No abstract

Genetic diversity is the base for survival of plants in nature and for crop improvement. Diversity in plant genetic resources provides opportunity for plant breeders to develop new and improved cultivars with desirable characteristics. Therefore, an experiment was employed to determine the genetic variability and evaluate the growth performing parameters of different Chaba germplasm at the research field of Regional Spices Research Centre, Bangladesh Agricultural Research Institute, Magura during kharif 1 season in 2018-19 following completely randomized design with three replications.  Six germplasm namely PCmag-001, PCmag-002, PCmag-003, PCmag-004, PCmag-005 and PCmag-006 were collected from khulna region of Bangladesh and transplanted adjunct to different tree species mainly mango. Among the six germplasm heighest plant height (450 cm), number of branch (35), number of leaves (350), internodes length (16 cm) and vine diameter (2.5 cm) after one year of planting was recorded from PCmag-001 germplasm followed by PCmag-002 while the lowest plant height (450 cm), number of branch (35), number of leaves (350), internodes length (16 cm) and vine diameter (2.5 cm) were found from the germplasm PCmag-005. Through the observation of one year field trail in terms of growing characteristics the germplasm PCmag-001 and PCmag-002 can be chosen for future breeding material to release a commercial variety in southern part of Bangladesh.

The extent of genetic diversity in the crop plants is of prime concern to plant breeders and germplasm curators. Therefore, a study was employed to determine the genetic diversity and to evaluate the performance of eight genotypes of isabgol (Plantago ovata Forsk.) through analysis of morpho-physiological and yield attributing characteristics. All the germplasm was collected from different areas of Bangladesh. The experiments were conducted at the research field of Regional Spices Research Centre, Magura during the rabi season, 2019-20 to characterize phenotypically and to evaluate the performance of different isabgol germplasm. The experiments were laid out in randomized complete block design with three replications. The highest plant height (42.33 cm), number of tillers per plant (7.33), number of leaves per plant (74), length of leaf (30.00 cm), number of spikes per plant (29.0), length of spike (4.03 cm), 1000 seeds weight (2.0 g)  and seed yield (823 kg ha-1) of isabgol was found from the germplasm PO-001 and the lowest  plant height (39.67 cm), number of tillers per plant (6.33), number of leaves per plant (69.33), length of leaf (26.33 cm), number of spikes per plant (23.0), length of spike (3.67 cm), 1000 seeds weight (1.87 g) and seed yield (705 kg ha-1) of isabgol was found from the germplasm PO-007. On the basis of this field trail in terms of seed yield and other important agronomic characteristics the genotypes PO-001 can be chosen for future breeding material to release a commercial variety in Bangladesh climatic conditions.

Soil salinity has long been regarded as one of the most serious environmental constraints limiting agricultural crop growth and productivity. The goal of this study was to analyze the morpho-physiological and biochemical alterations of basak plants at varying salinity levels by a pot experiment. The experiment was set up in a Randomized Complete Block Design (RCBD) with five replications. The three different salinity levels (4 dS/m, 8 dS/m and 12 dS/m) and control (tap water) comprised the four different treatments in this investigation. The study showed that all parameters viz growth, physiological and biochemical were influenced significantly by different seawater induced saline treatments over time. Different morpho-physiological features, such as plant height, number of leaves, number of branches, and total dry matter (TDM) were shown to be decreased with increasing salinity as compared to control. However, chlorophyll (Chl) a, Chl-b, total Chl and carbohydrate content of basak plants were also negatively associated with increasing different seawater induced salinity levels. In response to seawater stress plants accumulate several biochemical compounds. In that case, the accumulation of proline (Pro), total phenol, MDA content and total antioxidant activities were found to be highest when plants were exposed to the uppermost salinity level i.e. 12 dS/m. Collectively, the findings reveal that, while seawater-induced salinity had a substantial impact on basak growth and biochemical parameters, all plants were able to endure a wide range of salinity levels, demonstrating the basak plant's ability to cope with salt-induced membrane damage.