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Genetic Variabilitry in Bottle Gourd ( Lagenaria Siceraria (Mol.) Standl.) in Relation to Yield and Yield Attributes

By: Annie Mathew.
Contributor(s): Baby Lissy Markose (Guide).
Material type: materialTypeLabelBookPublisher: Vellanikkara Department of Olericulture, College of Horticulture 1999DDC classification: 635.6 Online resources: Click here to access online | Click here to access online Dissertation note: MSc Abstract: The research project 'Genetic. variability in bottle gourd (Lagenaria siceraria [Mol.] Standl.) in relation to yield and yield attributes' was earned out in the College of Horticulture, Kerala Agricultural University, Vellanikkara, Thrissur during the period 1998-99. The major objectives of the study were to genetically catalogue the available germplasm and to study the genetic variability, divergence, heritability, genetic gain and correlation of different traits with yield. Twenty eight accessions collected from different parts of the country were grown in randomised block design with two replications. The 28 accessions were catalogued based on the descriptor for bottle gourd. Significant differences for the characters vine length, number of primary branches, days to first female flower opening, nodes to first female flower, sex ratio, number of fruits per plant, fruit yield per plant, length of fruit, girth of fruit, 100 seed weight, number of seeds per fruit and crude fibre content were noticed among the accessions. The accession LS 14 was found to be the highest yielding and accession LS 23 was found to be the earliest flowering. Highest genotypic coefficient of variation and phenotypic coefficient of variation was observed for number of fruits per plant. High heritability coupled with genetic gain was noted for vine length, number of primary branches, nodes to first female flower, length of fruit, girth of fruit and number of seeds per fruit. Yield was found to be significantly and positively correlated with duration of crop and number of fruits per plant. The 28 accessions were grouped into eight clusters and no parallelism between geographical d~stribution and genetic diversity was noted. A selection model was formulated consisting of the characters yield per plant, fruit set percentage and duration of crop. Accession LS 14 was identified as the most superior one followed by accessions LS 23, LS 8 and LS 4.
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MSc

The research project 'Genetic. variability in bottle gourd (Lagenaria
siceraria [Mol.] Standl.) in relation to yield and yield attributes' was earned out in
the College of Horticulture, Kerala Agricultural University, Vellanikkara, Thrissur
during the period 1998-99. The major objectives of the study were to genetically
catalogue the available germplasm and to study the genetic variability, divergence,
heritability, genetic gain and correlation of different traits with yield. Twenty eight
accessions collected from different parts of the country were grown in randomised
block design with two replications.
The 28 accessions were catalogued based on the descriptor for bottle
gourd. Significant differences for the characters vine length, number of primary
branches, days to first female flower opening, nodes to first female flower, sex
ratio, number of fruits per plant, fruit yield per plant, length of fruit, girth of fruit,
100 seed weight, number of seeds per fruit and crude fibre content were noticed
among the accessions. The accession LS 14 was found to be the highest yielding
and accession LS 23 was found to be the earliest flowering.
Highest genotypic coefficient of variation and phenotypic coefficient of
variation was observed for number of fruits per plant. High heritability coupled
with genetic gain was noted for vine length, number of primary branches, nodes to
first female flower, length of fruit, girth of fruit and number of seeds per fruit.
Yield was found to be significantly and positively correlated with duration of crop
and number of fruits per plant. The 28 accessions were grouped into eight clusters
and no parallelism between geographical d~stribution and genetic diversity was
noted.
A selection model was formulated consisting of the characters yield per
plant, fruit set percentage and duration of crop. Accession LS 14 was identified as
the most superior one followed by accessions LS 23, LS 8 and LS 4.

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