Faculty of Agriculture

MULTIVARIATE ANALYSIS AND EVALUATION OF HYBRIDS WITH THEIR PARENTS IN FINE RICE

2026-06-09T09:07:05Z

MULTIVARIATE ANALYSIS AND EVALUATION OF HYBRIDS WITH THEIR PARENTS IN FINE RICE Haque, Md. Monzurul Twenty five fine rice genotypes including thirteen non-aromatic and twelve aromatic cultivars were evaluated for fifteen quantitative characters to select the most yield enhancing characters as well as the diverged cultivars for hybridization. The mean performances and genetic parameters of the characters were separated through univariate analysis; the most yield promoting characters were selected by bivariate and multivariate analyses and desirable parents were selected by univariate and multivariate analyses. Though high heritability was estimated for most the characters but the highest genetic advance was estimated against spikelets/panicle (125.74). Effective tillers/hill, spikelets/panicle showed positive and significant, and plant height, days to 50% flowering and days to maturity showed negative and significant correlation coefficients with yield. Upon partitioning the total phenotypic correlation coefficients with yield, 1000-grain weight exerted the highest direct effect (0.84), followed by spikelets/panicle (0.67) and effective tillers/hill (0.61), therefore, these three characters appeared as the predominant yield accelerating characters in fine rice. A total of thirty selection indices were constructed based on five characters including yield and the highest relative efficiency of simultaneous selection was gained from I12345 (223.31%). Twenty five cultivars were grouped into six clusters by D2 statistics and six cultivars such as Kataribhog, Salna, Ranjit, Begunbichi, Chinigura and Kalozira were selected based on clustering as well as rank distribution of the cultivars. The selected parental lines were evaluated both in research and farmer’s fields to assess their tangible performance for the selected characters. The estimated yield gap between the research and the farmer’s fields was 0.86 t/ha. The selected cultivars produced significantly higher effective tillers/hill, spikelets/panicle and yield in the research field than that of farmer’s field. However, the potentiality of the segregants was predicted in the course of such comparison. It was initially aimed to develop fifteen experimental hybrids through a diallel model, but eight hybrids were finally produced from these six parental lines. The cytogenetical barrier against the failure of seven hybrids was investigated. The non remarkable karyotypic disharmony in the parents may not be the principal cause behind the failure of seven hybrids; other reasons like genetical, physiological and environmental factors may be responsible to create such partial hybridization failure that need to be further investigation. The eight hybrids were evaluated and their competence was measured by three criteria of heterosis. The aroma contents in the hybrids and their parents were compared. Out of eight hybrids, three were non-aromatic and five were aromatic, in which the highest aroma was assessed in the F1 of Kataribhog × Salna and F1 of Kataribhog × Chinigura, hence consideration of yield and aroma content these two hybrids may bring to obtain desirable segregants. MULTIVARIATE ANALYSIS AND EVALUATION OF HYBRIDS WITH THEIR PARENTS IN FINE RICE; A PhD DISSERTATION by Md. Monzurul Haque, Registration no. : 1005053; DEPARTMENT OF GENETICS AND PLANT BREEDING, FACULTY OF AGRICULTURE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200; FEBRUARY, 2014.

SCREENING OF AROMATIC RICE CULTIVARS BASED ON PHYSIO-CHEMICAL PROPERTIES IN RELATION TO DROUGHT STRESS

2026-06-09T08:23:44Z

SCREENING OF AROMATIC RICE CULTIVARS BASED ON PHYSIO-CHEMICAL PROPERTIES IN RELATION TO DROUGHT STRESS SARKAR, MD. NUR-A-ALAM The investigations comprised four experiments which were carried out during 2017 to 2020 to screen the morpho-physiological behavior and assessment of drought tolerance in Bangladeshi local aromatic rice cultivars at Agronomy Research Field-1, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh. There were 65 local aromatic rice cultivars were tested in the 1st experiment for screening out the best performance on the basis of yield performance. Among them 11 aromatic rice cultivars were selected for experiment number 2. The 2nd experiment comprised of two factors Factor A: 11 rice cultivars and Factor B: 2 drought stress level viz., T0= no drought stress (Control) and T1= 40-45% field capacity. Drought stress significantly reduced the growth yield and yield contributing features of tested aromatic cultivars. But the extent of reduction is varied with genotypic difference. The results depicted that, at 40-45% field capacity Chinigura (Red) produced maximum grain yield (56.47 g hill-1) followed by Kalijira (54.63 g hill-1) and Kataribhog (53.89 g hill-1). Kataribhog philipine attained maximum relative water content but Chinigura (Red), Kataribhog and Kalijira also significantly performed better. Kalijira represent the most aroma content (8.56). The single factor 3rd experiment consisted with seven aromatic rice cultivars viz., V1= Chinigura (Red), V2= Kataribhog, V3= Kalijira, V4= Kataribhog (Jata), V5= Radhunipagal, V6= Bolder and V7= Kataribhog philipine. The findings revealed that Chinigura (Red), Kataribhog and Kalijira performed better where Radhunipagal and Kataribhog (Jata) showed the intermediate results and finally Kataribhog philipine and Bolder performed poor in the context of phenological and yield traits analysis with some exceptions. Chinigura (Red) produced the more grain hill-1 (65.66 g) and Kataribhog philipine produced the less (39.55 g). The 4th experiment comprised of two factors; Factor A: 7 rice cultivars viz., V1= Chinigura (Red), V2= Kataribhog, V3= Kalijira, V4= Kataribhog (Jata), V5= Radhunipagal, V6= Bolder and V7= Kataribhog philipine and Factor B: 2 irrigation interval viz., T0= Continuous flooding (Control) and T1= irrigation at 5 days interval, T2= irrigation at 10 days interval, T3= irrigation at 15 days interval, T4= irrigation at 20 days interval and T5= irrigation at 25 days interval. Irrigation interval had significant effect on the plant characteristics of aromatic rice. Continuous flooding and irrigation at 5 days interval performed best for most of the observed characters and irrigation at 25 days interval plant did not survive of all tested cultivars. Interaction of Chinigura (Red) and irrigation at 5 days interval produced the maximum grain yield hill-1 (65.15 g) followed by interaction of Chinigura (Red) and continuous flooding (64.53 g). The interactions of Kataribhog and Kalijira with irrigation at 5 days interval, respectively also statistically significant for grain yield. Considering the abiotic stress (especially drought) condition and limited resources of irrigation water, Chinigura (Red) along with 5 days intermittent irrigation could be best water saving production package under moisture stress prone area of Bangladesh. SCREENING OF AROMATIC RICE CULTIVARS BASED ON PHYSIO-CHEMICAL PROPERTIES IN RELATION TO DROUGHT STRESS; A Dissertation DOCTOR OF PHILOSOPHY By MD. NUR-A-ALAM SARKAR, Reg. No. 1705198, DEPARTMENT OF AGRONOMY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR-5200; JUNE 2022.

GENETIC ANALYSIS OF YIELD AND YIELD CONTRIBUTING TRAITS IN PUMPKIN (Cucurbita moschata Duch. Ex. Poir)

2026-06-08T07:48:52Z

GENETIC ANALYSIS OF YIELD AND YIELD CONTRIBUTING TRAITS IN PUMPKIN (Cucurbita moschata Duch. Ex. Poir) GAZI, MD. MOHSIN The present research program was undertaken to study the genetic analysis of yield and yield contributing traits of pumpkin (Cucurbita moschata Duch. ex Poir.). All experiments were conducted at R & D Farm, Lal Teer Seed Limited, Gazipur, Bangladesh. The present study includes genetic diversity study, interrelationships among yield components, combining ability, heterosis, and heritability of yield and yield related traits. Direct and indirect effects of the traits to yield were also analyzed. Detailed gene actions were studied in selected four crosses for yield and yield contributing characters. The tested genotypes exhibited wide range of variation on different yield and yield components. Among twenty one genotypes of pumpkin, six performed better in respect of different yield components and quality characters. For all traits, genotypic coefficient of variation (GCV) was always smaller than phenotypic coefficient of variation (PCV). Narrow differences between GCV and PCV and high heritability coupled with high genetic advance (GA) confirmed least environmental effects on fruit length, single fruit weight, brix content and yield per plant which offered better scope of selection for variety improvement program of pumpkin. Based on the degree of divergence among genotypes, the twenty one genotypes were grouped into six clusters. Out of these, six different divergent inbred parents (CM-20, CM-1, CM-5, BARI Mistikumra-1, CM-8 and CM-14) were selected using ranking on variance among genotypes within cluster for 6X6 diallel cross including reciprocals. Yield per plant, at phenotypic and genotypic level, was significantly and positively correlated with fruit length, fruit diameter, single fruit weight, flesh thickness, number of fruits per plant and 100-seed weight. These components had the maximum contribution towards total divergence. The direct effect of single fruit weight was very close to correlation value at phenotypic and genotypic level. Thus selection was done through single fruit weight and number of fruits per plant. Studies on interrelationships among yield and yield components revealed that genetic correlation coefficient was higher than corresponding phenotypic ones for all the characters studied, thereby establishing strong inherent relationships among them. Path coefficient analysis showed that single fruit weight had maximum direct effect on yield per plant followed by number of fruits per plant, days to female flower per plant, fruit diameter, number of seeds per fruit and number of female flowers per plant both at genotypic and phenotypic levels. Significant GCA variance was recorded for days to male and female flower opening, fruit length and diameter, single fruit weight, number of fruits per plant, number of seeds per fruit, 100 seed weight, brix content and yield. Both additive and non-additive effects influenced the performance of the hybrid for all traits. Four parents (CM-1, BARI Mistikumra-1, CM-20 and CM-8) were found as good general combiners. Obtaining significantly higher and positive heterosis and expected negative effects for different important characters of pumpkin, two cross combinations namely, CM-1 X BARI Mistikumra-1 and CM-8 X CM-1 were identified as the promising hybrids commercial utilization. Thus, these two hybrids were approved and registered as Hajee F1 and Danesh F1 respectively by NSB, MOA of Bangladesh. Indigenous X Exotic crosses showed significant greater heterosis for yield and its components. Broad sense heritability of all the 13 characters was above 90% indicating high heritability since the expression of yield and its components were controlled by additive, dominance and different epistatic gene interactions which can be used in desirable direction for varietal improvement program of pumpkin. GENETIC ANALYSIS OF YIELD AND YIELD CONTRIBUTING TRAITS IN PUMPKIN (Cucurbita moschata Duch. Ex. Poir); A DISSERTATION BY GAZI MD. MOHSIN, REGISTRATION NO. 1105044; DOCTOR OF PHILOSOPHY IN GENETICS AND PLANT BREEDING, DEPARTMENT OF GENETICS AND PLANT BREEDING, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR, BANGLADESH; APRIL, 2015 .

EFFECT OF IMPROVED FEEDING AND ARTIFICIAL BREEDING ON TURKEY (Meleagris gallopavo) PRODUCTION IN BANGLADESH

2026-06-08T07:35:36Z

EFFECT OF IMPROVED FEEDING AND ARTIFICIAL BREEDING ON TURKEY (Meleagris gallopavo) PRODUCTION IN BANGLADESH A baseline study investigated the major challenges faced by the farmers of Bangladesh were inadequate knowledge and skill on improved feeding and breeding in turkey (Meleagris gallopavo) production. As a result, farmers got low fertility (≤50%), hatchability (≤32%) growth performance and feed efficiency. On the basis of the baseline study, total four experiments were conducted to develop an innovative and cost effective technological package with improved feeding and artificial breeding for turkey farmers. All of the experiments were conducted at the Advanced Avian Research Farm of the Faculty of Veterinary and Animal Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh. Experimental birds were maintained under intensive system with similar management. The experiments were conducted under completely randomized design (CRD), and data were analyzed by one way ANOVA. The 1st experiment was carried out to test the hypothesis that a certain percent of Napier grass (Pennisetum purpureum) could be used to replace expensive concentrate feed for economic turkey production. Live weight gain (22 g/d), feed efficiency (3.18) and profitability (76.80%) was resulted significantly (P<0.01) better in the group of turkey where 25% concentrate feed was replaced by Napier grass. The 2nd experiment investigated the utilization of maize and sesbania sprouted hydroponic fodder for economic turkey production. Higher live weight gain (21 g/d), the best feed efficiency (4.03) and profitability (55.31%) were observed in the group of turkeys fed hydroponic fodder in combination with maize (80%) and sesbania (20%) by replacing 10% concentrate feed. The 3rd experiment was conducted to evaluate the effects of different levels of yeast (Saccharomyces cerevisiae) on growth performance and carcass characteristics of turkeys. The results revealed that 1–2% dietary yeast would be used as a natural growth promoter for turkey production. The 4th experiment was conducted to compare the efficiency of reproductive performance of turkey hen bred by natural mating and artificial insemination using fresh as well as chilled semen. Natural mating was performed by maintaining male-female ratio as ♂:♀=1:4, where artificial insemination was applied using fresh semen (0.02 ml/hen) and chilled semen (0.20 ml/hen). Significantly (P<0.01) highest fertility (89.71%) was obtained when the turkey hens were inseminated with fresh semen compared to chilled semen (60.77%) and even though natural mating (59.21%). Profitability (111.81%) was also highest (P<0.05) in the turkey hens inseminated by fresh semen. Finally, the study concluded that turkey production was at infantile stage, which needed more support. Napier grass, hydroponic fodder in combination with maize and sesbania, and yeast would be used for better growth performance. Artificial insemination with fresh semen could be promoted for better fertility to develop a profitable and sustainable turkey farming in Bangladesh. EFFECT OF IMPROVED FEEDING AND ARTIFICIAL BREEDING ON TURKEY (Meleagris gallopavo) PRODUCTION IN BANGLADESH; A Dissertation Submitted By Mohammad Asaduzzaman, Registration No.: 1605317; In partial fulfillment of the requirements for the degree of Doctor of Philosophy In Genetics and Animal Breeding, Department of Genetics and Animal Breeding, Hajee Mohammad Danesh Science and Technology University Dinajpur-5200, Bangladesh; July 2020.