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Maize is one of the most important cereals globally and a promising cereal supplement in Bangladesh. The current study was undertaken to assess genetic diversity among nine maize genotypes. Data were recorded on seven morphological traits viz. plant height (cm), ear height (cm), ear length (cm), ear diameter (cm), number of kernels/ear, 1000-kernel weight (g) and yield/plant (g). Statistical analysis showed significant variation among maize genotypes. Considering plant height, ear length, ear diameter, ear height, number of kernels/ear and yield/plant BHM-7 was observed as the best one. Among all the traits higher phenotypic coefficient of variation and genotypic coefficient of variation were observed for yield/plant. Genetic advance was highest for 1000-kernel weight followed by number of kernels/ear. The correlation study revealed only two positive significant associations: plant height with yield/plant and ear diameter with ear length. Nine genotypes were grouped into three clusters. These all clearly indicated the presence of ample genetic diversity among maize genotypes which can be exploited in future breeding program for better utilization of maize germplasm.Res. Agric., Livest. Fish.2(1): 53-61, April 2015

Background and Aims. Anatomy of twelve tossa jute genotypes were performed for the variability, heritability, and genetic advance based on yield attributing six anatomical traits. Materials and Methods. The experiments were carried out in field and laboratory including 12 tossa jute genotypes followed by RCB design in JAES, Manikganj, and Bangladesh Jute Research Institute, Dhaka, Bangladesh, during 2019-2020. Hypothesis. The tested genotypes were expected to perform better than controls in respect of anatomical characters contributing to fiber yield in tossa jute plants. Results. Five genotypes, i.e., Acc. 1318, Acc. 1306, JRO S1, O-412-9-4, and O-0512-6-2 providing good results for the total fiber bundle area, trapezoid number, bark diameter, area of trapezoid, and bark thickness per transverse section in the anatomy of jute plants depicting the more variability (P>0.01) as well as the possibility of tossa jute varietal development. These morphological and anatomical traits showing highly significant association (∗∗) with one another and coupled with high genetic and phenotypic variance components; high heritability; high and moderate genetic advance and higher divergence in clustering (D2), and PCA would be used as criteria for selection and improvement for fiber yield of tossa jute. Conclusions. The high variation and divergence for anatomical characters may be considered an effective selection method of genotypes for higher fiber yield comparing with controls. The genotypes, i.e., Acc. 1318, Acc. 1306, JRO (segregate), O-412-9-4, and O-0512-6-2 with good anatomical traits related to fiber yield could be used as parents in breeding program as well as direct variety development.

The field experiment was conducted at the farmer’s field of Sutiakhali, a village near the BAU, Mymensingh to investigate effect of integrated nutrient management on yield of cabbage and soil fertility during the period from 5th November 2013 to February2014. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications and five treatments levels viz. T1: Recommended Dose (RD, N150P53K50S30Zn1.5Bo.7Mo0.5) T2: Soil Test Base (STB, N178P65K51S27Zn1.5B0.7Mo0.5) T3: Integrated Plant Nutrition System (IPNS, N158P59K42S24Zn1.5B0.7Mo0.5) + Cow dung (CD) @ 5.0 tha-1, T4: Farmer’s Practice (FP, N65P42K71S6) T5: Control (no fertilizer). The Integrated Plant Nutrition System showed significant positive effect on the yield and yield components of cabbage cv. Atlas-70. The results of the present study showed that cow-dung with inorganic fertilizers have significant variation on all the parameters except number of loose leaves. The highest values for plant height (25.88cm), number of folded leaves per head (42.50), length of the biggest leaf (34.77cm), length of the lateral root (31.92 cm), length of stem (6.83cm) were recorded in T3 treatments, on the other hand the highest values in case of number of loose leaves at the treatment of T5 (control). The yield of cabbage crop has increased significantly with application of inorganic fertilizer in combination of cow dung over the control. The highest values for fresh weight of cabbage was 89.16 t ha-1, dry matter content of head (5.93%), dry matter content of loose leaves (9.72%), were recorded at T3 treatments by the application of inorganic fertilizer (N158P59K42S24Zn1.5B0.7Mo0.5) in combination with cow dung @ 5.0 tha-1. The above results indicated that the integrated nutrient management had a remarkable effect in promoting soil fertility and increasing yield and yield components of cabbage.Asian J. Med. Biol. Res. June 2015, 1(2): 182-186

Background and aim of the study: Tossa jute (Corchorus olitorius) is a natural fibre crop produces good quality fiber having great demand for industrial uses. High yielding tossa jute variety is very important in Bangladesh. Materials and methods: Bangladesh Jute Research Institute (BJRI) has developed a new tossa jute variety (BJRI Tossa Pat 7) through pure line selection (PLS) from another pre-released variety named OM-1 during 2017. The new variety was evaluated for fiber yield and attributing phonological traits through comparing with another prereleased variety named BJRI Tossa Pat 5 (O-795) in RCB design at six locations during 2015-2018. Results: Distinct morphological traits i.e. ovate lanceolate glossy leaves; full green plant were found in MG-1 and stem & stipule red; ovate lanceolate leaves in O-795. MG-1 showed higher fiber yield (3.39-3.40 t ha À1 ) where, O-795 showed 3.10-3.22 t ha À1 as means of their maximum performances for three years at both farmers' plots and research fields. MG-1 gave higher plant height, base diameter, fiber yield than O-795 at both research stations and farmers' fields. Even after sowing at 10-15 March, MG-1 gave late flowering; lower leaf size, leaf angle, green leaf biomass and node number; maximum inter-nodal length, bark diameter, bark thickness and fiber bundle cells; and finally golden bright quality fiber than O-795. If both varieties were sown at 2 nd to 3 rd week of March, and harvested at 110 days old, MG-1 gave 5-7% higher fiber yield than O-795. Conclusion: Undoubtedly, MG-1 is a good tossa jute variety for its fiber yield and quality than pre-released varieties. Recommendation: MG-1 having good fiber yield would be used for commercial cultivation by the farmers to contribute to the national economy.

Background and aims: Investigation was carried out to estimate the variability, heritability, genetic advance for fiber yield based on yield attributing morpho-anatomical traits of tossa jute in field and laboratory. Materials & Methods:The experiments were carried out using 12 tossa jute genotypes followed by randomized complete block design in five jute research regions (Rangpur, Faridpur, Jessore, Manikganj districts and Bangladesh Jute Research Institute head office, Dhaka) of Bangladesh during 2019-20. Hypothesis: The tested genotypes were expected to perform better for fiber yield than control varieties. Results: The jute genotypes i.e. Acc. 1318, Acc. 1306, (JRO S 1 ), O-412-9-4, O-0512-6-2 providing good results for plant height, base diameter, green weight and dry fiber yield in morphological study; and total trapezoidal area per transverse section, number of trapezoid per T. section, bark diameter, bark thickness in anatomical study depicting the more variability as well as possibility of tossa jute development. These morphological and anatomical traits showing significant association with one another, and coupled with high genetic and phenotypic variance-covariance components; high heritability; high & moderate genetic advance and genetic advance in percent of mean would be used for selection of jute genotypes regarding the jute crop improvement for fiber yield. Conclusions: The high variation for morphological and anatomical characters may be considered as effective method for screening of jute genotypes for higher fiber yield comparing with control varieties. The genotypes i.e. Acc. 1318, Acc. 1306, (JRO S 1 ), O-412-9-4, O-0512-6-2 with good morphological and anatomical traits related to yield could be used as parents in breeding program as well as jute variety development.

An investigation was done to assess the genetic variability, character associations, and genetic diversity of eight jute genotypes for seven morphological traits in a randomised complete block design at Bangladesh Jute Research Institute during 15 March, 2018 to 31 December, 2019. Analyses results revealed significant differences (P<0.01) among all genotypes for studied traits indicating the presence of variability. All the lines performed better than one control (JRO-524), and the line (O-0412-9-4) provided good results for desired traits than all controls. Jute fibre yield showed the highest broad sense heritability (98.54%). The studied jute morphological traits i.e. Plant population, the plant height, green weight, dry fibre yield and dry stick yield gave high heritability along with high genotypic and phenotypic variances, genetic advances in percent of the mean, highly significant and positive correlations. It indicates the possibility of crop improvement through phenotypic selection and maximum genetic gain, simultaneously at the genotypic-phenotypic level. Clustering analysis grouped all genotypes into three distinct clusters. The cluster II showed the highest mean values for all traits followed by cluster I and III. The first two principal components with higher Eigen values (>1.0) accounted for 90.88% of the total variation in the principal component analysis. PCA and cluster analyses indicated that the advanced breeding line O-0412-9-4 made its individual cluster II with higher inter-cluster distance and higher fibre yield (3.12 t ha-1). The investigation was done to select the genotype(s) with good fibre yield and distinct features in respect of developing high yielding Tossa jute variety for cultivation in the farmers’ field. This genotype O-0412-9-4 was selected based on higher plant height, base diameter, fibre yield content. It will be developed as a high yielding variety considering its’ higher genetic variability, heritability, genetic advance, significant associations for desirable characters.

Salinity is a serious abiotic stress to Jute and other crop cultivation at saline regions in the world. No salt tolerant Tossa Jute (Corchorus olitorius L.) variety was developed in Bangladesh. Hence, six Tossa Jute accessions were investigated at germination stage against six concentration levels (0.00 or d.H2O, 8.0, 10.0, 12.0, 14.0 and 16.0 dS m-1) of salt (NaCl) using RCB design at Bangladesh Jute Research Institute (BJRI) during March-July, 2020. Jute seeds collected from Gene Bank of BJRI were allowed to germinate under laboratory condition. Seed germination rate was adversely affected as well as delay in germination was prolonged with increasing the salt concentration. In control, seeds were germinated up to 14.0 dS m-1 salt solution. Among six genotypes, Acc. 1141 and Acc. 3801 showed the highest germination rate (86.67 %); Acc. 3801 gave maximum root length (17.0 mm), dry biomass (6.37 mg); and Acc. 1089 showed higher shoot length (10.0 mm), fresh weight (43.93 mg) and salt tolerance index (60.69 %) under 14.0 dS m-1 level. Higher relative salt harm rate (7.14 %) was observed in both Acc. 1141 and Acc. 3801 under 14.0 dS m-1 salinity indicating highly tolerance to salinity. Acc. 3801 and Acc. 1141 were found good for germination under salt stresses; Acc. 3801, Acc. 1089 for fiber yield and salt tolerance; Acc. 3801 and Acc. 1407 for higher fiber yield. Acc. 3801 was found good for salt tolerance and fiber yield content. The genotypes with good desirable characters would be used as breeding materials to develop high yielding salt tolerant Tossa Jute variety.