Drought is one of the major abiotic stresses affecting wheat yield. A recurrent selection program was conducted to improve the drought tolerance and yield of bread wheat using drought tolerant advanced breeding lines from a drought tolerant x susceptible cross (HI 1500 x HUW 510). The parental lines were evaluated for yield, biomass and harvest index (HI) in addition to the drought adaptive tra...

Drought is the major abiotic constraint affecting peanut productivity and quality worldwide. There is a pressing need to improve the water use efficiency (WUE) of rain-fed peanut production. Breeding varieties with higher water use efficiency is seen as providing part of the solution. The objectives of this work were to (i) evaluate genetic variation in WUE, harvest index, root dry weight, spec...

Experimental plant growth regulator compounds are expected to improve wheat grain yield by extending the duration of green leaf area and altering remobilization stored carbohydrates. In order evaluate this, materials supplied a commercial third party were applied Tatonka hard red winter during mid-grain fill development stage. Overall, crop productivity increased. Compared control treatment, tw...

     It has been reported that in different regions and sowing dates, the response of crops to past climate change is not the same, due to different rates of decrease/increase in each climatic variable at different regions and months of year. This study was aimed to assess the effect of individual versus simultaneous changes in solar radiation (S), precipitation (P) and temperature (T) on rainf...

The effect of high temperatures on harvest index (HI) and morphological components that contribute to HI was investigated in two lines (Bd21 and Bd21-3) of Brachypodium distachyon, a C3 grass recognized as a tractable plant, to address critical issues associated with enhancing cereal crop yields in the presence of global climate change. The results demonstrated that temperatures ≥32 °C eliminat...

chow and Sinclair, 1991), and sunflower (Helianthus annuus L.) (Chapman et al., 1993). An approach based on a linear rate of increase in harvest index Deficiencies in the HI approach, however, may be (HI) with time after anthesis has been used as a simple means to predict grain growth and yield in many crop simulation models. When associated with use of a constant rate of HI increase applied to...

Cassava breeding is a critical aspect of sustainable agriculture to address the challenges food security and climate change. The present study aimed assess combining ability six Thai cassava elite varieties for four key traits, including fresh root yield (FRY), shoot (FSY), harvest index (HI) starch content (SC) through an analysis diallel mating design over two years. Parental lines HB80 R5 sh...

to study the tolerance of genotypes under terminal drought stress, 20 promising winter and facultative bread wheat genotypes were evaluated at karadj, ardebil, arak and hamedan agricultural research stations during 2001-02 cropping season. the experimental design in all the locations was randomized complete block of three replications. grain yield (yld), harvest index (hi), grain number per spi...