1017 500 1251 180