Year 2015
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/2826
2024-03-28T11:24:04ZGENETIC VARIABILITY, CORRELATION AND PATH CO-EFFICIENT ANALYSIS FOR YIELD AND YIELD CONTRIBUTING CHARACTERS OF MAIZE (Zea mays L.)
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/2530
GENETIC VARIABILITY, CORRELATION AND PATH CO-EFFICIENT ANALYSIS FOR YIELD AND YIELD CONTRIBUTING CHARACTERS OF MAIZE (Zea mays L.)
HUDA, MD. NAZMUL
The experiment was conducted in the experimental area of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during March to June, 2014 to study the genetic variability, correlation and path co-efficient analysis for yield and yield contributing characters of maize. In this experiment 25 maize genotypes were used as experimental materials. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Mean performance, variability, correlation matrix and path analysis on different yield contributing characters and yield of maize genotypes were estimated. The highest grain yield/plant (272.21 g) was recorded in the genotype of BARI Hybrid Maize-6, whereas the lowest grain yield/plant (180.40 g) from the genotype of NZ-003. Phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all the yield contributing traits. In correlation study, significant positive association was recorded for grain yield/plant of maize genotypes with plant height (0.235), tassel height (0.359), number of grains/cob (0.854), cob length (0.390), cob diameter (0.313) and weight of 1000-grains (0.689). Path analysis revealed that days to initiation of male flower had positive direct effect (0.132), days to initiation of female flower had negative direct effect (-0.254), days to maturity had positive direct effect (0.178), plant height had positive direct effect (0.314), tassel height had positive direct effect (0.234), ear length had positive direct effect (0.197), number of grains/cob had negative direct effect (-0.095), cob length had positive direct effect (0.167), cob diameter had positive direct effect (0.168) and that weight of 1000-grains had positive direct effect (0.217) on yield/plant. Clustering pattern denoted that, cluster III was the largest cluster comprising of 9 genotypes and cluster I belonged 4 genotypes of maize. Inter cluster distance was maximum (13.034) between clusters I and III, followed by clusters III and IV (10.098).
A Thesis
submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfilment of the requirements
for the degree
of
MASTER OF SCIENCE (MS)
IN
GENETICS AND PLANT BREEDING
SEMESTER: JANUARY-JUNE, 2015
2015-06-01T00:00:00ZCHARACTER ASSOCIATION AND GENETIC DIVERSITY ANALYSIS OF MAIZE (Zea mays L.) VARIETIES IN BANGLADESH
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/2528
CHARACTER ASSOCIATION AND GENETIC DIVERSITY ANALYSIS OF MAIZE (Zea mays L.) VARIETIES IN BANGLADESH
Md. Nazmul, Huda
An experiment was carried out at the experimental field of Sher-e-Bangla Agricultural University, Dhaka-1207, Banladesh during the period of Kharif-1 season in 2014 with 25 maize genotypes to study on character association, genotypic and phenotypic variance, heritability, genetic advance, genotypic and phenotypic co-efficient of variation, correlation co-efficient effect, path co-efficient effect and the genetic divergence considering different important yield and yield contributing characters. Analysis of variance showed the presence of significant variation among the tested genotypes for all the characters studied. Minimum differences of genotypic and phenotypic variances as well as high heritability coupled with high genetic advance in percent of mean were observed for almost all the traits of genotypes indicated additive gene effects of these traits. Correlation studies revealed highly significant positive association of total yield per plant with ear length, ear circumference, number of kernel row per cob, number of kernel per row, number of kernel per cob and 1000 kernel weight. Path analysis showed that day to 50% tasseling, ear length, ear circumference, number of kernel per cob and 1000 kernel weight had positive direct effect on the yield per plant. The genotypes were grouped into five different clusters. Cluster IV consist of highest 10 genotypes and cluster II had only two genotypes. The highest intra- cluster distance was computed for cluster II. The maximum inter cluster divergence was observed between cluster II and III and the lowest was between cluster I and IV. Considering diversity pattern and genetic status Barnali and VB-100 from cluster II; PAC-399 and 4536 from cluster III; BHM-9, Dekalb Super Gold, Dekalb 962 and Dekalb 9120 from cluster IV might be considered better parents for future hybridization programme.
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
SEMESTER: Jan- June, 2015
2015-01-01T00:00:00ZVARIABILITY AND INTERRELATIONSHIP AMONG THE VARIETIES OF Bt AND CORRESPONDING NON-Bt BRINJALS (Solanum melongena L.)
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/2518
VARIABILITY AND INTERRELATIONSHIP AMONG THE VARIETIES OF Bt AND CORRESPONDING NON-Bt BRINJALS (Solanum melongena L.)
AKTHER, MAHFUZA
An experiment was conducted during the period from November 2015 to April 2016 in rabi
season in the experimental area of Sher-e-Bangla Agricultural University, Sher-e-Bangla
Nagar, Dhaka to find out the variability and interrelationship of yield and yield contributing
traits in Bt Brinjal (Solanum melongena L.) along with parents. The result indicated that
different brinjal genotypes differed significantly regarding all the characters studied.
Minimum differences of genotypic and phenotypic variances and coefficient of variation
as well as high heritability coupled with high genetic advanced in percent of mean were
observed for all the traits of different brinjal genotypes indicated additive gene effects of
these traits. Fruit diameter of different brinjal genotypes had a high degree of significant
positive association with yield per plant and high positive direct effect indicated that these
characters had the major contribution towards the yield per plant. Regarding fruit diameter
and yield per plant, the genotype BARI Bt Begun 4 performed best. BARI Bt Begun 3 and
BARI Bt Begun 2 produce higher yield next to the genotype BARI Bt Begun 4. Based on
the comparison of eight brinjal varieties, BARI Bt Begun 4 was found to be the highest
yielder followed by BARI Bt Begun 3 and BARI Bt Begun 2. The other varieties showed
much less yield compared to the formers. As no insecticide was used to study the resistance
capacity of the brinjal genotypes against Lepidopteran insects like fruit and shoot borer, all
Bt Brinjal varieties showed much higher yields compared to their non Bt Brinjal parents.
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 (MS)
IN
GENETICS AND PLANT BREEDING
SEMESTER: JANUARY-JUNE, 2015
2015-06-01T00:00:00ZGENETIC VARIABILITY, CORRELATION AND PATH ANALYSIS IN F4 GENERATION OF Brassica napus L.
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/1104
GENETIC VARIABILITY, CORRELATION AND PATH ANALYSIS IN F4 GENERATION OF Brassica napus L.
SULTANA, SHARMIN
A huge part of Bangladeshi economy is spent on importing edible oil every year to meet
its own requirements. The need is to enhance and improve the production of the local
cultivars and for that purpose the genetic diversity of the local cultivars must be fully
explored. Sixty two F4 genotypes of Brassica napus L. were evaluated based on
randomized complete block design with three replications at the experimental field of
Sher-e-Bangla Agricultural University, Dhaka, to study the variability, correlation, path
analysis and genetic diversity during November 2015 to February 2016 growing seasons.
The genotypes were found significantly variable for most of the characters.
Comparatively phenotypic variances were higher than the genotypic variances for most
of the character studied. The high GCV value was observed for number of secondary
branches per plant (42.31). Number of secondary branches (98.70) exhibited the highest
value of heritability followed by seed yield per plant (98.03) while days to maturity
(88.02) exhibited the lowest value of heritability. The significant positive correlation with
seed yield per plant were found with all most all the characters except days to 50%
flowering (0.033) and days to maturity (-0.096). Path co-efficient analysis revealed that
days to 50% flowering, number of secondary branch, number of siliqua per plant, number
of seed per siliqua, and thousand seed weight had the positive direct effect on yield per
plant whereas days to 80% maturity, plant height, number of primary branch and siliqua
length had the negative direct effect on yield per plant. On the basis of cluster analysis,
all the genotypes were classified in five clusters. The highest inter cluster distance was
observed between cluster I and IV (10.309). The lowest inter-cluster distance (3.513) was
observed between the cluster III and IV. Considering group distance and other agronomic
performance genotypes G3, G4, G24, G35, G51 and G55 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
SEMESTER: July- December, 2015
2015-12-01T00:00:00Z