The reliability of standard meteorological drought indices based on measurements of precipitation is limited by the spatial distribution and quality of currently available rainfall data. Furthermore, they reflect only one component of the surface hydrologic cycle, and they cannot readily capture nonprecipitation-based moisture inputs to the land surface system (e.g., irrigation) that may temper...

this experiment was conducted to evaluate the drought tolerance of cultivated (carthamus tinctorius l.) and wild safflower (c. oxyacanthus bieb) populations at research farm of college of agriculture, isfahan university of technology located at lavark-najafabad in 2008. a randomized complete block design with 3 replications was used in each of irrigation levels after 80, 130 and 180 mm evaporat...

The present research aims to study the association and allelic diversity of linked microsatellite markers to grain quality QTLs of 84 exotic rice genotypes. To this end, 9 microsatellite markers (RM540, RM539, RM587, RM527, RM216, RM467, RM3188, RM246, RM5461) were used in which a total of 61 alleles were identified with a mean of 6 alleles per locus. The polymorphism information content (PIC) ...

there are some computer programs to calculate germination related traits such as germin which have using problems. the aim of this work was to adjust germin for calculating germination related traits. seed aging effects on the seedling emergence was modeled using the optimized germin. this study was conducted based on completely randomized design in a factorial combination of five seeds aging t...

since the emergence of human civilization, drought has had extreme and sometimes catastrophic effects on human livelihoods. although drought itself is not a disaster, its impact on people and the environment may sometimes yield disastrous consequences; so a primary requirement is to better understand the natural and social dimensions associated with drought (wilhite 2000).  given that drought i...

Sustainable crop production is the major challenge in the current global climate change scenario. Drought stress is one of the most critical abiotic factors which negatively impact crop productivity. In recent years, knowledge about molecular regulation has been generated to understand drought stress responses. For example, information obtained by transcriptome analysis has enhanced our knowled...

Abstract Drought is known as a “creeping disaster” because drought impacts are usually noticed months or years after begins. In the Pacific Island Countries and Territories (PICTs), there almost no ability to tell when will begin end, especially for droughts other than meteorological droughts. Monitoring, forecasting managing in PICTs complex due variety of different ways occur, diverse direct ...

Droughts have more impact on crops than any other natural disaster. Therefore, drought risk assessments, especially quantitative are significant in order to understand and reduce the negative impacts associated with droughts, a assessment includes estimating probability consequences of hazards. In achieve this goal, we built model based three-dimensional (3D) Copula function for proportion affe...