Provenance Evaluation In The seedling Characters of Neem (Azadirachta IndicaA.Juss)
By: Vinod S.
Contributor(s): Vijayakumar N K(Guide).
Material type:
BookPublisher: Vellanikkara Department of Tree Physiology and Breeding, College of Forestry 1997DDC classification: 634.9 Online resources: Click here to access online | Click here to access online Dissertation note: MFSc Abstract: A study was conducted at College of Forestry, Vellanikkara, Trichur on
provenance evaluation in the seedling characters of neem (Azadirachta indica
A. Juss) for a period of one year from 1995 to 1996. The experiment was laid
out in a completely randomised design. A total of eight provenances were
used in this study they are Dindigul, Nagarcoil, Coimbatore, Trichur,
Srivelliputhur, Palghat, Ghatti Subramanya and Molakalmur.
In respect of various seed characters studied Nagarcoil was the best
performer in characters like 100 seed weight, seed breadth and germination
percentage. Trichur was the best performer in seed length and seed length
breadth ratio and Srivelliputhur was the best performer in thickness of pericarp.
In terms of various seedling characters studied Coimbatore was the best
performer in height, leaf number, leaf area, stem dry weight, leaf dry weight,
and shoot dry weight. Palghat provenance was superior with respect to root
dry weight, and root shoot ratio; Nagarcoil was the best in terms of collar girth
and Dindigul in total dry weight. Nevertheless, Coimbatore provenance was
found to be the best performer in most of the seedling character studied.
Isozyme banding pattern for peroxidase showed two bands PRX-1 and
PRX-3 in common. Eight provenances were grouped in to two based on the
presence or absence of PRX-2.
No significant variation was observed in terms of chlorophyll - A, Band
total chlorophyll content between provenances. Number of stomata per square
centimetre was maximum in Coimbatore provenance.
For the genetic characters studied 100 seed weight and germination
percentage recorded maximum GCV and PCV for seed characters and shoot
weight and shoot root ratio for seedling characters. Maximum heritability and
genetic gain were recorded in germination percentage and height and collar
girth in seedling characters.
Application of Mahalanobis' D2 statistics and Tocher's method of
clustering resolved eight provenances in to four distinct clusters. Cluster I
comprising of three provenances (Dindigul, Palakkadu and Ghatti Subramanya).
Cluster II comprising of only one cluster (Coimbatore), cluster III comprising of
again only one cluster (Molakalmur) and cluster IV comprising of three
provenances (Nagarcoil, Trichur and Srivelliputhur).
Incidence of pests was not noticed during the entire period of
investigation. All provenances were found affected by sooty mold caused by
Capnodium sp. during the rainy seasons with out affecting the growth
of the seedlings.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 634.9 VIN/PR (Browse shelf) | Available | 171309 |
MFSc
A study was conducted at College of Forestry, Vellanikkara, Trichur on
provenance evaluation in the seedling characters of neem (Azadirachta indica
A. Juss) for a period of one year from 1995 to 1996. The experiment was laid
out in a completely randomised design. A total of eight provenances were
used in this study they are Dindigul, Nagarcoil, Coimbatore, Trichur,
Srivelliputhur, Palghat, Ghatti Subramanya and Molakalmur.
In respect of various seed characters studied Nagarcoil was the best
performer in characters like 100 seed weight, seed breadth and germination
percentage. Trichur was the best performer in seed length and seed length
breadth ratio and Srivelliputhur was the best performer in thickness of pericarp.
In terms of various seedling characters studied Coimbatore was the best
performer in height, leaf number, leaf area, stem dry weight, leaf dry weight,
and shoot dry weight. Palghat provenance was superior with respect to root
dry weight, and root shoot ratio; Nagarcoil was the best in terms of collar girth
and Dindigul in total dry weight. Nevertheless, Coimbatore provenance was
found to be the best performer in most of the seedling character studied.
Isozyme banding pattern for peroxidase showed two bands PRX-1 and
PRX-3 in common. Eight provenances were grouped in to two based on the
presence or absence of PRX-2.
No significant variation was observed in terms of chlorophyll - A, Band
total chlorophyll content between provenances. Number of stomata per square
centimetre was maximum in Coimbatore provenance.
For the genetic characters studied 100 seed weight and germination
percentage recorded maximum GCV and PCV for seed characters and shoot
weight and shoot root ratio for seedling characters. Maximum heritability and
genetic gain were recorded in germination percentage and height and collar
girth in seedling characters.
Application of Mahalanobis' D2 statistics and Tocher's method of
clustering resolved eight provenances in to four distinct clusters. Cluster I
comprising of three provenances (Dindigul, Palakkadu and Ghatti Subramanya).
Cluster II comprising of only one cluster (Coimbatore), cluster III comprising of
again only one cluster (Molakalmur) and cluster IV comprising of three
provenances (Nagarcoil, Trichur and Srivelliputhur).
Incidence of pests was not noticed during the entire period of
investigation. All provenances were found affected by sooty mold caused by
Capnodium sp. during the rainy seasons with out affecting the growth
of the seedlings.
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