Dept. of Genetics & Plant Breeding

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

Sat, 01 Feb 2014 00:00:00 GMT

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.

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

Wed, 01 Apr 2015 00:00:00 GMT

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

Wed, 01 Jul 2020 00:00:00 GMT

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.

SELECTION OF EARLY GENOTYPES BY BIOMETRICAL AND MOLECULAR TOOLS TO IMPROVE FIBER YIELD IN UPLAND COTTON (Gossypium hirsutum L.)

Mon, 01 Dec 2025 00:00:00 GMT

SELECTION OF EARLY GENOTYPES BY BIOMETRICAL AND MOLECULAR TOOLS TO IMPROVE FIBER YIELD IN UPLAND COTTON (Gossypium hirsutum L.) JUI, SOHANA Cotton (Gossypium hirsutum L.) is a major fiber crop but contributing minimum to our GDP. However, productivity remains limited due to long crop duration (6-7 months) and low yield of cultivated varieties. Therefore, this study aimed to identify early-boll picking with high quality fiber yield potential genotypes through integrated biometrical and molecular approaches. Three experiments were conducted from July 2021 to December 2023 at Cotton Research, Training and Seed Multiplication Farm, Sadarpur, Dinajpur started with 100 and ended to 12 upland cotton genotypes comprising released varieties, elite breeding lines, local cultivars, a mutant variety, and advanced lines. In the first experiment, genotypes JA-11/L, BC-0025, BC-0033, BC-0027, RA-2, and BC-0024 showed superior yield and early performance. High heritability coupled with high genetic advance was shown by boll number, boll weight, and seed cotton yield. Correlation and path analyses identified sympodial branches, bolls per plant, and single boll weight as key yield determinants. Cluster and principal component analyses grouped the genotypes into eight distinct clusters, with the first five principal components explaining 73.09% of total variation. The second experiment evaluated 45 selected genotypes for earliness and productivity. Genotypes RA-2, BC-0027, BC-0491, BC 0510, and BC-0512 combined early maturity with high yield and outperformed standard checks. The third experiment assessed 12 promising genotypes for morphological, fiber quality traits and molecular profiling. Significant variation was detected in plant height, flowering time, bolls per plant, fiber yield, and earliness index. Fiber quality parameters like upper half mean length, strength, micronaire, and reflectance varied significantly. The genotype BC-0491 and BC-0510 exhibited superior fiber attributes. Molecular characterization using 20 SSR markers identified nine polymorphic markers generating 26 alleles. Markers MGHES16 and NAU3736 showed high polymorphic information content. STRUCTURE and UPGMA analyses revealed two major genetic clusters, confirming genetic distinctness among the selected genotypes. Overall, integration of morphological, fiber, and molecular analyses identified the genotypes RA-2, BC-0027, BC-0491, BC-0510, and BC-0512 as promising parental lines for developing early maturing, high-yielding cotton varieties with improved fiber quality suitable for Bangladesh. SELECTION OF EARLY GENOTYPES BY BIOMETRICAL AND MOLECULAR TOOLS TO IMPROVE FIBER YIELD IN UPLAND COTTON (Gossypium hirsutum L.); A PhD DISSERTATION BY SOHANA JUI, Registration No: 1505198; DOCTOR OF PHILOSOPHY IN GENETICS AND PLANT BREEDING , DEPARTMENT OF GENETICS AND PLANT BREEDING, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR-5200, BANGLADESH; DECEMBER 2025.