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Development of hybrid genotypes more need to increase the edible
oil production and it qulity traits because of increasing the human
population. Eight genotypes (Golarchi, Star, Range, DGL, Ayub2000,
Hybripol, Lagena and BA0714.) were crossed in Line x Tester mating
design (5x3). and their F1s were sown in field in RCBD with three
replications. Data of 15 F1s and their parents were recorded for
various seed yield and yield contributing traits. The data were
statistically analyzed for analysis of variance and LxT analysis.
The ANOVA for combining ability were revealed that the mean sum of
squares due to lines were significant for all traits except days to
90% flowering and for testers the mean sum of square were
significant for all traits except days to 90% flowering and 1000
seed weight. Highly significant results were found in LxT
interaction for all traits. The estimates of SCA variance was
noticed higher than GCA variance in all traits. The contributions
of lines as compared to testers were greater in case of all the
traits of Brassica napus."
Development of hybrid genotypes/ high yielded varieties more demand
to fill the gap between food production and human
population.Heterosis and Combining Ability Studies in Brassica
napus leads to develop the hybrid genotypes/ Varieties which will
be produce more seed yield, plant biomass(fodder or Saag), oil
contents, protein contents and canola type traits for good
health.In an experiment Sixteen genotypes were crossed among eleven
lines and five testers in Line x Tester mating design (11x5),55 F1
were made and Data of hybrids and their parents were recorded for
various seed yield and yield contributing traits. The results
revealed that highly significant values were found in line x tester
interaction for all the traits except the character days taken to
50% maturity. The estimates of SCA variance was noticed higher than
GCA variance in all the recorded traits.The significant potence
ratio were explained that the transformation of desirable gene in
all the recorded traits of genotypes in dominance type of gene
action for the development of hybrids or varieties in Brassica
napus."
Sugarcane is one of the major sugar crops of the world. In
Pakistan, it occupies a significant position in the agricultural
economy. The present investigations were carried out to examine the
genetic variability and contribution of some morphological
characters for cane yield and response of genotypes of sugar cane
toward callus formation, regeneration and screening for virus. The
results pertaining to analysis of variance elucidated highly
significant differences among the accessions for all the traits.
The tissue culture study revealed that at different treatment over
all performance of HSF-247 was better for callus induction and
genotype HSF-242 performed best at 3mg/l of 2, 4-D level. All the
investigation in the correlation study proved quite successful
because a handful increase in cane weight and plant height is
possible as they provide information regarding a suitable
combination of characters with their maximum influence on the
enhancement of cane weight and plant height. The clone will be
selected with such combinations of characters which to give maximum
improvement in their cane yield.
Sugarcane is a major cash crop of the world and occupies
significant position in agricultural economy of Pakistan Study on
correlation and path coefficient analysis on ratoon crop for cane
yield and yield related traits in 20 accessions of sugarcane
(Saccharum officinarum L.) was conducted in the field of the
Department of Plant Breeding and Genetics, University of
Agriculture, Faisalabad, during the 2008-09.Analysis of variance
indicated highly significant differences among the accessions for
all the traits. Among the traits plant height, leaf area, dry
matter contents, bagasse weight and cane yield had the positive and
significant correlation with brix value at genotypic level.
Molecular markers are useful for assessment of variation and
phylogenetic relationships. Out of 30 fragments amplified with 15
primers used among the 10 sugarcane somaclones and a parent plant,
only 3 bands were polymorphic while rest of the 27 bands were
monomorphic. Therefore, it may be concluded from the present
results that SSR markers can be used for the identification of
somaclonal variation and the relationship between parents and
somaclones.
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