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Genetic Variabilitry in Bottle Gourd ( Lagenaria Siceraria (Mol.) Standl.) in Relation to Yield and Yield Attributes
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 objective...
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| Format: | Ph.D Thesis |
| Language: | Undetermined |
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Vellanikkara
Department of Olericulture, College of Horticulture
1999
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| 082 | |a 635.6 |b ANN/GE | ||
| 100 | |a Annie Mathew | ||
| 245 | |a Genetic Variabilitry in Bottle Gourd ( Lagenaria Siceraria (Mol.) Standl.) in Relation to Yield and Yield Attributes | ||
| 260 | |a Vellanikkara |b Department of Olericulture, College of Horticulture |c 1999 | ||
| 502 | |b MSc | ||
| 520 | 3 | |a 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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