http://localhost:8080/handle/123456789/3572 2026-04-18T21:06:37Z http://localhost:8080/handle/123456789/3649 SCREENING OF YIELD CONTRIBUTING TRAITS OF CHILLI (Capsicum sp.) GENOTYPES AGAINST SALINITY SAMIM, MD. ABU IBNE ANAS Salinity stress is one of the major threat of agricultural production. A pot experiment was conveyed at the experimental net house of the Department of Genetics and Plant Breeding Sher-e Bangla Agricultural University, Dhaka from November to April, 2019 to investigate the effect of Salinity stress on the growth, physiology and yield and the mollification capacity of Salinity in Chilli on different genotypes. The genotypes were DEB 1302 (G 1 ), Bogra Zhal Morich, (G 2 ), Bogra Special Morich (G 3 ), Black Lady (G 4 ), CO 525 G59 SRC04 (G 6 ), SRC07 (G 7 ), SRC03 (G 8 ), SRC06 (G 9 ) and SRC10 (G 10 ) Three salinity treatments viz. T 1 (control), T 2 (4 dS/m, mild salinity), T 3 (8 dS/m, moderate salinity), The genotypes were collected from genetics and plant breeding department and treatments were T 1 (control), T 2 (4 dS/m, T 3 (8dS/m). Completely Randomized Design (CRD) with three replications was followed in both experiments Salinity treatment affected almost all traits of chilli negatively except days to first flowering, first fruit setting, relative water content and chlorophyll content. Early flowering (38.00 DAT) was found in G 9 and early fruit setting (51.55 DAT) was found in G6 at moderate and severe salinity respectively. Phenotypic variance was higher than the genotypic variance for all the characters under all the treatments. Phenotypic coefficient of variation and genotypic co-efficient of variation was high in all the characters except number of branches per plant under T 2 treatment and fruits diameter (mm) under T 2 and T 3 treatments. High heritability coupled with high genetic advance and genetic advance in percentage of mean was found in days to first flowering, days to first fruit setting, root length, number of leaves per plant under all the treatments indicated that this characters are controlled by the additive gene action and direct selection may be effective through this characters. From the research findings of salinity experiment, the following could be recommended G 9 could be suggested for early flowering and fruit setting for mild to moderate saline prone area G 7 could be suggested for maximum leaf area, number of branches per plant, fruit diameter at mild to moderate saline prone area G 6 could be suggested for yield per plant, number of fruit per plant and maximum number of leaves per plant higher for mild to moderate saline prone area. A Thesis submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN GENETICS AND PLANT BREEDING 2020-01-01T00:00:00Z http://localhost:8080/handle/123456789/3648 CHARECTERIZATION AND VARIABILITY ANALYSIS OF SOME ADVANCED LINES OF FINE GRAIN BORO RICE (Oryza sativa L.) SHARMA, BIDYUT PRAVA DEB The experiment was conducted to characterize some advanced lines of fine grain boro rice and to determine the variability among these lines during the period of boro season (2018-2019) at the experimental field of Sher-e-Bangla Agricultural University, Dhaka. These advanced lines of fine grain boro rice were characterized for 15 quantitative and 17 qualitative traits. Variability study was carried out on 15 parameters to select the best lines for further trial. Among the qualitative characteristics, variation was observed in leaf color, leaf sheath: anthocyanin color, flag leaf: attitude of the blade, lemma and palea: anthocyanin color, stem: anthocyanin coloration of internodes, spikelet: color of the tip of lemma, panicle: awns in the spikelet, panicle exertion, grain color and culm habit. Among the quantitative characteristics- time of heading, stem: culm diameter, days to maturity, grain length, decorticated grain length showed difference for all the lines. In case of variability study all the characters showed significant result. Phenotypic variance was higher than the genotypic variance for all the characters indicating environmental effect presence on these characters. High phenotypic and genotypic coefficient of variation was found in unfilled grain/plant and days to 80% maturity. High heritability coupled with high genetic advance and genetic advance in percentage of mean was found in primary branch/panicle, spikelet/panicle, filled grain/plant and unfilled grain/plant which indicated that additive gene expression on this character. Character association analysis indicating that yield/plant had highest significant positive correlation with thousand seed weight (g) in both genotypic and phenotypic level indicating the importance of these trait in selection for increasing yield. Most of the lines showed higher no. of effective tillers, long panicles with higher no. of grains/panicle which would be the agronomic superiority. The average panicle length was 24.83 cm and mean total no. grain was 179.31 per panicle which contributed to an average yield of 36.97 g per plant. Five lines viz. L1, L2, L3, L6 and L7 showed extra-long fine rice grain character. The highest yield was observed in L10 (7.70 t/ha), L8 (7.50 t/ha) and L5 (7.40 t/ha) comparing with the check varieties. So, the best lines viz. L5, L8 and L10 which could be used for further trial in future to follow the release procedure in respect of time and yield. A Thesis submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka-1207, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN GENETICS AND PLANT BREEDING 2020-01-01T00:00:00Z http://localhost:8080/handle/123456789/3647 GENETIC DIVERSITY AND CHARACTER ASSOCIATION IN TOMATO (Solanum lycopersicum L.) GENOTYPES DEVI, EAPSHITA The experiment was conducted using thirty crossing genotypes and six parents in F 2 generation of tomato (Solanum lycopersicum L.) under field condition for identifying their inter genotypic variability, correlation, path co-efficient and genetic diversity by considering their nineteen yield contributing characters at the experimental field of Shere-Bangla Agriculture University, Dhaka, Bangladesh. For all the characters the genotypes significantly different from each other. PCV was always higher than GCV for all the traits. High heritability was observed for the number of flower per cluster (84.93%), number of fruit per cluster (90.30%), number of fruit per plant (99.77%), individual fruit weight (99.61%), fruit length (91.84%), and yield per plant (93.16%). Positive correlation coefficient for both genotypic and phenotypic with yield was found for leaf width, individual fruit weight, fruit length, fruit width, skin diameter and locule number. A positive direct effect on yield per plant for the characters, leaf length, leaf width, number of cluster per plant, number of flower per plant, individual fruit weight, fruit length, fruit width, relative water content and P H was identified through path co-efficient analysis. The highest intercluster distance was observed between II and IV (14.738) and the lowest inter-cluster distance was observed between I and V (3.681). The highest intra-cluster distances were observed in cluster III and the lowest intra-cluster distances were observed in cluster IV. Based on cluster mean and agronomic performance the genotypes G6×G1 showed the minimum days to first flowering and days to 50% flowering from cluster V. G6 showed the maximum number of cluster per plant from cluster II. G7×G1 showed maximum individual fruit weight from cluster IV. G6×G7 showed maximum fruit width and total soluble solids from cluster V and G9×G7 showed maximum yield per plant from cluster IV. Therefore, considering group distance and other agronomic performance these inter genotypic crosses might be suggested for future breeding program. A thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN GENETICS AND PLANT BREEDING 2020-01-01T00:00:00Z http://localhost:8080/handle/123456789/3646 EFFECT OF PHYTOHORMONES IN OVERCOMING THE CROSS INCOMPATIBILITY BARRIER OF Corchorus capsularis AND Corchorus olitorius Hybrids AFZAL, MD. MOSTAFA BIN This research work was carried out for producing inter-species putative hybrids of two cultivated jute species Corchorus capsularis and Corchorus olitorius by applying phytohormones and evaluating hybrid performance. This study was organized and executed in two seasons, first season for producing inter-species putative hybrids through applying phytohormones and the second season the performances the of the putative hybrids were evaluated. Five varieties of C. capsularis and six varieties of C. olitorius were used for interspecies hybridization programme. The eleven parents and their fourteen inter-species putative hybrids were used for estimation of heterosis and character association study. Two hormone treatments, IAA and mixed hormones (GA 3 +NAA+Kinetin) were used to increase better embryo development and seed setting. Results showed that hormone treatments affected in fruit and seed setting. IAA gave better performance in seed setting and mixed hormones gave better performance in fruit setting. In case of the fruit setting, it was 41.21% in IAA and 46.0% in mixed hormones. While in case of seed setting, 13.80% in IAA and 7.33% in mixed hormones. The analysis of variance showed that there were significant variations among the performance of the parents and putative hybrids for the all the traits except base diameter and dry fiber weight. In case of hybrids, the higher heterosis value for plant height, base diameter, petiole length, root length, root weight, fresh weight with leaves, fresh weight without leaves, dry stick weight and dry fiber weight were 65.381% (OM-1 X CC-45), 36.065% (O-9897 X BJRI-2142), 34.444% (O-3820 X CVE-3), 48.995%( JRO-524 XCVL-1), 174.04% (O-9897 X BJRI-2142), 352.380% (O-72 X BJRI-2197), 347.27% (O-72 X BJRI-2197), 275.04%( O9897 X BJRI-2142) and 175.46% (JRO-524 XCVL-1) over better parent values respectively. In the correlation coefficient study, almost same result was observed in parents and interspecies putative hybrids at phenotypic levels. Correlation coefficient of the parents and interspecies hybrids clearly indicated that plant height, base diameter, petiole length, root length, root weight, fresh weight with leaves, fresh weight without leaves, dry stick weight and dry fiber weight, characters have very high degree of positive relationships in all cases. Taking together, IAA hormones had more effect in overcoming the cross incompatibility barrier between two cultivated jute species. Again, considering all characters the highest mean performance and heterosis value was in found in O-72 X BJRI-2197 cross combination indicating this combination would give transgressive segregants in later generations. A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTERS OF SCIENCE IN GENETICS AND PLANT BREEDING 2020-01-01T00:00:00Z