The study was carried out with an objective to assess the technology of enhancement of fish production by incorporating Minor Carp Sps. in Composite fish culture system. The experiment was conducted for ten months from June, 2018 to March, 2019 in nine earthen ponds of 0.3 ha (3 no. ponds), 0.4 ha (3 no. ponds) & 0.5 ha (3 no. ponds) of three different villages of Angul district. In the first phase Pre-stocking pond preparation methods are followed i.e. removal of predatory and weed fishes by bleaching powder (10 mg/l chlorine) and then basal fertilization (3 tonn cow dung and 30 kg single super phosphate / ha) were carried out before stocking of fingerlings (Jena et al., 2005). Three different species combinations were taken i.e. Control (T1) (Catla : Rohu :Mrigal) at the ratio of 40:30:30 @ 10000 no. /ha and culture for 10 months. In Recommended practice incorporation of Puntius sarana @ 10 % or 1000 no./ha in the Major Carp system i.e. (Catla :Rohu :Mrigal: Puntius) at the ratio of 40:30:30:10 @ 10000 no. / ha and culture for 6 months (T2). Incorporation of Puntius sarana @ 20 % or 2000 no./ha in the Major Carp system i.e. (Catla :Rohu :Mrigal) at the ratio of 40:30:30:20 @ 10000 no. / ha and culture for 6 months (T3). In farmers practice they usually stocked mixed seeds (35-40) mm size of Indian Major Carps and not adopting the scientific Pisciculture practices. In recommended practice the farmers were provided with Complete technical support of raising of the minor Carp Species i.e. Puntius sarana through proper post stocking management measures to utilize the total food space available in the pond environment. Health management aspects were assessed by periodic sampling. Fish yield was recorded after harvesting. About 2.5-3 meter water depth was maintained throughout the study period. Water samples were collected from the ponds at 15-day intervals between 07:00 and 08:00 h and analyzed for important parameters were measured following standard methods (APHA, 2014). Then the data like fish weight (gm), fish yield (Quintal/hectar), Survivability percentage, average net return and B: C was recorded and analysed using statistical tools like Average mean value and percentage. From the results of the analysis it is found out that mean weight gain of Puntius sarana / Olive barb were higher in T3 compared to T1 and T2. Daily weight gain and net fish yield in T2 and T3 were also higher than T1. In the present study stocking of Puntius sarana & IMC fingerlings of recommended size and density along with adopting the post stocking management schedules resulting the increase in Avg. weight of Olive barb upto 315 gm where as the weight of IMC remains 420 gm during harvesting . Net profit of Rs. 1,67,363 was obtained from this technology with benefit: cost (B: C) ratio of 2.75 against Rs. 76,197 and 1.83 respectively from Control (T1) due to more fish growth & production. Similarly 56.55 % increase in fish yield was also observed in this technology (26.3 q/ha) against Control (16.8 q/ha).
The value of combining hybridization and mutagenesis in sesame was examined to determine if treating hybrid sesame plant material with mutagens generated greater genetic variability in four key productivity traits than either the separate hybridization or mutation of plant material. In a randomized block design with three replications, six F2M2 varieties, three F2varieties, and three parental varieties were assessed at Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India. The plant characteristics height, number of seed capsules per plant, and seed yield per plant had greater variability in the F2M2 generation than their respective controls (F2), however, the number of primary branches per plant varied less than in the control population. The chances for trait selection to be operative were high for all the characteristics examined except the number of primary branches per plant, as indicated by heritability estimates. Increases in the mean and variability of the characteristics examined indicted a greater incidence of beneficial mutations and the breakdown of undesirable linkages with increased recombination. At both phenotypic and genotypic levels strong positive correlations between both primary branch number and capsule number with seed yield suggest that these traits are important for indirect improvement in sesame seed yield. As a result of the association analysis, sesame seed yield and its component traits improved significantly, which may be attributed to the independent polygenic mutations and enlarged recombination of the polygenes controlling the examined characteristics. Compared to the corresponding control treatment or to one cycle of mutagenic treatment, two cycles of mutagenic treatment resulted in increased variability, higher transgressive segregates, PTS mean and average transgression for sesame seed yield. These findings highlight the value of implementing two EMS treatment cycles to generate improved sesame lines. Furthermore, the extra variability created through hybridization may have potential in subsequent breeding research and improved seed yield segregants may be further advanced to develop ever-superior sesame varieties.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.