Abu Hasan

in boro season during December 2016 to June 2017 to find out the effect of salinity on yield and yield attributes of rice varieties. Seven rice varieties (Pokkali, BRRI dhan28, BRRI dhan47, BRRI dhan61, BRRI dhan74, Binadhan-8 and Binadhan-10) and three salinity levels viz., control (no salinity), moderate salinity (8 dSm-1) and strong salinity (12 dSm-1) were assigned in two factors completely randomized design with 3 replications. Number of tillers hill-1 , number of panicles hill-1 , panicle length, grains panicle-1 , grain weight hill-1 , 1000 grain weight and straw weight hill-1 were significantly reduced with the increase in salinity levels in all rice varieties by different degree. In response to yield performance, Binadhan-8, Binadhan-10 and BRRI dhan74 were found as tolerant, Pokkali and BRRI dhan47 as moderate tolerant and BRRI dhan28 and BRRI dhan61 as susceptible up to a certain salinity level.

Response of chickpea to gibberellic acid (GA3) regarding morpho-physiology and yield was investigated in this experiment. The experiment consisted of two factors: a) two growing conditions viz.; control and foliar application of GA3 and b) four chickpea varieties viz.; Deshi, BARI Chola-3, BARI Chola-5 and BARI Chola-9. The experiment was laid out in Randomized Complete Block Design with three replications. Plant height, leaf dry weight and shoot and root dry weight plant at different days after sowing maintained a typical sigmoid pattern in all chickpea varieties under both control and GA3 applied condition. The percentage of increasing in maximum plant height, leaf dry weight plant, shoot dry weight plant and root dry weight plant were 6.21%, 9.59%, 12.00% and 9.05% in Deshi variety; 4.54%, 3.06%, 4.89% and 4.76% in BARI Chola-3; 5.21%, 9.28%, 8.25% and 10.07% in BARI Chola-5 and 8.31%, 13.44%, 9.80% and 9.58% in BARI Chola-9, respectively under foliar application of GA3. The comb...

Four wheat variety/genotype (BARI Gom-26, BAW-1202, BAW-1182 and BARI Gom-27) were tested under three heat stress regimes (normal, moderate and severe) to evaluate the effect of late seeding warmer condition on phenology and yield of wheat, as well as to identify suitable cultivars to develop heat-tolerant genotypes at Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during November, 2016 to April, 2017. Results revealed that genotype BAW-1182 and BAW-1202 showed greater thermostability of cell membrane with acceptable yield performance under heat stress condition. The order of tolerance based on heat susceptibility index (based on grain yield) was BAW-1182>BAW-1202>BARI Gom-27>BARI Gom-26 under heat stress conditions. Thus, BAW-1182 and BAW-1202 have the greatest potential to be used as high-yielding wheat genotypes under warm to hot environments and could be used in a breeding programme to develop heat-tolerant wheat. Bangladesh Agron. J. 2021, 24(...

Wheat genotypes were evaluated for salt stress at early seedling stage (solution culture) and maturity (pot culture) at Crop Physiology and Ecology Laboratory, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh. Shoot length, root length, root to shoot length ratio and seedling dry weight of 15 days old seedlings were found to be reduced at 12 dS m salinity level compared to control condition. Based on seedling dry weight Shatabdi, BARI Gom 25, BARI Gom 26, BAW 1111, BAW 1146, BAW 1154 and BAW 1156 were identified as salt tolerant (STI = >0.70); BAW 1130, BAW 1135 and BAW 1142 were salt sensitive (STI = <0.60) and other ten were screened as moderately salt tolerant (STI = 0.60 to 0.70) wheat genotypes. Out of twenty genotypes, two salt tolerant (Shatabdi and BARI Gom 25) and two salt sensitive (BAW 1130 and BAW 1142) wheat genotypes were grown in pot irrigated with three levels of saline water (control, 6 dS m and 12 dS m). Salt tolerant wheat genoty...

in boro season during December 2016 to June 2017 to find out the effect of salinity on yield and yield attributes of rice varieties. Seven rice varieties (Pokkali, BRRI dhan28, BRRI dhan47, BRRI dhan61, BRRI dhan74, Binadhan-8 and Binadhan-10) and three salinity levels viz., control (no salinity), moderate salinity (8 dSm-1) and strong salinity (12 dSm-1) were assigned in two factors completely randomized design with 3 replications. Number of tillers hill-1 , number of panicles hill-1 , panicle length, grains panicle-1 , grain weight hill-1 , 1000 grain weight and straw weight hill-1 were significantly reduced with the increase in salinity levels in all rice varieties by different degree. In response to yield performance, Binadhan-8, Binadhan-10 and BRRI dhan74 were found as tolerant, Pokkali and BRRI dhan47 as moderate tolerant and BRRI dhan28 and BRRI dhan61 as susceptible up to a certain salinity level.

to evaluate their yield performance in following season. The experiment was conducted following two factor randomized complete block design with three replications. One factor consisted of two sources of seed-i) Seeds obtained from parent plant with normal growing temperature (sowing on November 30) and ii) Seeds obtained from parent plant with high growing temperature (sowing on December 30). Another factor consisted of four wheat genotypes (BARI Gom 27, E 22, BARI Gom 30 and BARI Gom 26). Seed obtained from parent plant with normal growing temperature provided better grain and above ground biological yield (221 and 864 g m-2 , respectively) than seed obtained from parent plant with high growing temperature (191 and 752 g m-2 , correspondingly) in the succeeding season. Relative value based on grain yield indicated that seed of BARI Gom 26 obtained from parent plant with high growing temperature performed better (93%) in next growing season than the seed of BARI Gom 27 (85%), E 22 (81%) and BARI Gom 30 (85%) obtained from parent plant with high growing temperature.

Four wheat variety/genotype (BARI Gom-26, BAW-1202, BAW-1182 and BARI Gom-27) were tested under three heat stress regimes (normal, moderate and severe) to evaluate the effect of late seeding warmer condition on phenology and yield of wheat, as well as to identify suitable cultivars to develop heat-tolerant genotypes at Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during November, 2016 to April, 2017. Results revealed that genotype BAW-1182 and BAW-1202 showed greater thermostability of cell membrane with acceptable yield performance under heat stress condition. The order of tolerance based on heat susceptibility index (based on grain yield) was BAW-1182>BAW-1202>BARI Gom-27>BARI Gom-26 under heat stress conditions. Thus, BAW-1182 and BAW-1202 have the greatest potential to be used as high-yielding wheat genotypes under warm to hot environments and could be used in a breeding programme to develop heattolerant wheat.

Four wheat variety/genotype (BARI Gom-26, BAW-1202, BAW-1182 and BARI Gom-27) were tested under three heat stress regimes (normal, moderate and severe) to evaluate the effect of late seeding warmer condition on phenology and yield of wheat, as well as to identify suitable cultivars to develop heat-tolerant genotypes at Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during November, 2016 to April, 2017. Results revealed that genotype BAW-1182 and BAW-1202 showed greater thermostability of cell membrane with acceptable yield performance under heat stress condition. The order of tolerance based on heat susceptibility index (based on grain yield) was BAW-1182>BAW-1202>BARI Gom-27>BARI Gom-26 under heat stress conditions. Thus, BAW-1182 and BAW-1202 have the greatest potential to be used as high-yielding wheat genotypes under warm to hot environments and could be used in a breeding programme to develop heattolerant wheat.

in boro season during December 2016 to June 2017 to find out the effect of salinity on yield and yield attributes of rice varieties. Seven rice varieties (Pokkali, BRRI dhan28, BRRI dhan47, BRRI dhan61, BRRI dhan74, Binadhan-8 and Binadhan-10) and three salinity levels viz., control (no salinity), moderate salinity (8 dSm-1) and strong salinity (12 dSm-1) were assigned in two factors completely randomized design with 3 replications. Number of tillers hill-1 , number of panicles hill-1 , panicle length, grains panicle-1 , grain weight hill-1 , 1000 grain weight and straw weight hill-1 were significantly reduced with the increase in salinity levels in all rice varieties by different degree. In response to yield performance, Binadhan-8, Binadhan-10 and BRRI dhan74 were found as tolerant, Pokkali and BRRI dhan47 as moderate tolerant and BRRI dhan28 and BRRI dhan61 as susceptible up to a certain salinity level.

To identify comparatively drought tolerant varieties, four prominent hybrid maize were evaluated for their morpho-physiological and yield responses to water deficit stress (WDS). The experiment consisted of two factors and was laid out in a split plot design with three replications. Water application (well water and water stress) were applied as the main plot treatments and four maize varieties (BARI hybrid maize-7, BARI hybrid maize-9, BARI hybrid maize-13 and BARI hybrid maize-15) were split as sub plot treatments. The interaction effect of water regimes and maize varieties significantly influenced morpho-physiological characters as well as yield traits of maize and WDS reduced all the investigated traits by different magnitude. Among four hybrids, BARI hybrid maize-15 showed better performance in terms of morphological and yield contributing traits except cob diameter, whereas BARI hybrid maize-9 showed the lowest performances under WDS. BARI hybrid maize-15 showed greater aptitude to hold water in flag leaf and better steadiness of flag leaf chlorophyll followed by BARI hybrid maize-7 and BARI hybrid maize-13 under WDS. However, BARI hybrid maize-15 produced the highest grain yield at both well water and WDS condition (11.89 t ha-1 and 10.96 t ha-1 , respectively) with STI value 0.92, on the contrary BARI hybrid maize-9 produced the lowest grain yield (10.32 t ha-1 and 9.12 t ha-1 , respectively) with STI value 0.88. Results indicated that BARI hybrid maize-15 was more tolerant and BARI hybrid maize-9 was more sensitive, whereas BARI hybrid maize-7 and BARI hybrid maize-13 were moderately tolerant to drought.

to evaluate their yield performance in following season. The experiment was conducted following two factor randomized complete block design with three replications. One factor consisted of two sources of seed-i) Seeds obtained from parent plant with normal growing temperature (sowing on November 30) and ii) Seeds obtained from parent plant with high growing temperature (sowing on December 30). Another factor consisted of four wheat genotypes (BARI Gom 27, E 22, BARI Gom 30 and BARI Gom 26). Seed obtained from parent plant with normal growing temperature provided better grain and above ground biological yield (221 and 864 g m-2 , respectively) than seed obtained from parent plant with high growing temperature (191 and 752 g m-2 , correspondingly) in the succeeding season. Relative value based on grain yield indicated that seed of BARI Gom 26 obtained from parent plant with high growing temperature performed better (93%) in next growing season than the seed of BARI Gom 27 (85%), E 22 (81%) and BARI Gom 30 (85%) obtained from parent plant with high growing temperature.

Increasing human population and changing climate, which have given rise to frequent drought spells, pose a serious threat to global food security, while identification of high yielding drought tolerant genotypes remains a proficient approach to cope with these challenges. To offer a methodology for the evaluation of the drought-tolerant wheat genotypes based on the pheno-physiological traits, a field experiment was executed, entailing four wheat genotypes viz. BARI Gom 26, BAW 1158, BAW 1167, and BAW 1169 and two water conditions viz. control treatment (three times irrigation at 20, 50, and 70 DAS, i.e., 100% field capacity) and stressed treatment (no irrigation during the entire growing season). The results revealed that drought stress drastically reduced the days to booting, heading, anthesis and physiological maturity, relative water content (RWC), chlorophyll content, canopy temperature depression (CTD), and photo-assimilates-spike dry matter (SDM), grains spike−1 and grain yiel...

Identification of physiological markers related with salt tolerance during various vegetative and reproductive stages is crucial for evaluating wheat genotypes and improving their salt tolerance. Two salt-tolerant (Shatabdi and BAW 1135) and two salt-sensitive (BARI Gom 26 and BAW 1122) wheat genotypes of Bangladesh were grown in three salinity levels (control, 6 dS m-1 , and 12 dS m-1) to observe the sensitivity of some physiological traits.. Salt-tolerant wheat genotypes maintained lower levels of leaf Na, higher levels of leaf K, and greater K/Na ratios in saline conditions than the sensitive one. Due to salt stress, flag leaf proline content was increased in salt-tolerant wheat genotypes whereas the proline level was decreased in the sensitive one compared to the control. Salt-sensitive genotypes showed a greater increment in SPAD (relative chlorophyll content) value at moderate salt stress but a greater reduction in SPAD values at high salt stress than tolerant ones. Salt-sensitive genotypes were affected more in their straw yield and finally grain yield plants-1 under saline conditions than salt-tolerant genotypes. There was a highly significant negative correlation between grain yield and Na content and also a highly significant negative correlation between grain yield and K : Na content of the wheat genotypes under saline environments. We also observed stress susceptibility index (SSI) based on grain yield plant-1 the order of tolerance was BAW 1135 > Shatabdi > BARI Gom 26 > BAW 1122 at moderate salinity level and BAW 1135 > Shatabdi > BAW 1122 > BARI Gom 26 at high salinity.