Growth, Morphological and Genetic Variation of Azadlrachta Excelsa (Jack) Jacobs Genotypes
A study was made on six seed sources of Azadirachta excelsa Jack) Jacobs at ages one and two years at two different locations, i.e. Rantau Panjang (Selangor) and Merchang (Terengganu) to determine the patterns of interand intra-specific variation in growth, genetic and morphological characterist...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2001
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10074/1/FH_2001_24.pdf |
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| Summary: | A study was made on six seed sources of Azadirachta excelsa Jack) Jacobs at
ages one and two years at two different locations, i.e. Rantau Panjang
(Selangor) and Merchang (Terengganu) to determine the patterns of interand
intra-specific variation in growth, genetic and morphological
characteristics of this species. Measurements of survival, height, basal
diameter (BD) and diameter breast height (DBH) were made on all trees at
ages one and two years after planting in the field. Five characteristics of leaf
morphology, i.e. leaf shape, leaf margin, leaf base, leaf angle and internode
were also analysed for seed source variation. In addition, 19 enzyme systems
were used to determine the genetic variation among seed sources using
isozyme analysis.
All the seed sources survived well during the first year with 91.25% in
Rantau Panjang and 70.00% in Merchang but the survival reduced to 86.45%
and 41.33% respectively during the second year. The mean height values
ranged from 126.85 cm to 209.38 cm in Rantau Panjang and 49.76 cm to 72.19 cm in Merchang during the first year, and 212.83 cm to 367.07 cm in Rantau
Panjang and 85.40 cm to 156.16 cm in Merchang during the second year.
Whereas, the mean values of BD ranged from 2.04 em to 3.40 em in Rantau
Panjang and 0.64 em to 0.87 em in Merchang during the first year, and 3.33
cm to 5.65 em in Rantau Panjang and 0.97 em to 1.54 em in Merchang during
the second year. Meanwhile, the mean values of DBH for the first and second
years ranged from 0.85 cm to 2.23 cm and 1.94 cm to 3.98 cm in Rantau
Panjang respectively while in Merchang, the mean values of DBH ranged
from 0.53 to 0.93 for second year. |
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