Year 2010
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/2773
2024-03-28T18:37:53ZVARIABILITY CORRELATION AND PATH ANALYSIS IN SEGREGATING POPULATION OF Brassica rapa OBTAINED THROUGH INTERVARITAL CROSSES
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/817
VARIABILITY CORRELATION AND PATH ANALYSIS IN SEGREGATING POPULATION OF Brassica rapa OBTAINED THROUGH INTERVARITAL CROSSES
ARA, SHIFAT
A research was conducted by using eight F2& eight F4 populations generated
through inter-varietal crosses, along with three check varity of Brassica rapa and
grown in the experimental farm of Sher-c-Bangla Agricultural Unriversity. Dhaka,
during November 2009-March 20010 to study the variation in different characters,
correlation between pairs of different characters and the direct and indirect effect
of different characters on seed yield per plant of the F2 & F4 materials to select the
plants with higher potential. From the values of mean, range and CV (%) of seed
yield and yield contributing characters it was confirmed that there were
considerable variation present among all the genotypes used in the experiment. It
was shown that more seggregation present in P2 material than F4 material. The
values of phenotypic variances were higher than the corresponding genotypic
variances. I)ays to 50% flowering, days to maturity, number of primary branches
per plant, number of secondary branches per plant, length of siliqua, number of
seeds per siliqua. thousand seed weight and yield per plant showed least difference
between phenotypic and genotypic variances. The values of GCV and PCV
indicated that there was least variation present among most of the characters. The
days to maturity, length of siliqua, seeds per siliqua, thousand seed weight showed
high heritability with low genetic advance and genetic advance in percentage of
mean. Yield per plant had significant and highest positive correlation with length
of siliqua, seeds per siliqua and thousand seed weight. The path co-efficient
analysis revealed that siliquae per plant had the highest positive direct eRect
followed by number of secondary branches per plant, days to 50% flowering,
length of siliqua, and plant height. Sixteen most promising plants with short
duration and higher yield were selected from eight crosses of the F2 populations of
Brassica rapa & forteen most promising plants with short duration and higher
yield were selected from eight crosses of the F4 populations
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka- 1207
In partial flulfiliment of the requirements
for the degree of
MASTER OF SCIENCE r IN
GENETICS AND PLANT BREEDING
SEMESTER: JANUARY - JUNE, 2010
2010-06-01T00:00:00ZVARIABILITY, CORRELATION AND PATH CO-EFFICIENT ANALYSIS OF BITTER GOURD (Momordica charantia L.)
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/816
VARIABILITY, CORRELATION AND PATH CO-EFFICIENT ANALYSIS OF BITTER GOURD (Momordica charantia L.)
TALUKDER, SHAHNEWAZ ALAM
Seventeen genotypes of bluer gourd (Momordica charantia L.) were studied in a field experiment conducted
at the experimental field of Sher-e-Bangla Agricultural University. Dhaka. during April 2009 to September
2010. The objectives of the study were to measure the variability among the genotypes for yield and yield
contributing characters, estimate genetic parameters, association among the characters and their contribution
to yield. There was a great deal of significant variation for all the characters among the genotypes.
Considering genetic parameters high genotypic co-efficient of variation (GCV) was observed for branches
per vine, yield per plant and number of fruit per plant whereas low genotypic co-efficient of variation (GCV)
was observed for days to first male and female flowering. In all the cases, it was found that phenotypic coefficient
of variation was greater than genotypic co-efficient of variation. }lighest genotypic and phenotypic
co-efficient of variation was observed in branch per vine, fruit length, fruit weight and number of fruit plant
which indicated a wide variability among the genotypes and offered better scope of selection. The results
obtained showed that fruit length showed low direct and positive effect on yield per plant and indirect
positive effect on yield per plant via fruit diameter and average fruit weight. Similar result was found for
fruit diameter. Average fruit weight and number of fruits per plant showed high direct and positive effect on
yield per plant. Path analysis revealed that average fruit weight, number of fruits per plant, days to male
flowering and fruit length had positive direct effect on fruit yield. Hybridization between the genotypes of
cluster II and cluster VI will manifest maximum heterosis and create wide genetic variability. The highest
heterosis would be manifest in cross combination involving the genotypes belonging to divergent clusters.
Considering group distance and the agronomie performance, the inter genotypic crosses between G2& 65;
G2&G14;O I 4&G I 5:G2&G I 5;G I 0&G II ;G I 0&Gl 3:611 &Gl 3;G5&G I 5;G5&G I 4;might be suitable choice
for future hybridization programme.
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial flultiliment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
GENETICS AND PLANT BREEDING
SEMESTER: January-June, 2010
2010-06-01T00:00:00ZCOMBINING ABILTY AND HETEROSIS THROUGH LINE X TESTER ANALYSIS IN Brassica napus L.
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/815
COMBINING ABILTY AND HETEROSIS THROUGH LINE X TESTER ANALYSIS IN Brassica napus L.
HASSAN, OLIUL
The study was conducted to evaluate six female parents (CMS lines) and 3 male parents
(testers) in a line x tester mating design at the research field of Sher-e-Bangla Agricultural
University, Dhaka, during November 2009 to March 2010 to estimate their combining and
heterosis. The data recorded on 18 F1 s and their parents for their combining ability indicated
that (ICA effect was significant for days to fifty percent flowering, plant height, No. of
siliqua per plant, seed per siliqua, primary branch & secondary branch per plant and seed
yield per plant . The specific combining ability (SCA) effect was significant for all the
characters. High ratio of SCA and GCA variance was observed, indicating preponderance of
non additive gene effects in the inheritance of the yield and yield relating characters under
study. Among the lines, CMS2, CMS3 and CMS5 were found as good general combiners.
But seven hybrids exhibited good specific combiner among eighteen hybrids. Different types
heterosis i.e. heterosis over mid parent (Hm), heterosis over better parent (Rb) and heterosis
over standard check (HC) were estimated to evaluate eighteen hybrids for seed yield and
yield related characters, where BARI Sharisha-7 was taken as check. The average heterosis
for seed yield of eighteen hybrids over mid parent was 19.26% and that of better parent and
standard check was 7.96% and 73.90%, respectively. Sixteen hybrids out of eighteen showed
higher plant height than the standard check variety.
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
IN
GENETICS AND PLANT BREEDING
SEMESTER: Jan-Jun, 2010
2010-06-01T00:00:00ZGENETIC DIVERSITY, CORRELATION AND PATH CO-EFFICIENT ANALYSIS IN COUNTRY BEAN (Dolichos lablab L.)
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/808
GENETIC DIVERSITY, CORRELATION AND PATH CO-EFFICIENT ANALYSIS IN COUNTRY BEAN (Dolichos lablab L.)
BEGUM, FATEMA
fwenty six genotypes of Country bean (Do/ichos labia/i L.) were studied at the
experimental farm of Sher-e-Bangla Agricultural University. Dhaka, during October
2009 to March 2009. The objectives of the study were to measure the variability
among the genotypes for yield and yield contributing characters, estimate genetic
parameters, association among the characters and their contribution to yield. There
was a great deal of significant variation for all the characters among the genotypes.
High genotypic co-efficient of variation (CCV) was observed for pod width,
inflorescence length, pod per inflorescence whereas low genotypic co-efficient of
variation (('CV) was observed for seed Nvidth, seed length, days to first flowering. In
all cases, phenotypic variances were higher than the genotypic variance. Heritability
with low genetic advance in percent of mean was observed in seed width which
indicated that non-additive gene effects were involved for the expression of this
character and selection for such trait might not be rewarding. High heritability with
high genetic advance in percent of mean was observed for pod width, inflorescence
length indicated that this trait was under additive gene control and selection for
genetic improvement for this trait would be effective. Correlation studies revealed that
the highest significant association of yield per plant was observed with pod length,
pod weight, pods per plant, inflorescence per plant. Path co-efficient analysis revealed
the maximum direct contribution towards yield per plant was with pod weight
followed by pods per plant, pod width and number of flower per inflorescence. The
highest intra-cluster distance was found in cluster IV and lowest in cluster 1. Among
five clusters, the highest inter-cluster distance was observed between cluster I and
cluster TI and the lowest between cluster Ill and cluster IV. Considering all the
characters the 67 (1313-8832). G (1113-7985), G3(1313-8034) and G15 (BD-8816)
were selected for thture breeding programme.
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
IN
GENETICS AND PLANT BREEDING
SEMESTER: Jan-Jun, 2010
2010-06-01T00:00:00Z