The research work was conducted at the experimental plot of Bangladesh Jute Research Institute, Pakhimara, Kolapara, Patuakhali during the kharif season of 2017 to study the growth and yield performance of salt tolerant jute lines. Ten jute lines and one check variety were used for the study viz. (i) C-12221 x D-154, (ii) C-12033 x D-154, (iii) C-2234 x C-3070, (iv) C-2593 x C-2234, (v) C-3473 x C-2234, (vi) C-2593 x C-3070, (vii) C-2593 x D-154, (viii) C-12221 x C-3070, (ix) C-3473 x C-12221, (x) C-2593 x C-12033 and (xi) BJC-2197 (control). Data were recorded on mortality rate, plant height, base diameter, number of nodes/plant, intermodal length, fresh stem weight with leaves, fresh stem weight without leaves, dry stick weight and dry fibre weight. The experimental design was RCBD. Fresh stem weight with leaves and without leaves showed high heritability (94.70% and 81.68%, respectively) accompanied with low genetic advance in percentage of mean and the phenotypic variance (8.34 and 9.58, respectively) was higher than the genotypic variance (8.12 and 8.66, respectively). Among the characters the highest genotypic co-efficient of variation was recorded on mortality rate (20.84) followed by dry fibre weight, dry stick weight. Heritability in broad sense was low to high for all the studied characters, indicated the phenotypic expression. The genetic advance was very low to moderate. The significant positive correlation at the 1% level was observed for dry fibre weight with dry sick weight (0.834 and 0.588) and plant height (0.078 and 0.019) at both genotypic level and phenotypic level. In terms of yield and yield contributing characteristics C-2593 x D-154 can be treated as the best lines under the present study.
Key words: Jute, genotype, growth, yield attributes, salinity.
Soil salinity is a major factor limiting plant productivity, affecting about 95 million hectares world-wide. Salinity imposes serious environmental problems that affect grassland cover and the availability of animal feed in arid and semi-arid region (El-Kharbotly et al., 2003). In Bangladesh, saline soils occur mainly along the coastal areas of the southern part of the country. The total saline area of the country is about 0.88 million hectares of which more than 0.36 million hectares is in Khulna, 0.22 million hectares in Patuakhali and 0.11 million hectares in Chittagong region and 0.17 million hectares in Barisal and Noakhali region. Salinity levels vary in different months of the year. Maximum salinity occurs in the months of March-April, the peak dry season, and minimum in the months of July-August after the onset of monsoon rain (BARI Annual Report, 1991-92). At present, due to population density and increasing land salinization problems, breeding for salinity tolerance in many crops needs to be paid more attention. So, cultivation of jute is regularly being pressed to the marginal lands with higher grades of soil salinity year round. Bangladesh, the second largest producer of jute, produces the best quality jute in the world and leads the export market (Rayhan et al., 2008). In addition, this crop is particularly important in Bangladesh where many small families depend on the income from growing and selling jute (Ghosh et al., 2013). Recently it was reported that the jute can grow readily in saline soils. Considering its tolerance especially to the chlorine salinit