Genetic Variation of Coconut Tall (Cocos nucifera L., Arecaceae) in Bali, Indonesia Based on Microsatellite DNA.
Journal of Biology, Agriculture and Healthcare
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Genetic Variation of Coconut Tall (Cocos nucifera L., Arecaceae)
in Bali, Indonesia Based on Microsatellite DNA.
Eniek Kriswiyanti*, I Gede Rai Maya Temaja**, I Made Sudana**
and I Gusti Ngurah Alit Susanta Wirya**
*Post Graduate Student of Agriculture Faculty and Department of Biology Mathc and Natural Science Faculty ,
Udayana University Campus Bukit Jimbaran, Kuta Bali Indonesia ** Faculty of Agriculture, Udayana
University Campus Sudirman, Denpasar, Bali Indonesia
Corresponding author, Email : eniek_kriswiyanti@yahoo.co.id
The research was funded by Director General of Higher Education, Ministry of Education and Culture of
Republic Indonesia (grant of Doctorate Student) and Udayana University, Bali Indonesia
Abstract
The coconut has important roles for economics, traditional medicine and culture, especially for Hindu’s
ceremonial purpose in Bali Island (Indonesia). Each coconut cultivar has unique characteristics. The aimed of
this research was to determine genetic variation of coconut tall (Cocos nucifera L., Arecaceae) in Bali, based on
DNA microsatellite. Six pairs microsatellite markers were used to determine heterozygosity.
The results showed that total of 80 alleles were detected by microsatellite with an average of 13.33 alleles per
locus, there were 12 alleles on microsatellite locus CnCirA3, 12 alleles on locus CnCirC3, 16 alleles on locus
CNZ05, 14 alleles on CNZ09 , 17 alleles on CNZ21, and 9 alleles on microsatellite primer pairs CNZ51. The
mean values of gene diversity (He) and observed heterozygosity (Ho) were 0.8835 and 0.5421, respectively.
The highest heterozigosity was on bulan tall coconuts cultivar (0.816), the lowest heterozygosity was on bluluk
tall coconuts (0.35).
Keywords: unique characteristic, microsatellite, allele, heterozygosity, coconut
1.Introduction
Coconut (Cocos nucifera L.) is one of the primary sources of income for most Indonesian farmers. Coconut fruit
is processed into various products like vegetable oil, raw material for food, industry, medicine, cosmetic and
oleo chemicals. Total land area plantation of coconut is about 3.7 million hectares, with 97% of overall
production from farmers (Novarianto, et al., 2005). In Bali, beside of its economic value, parts of coconut tree
(leaves, fruit, young flower) also used for ceremonial and medicinal purposes, which called “nyuh madan” .
Morphologically, some coconut plants differ in some characters, which is very unique and specific to its
individual plant. Based on the unique characters, there were more than twenty unique coconuts identified that
differ individually. Some of them are ancak which has branches on its trunk; the be julit has plicated lamina
leaves, the bingin ‘s root grow from nodes of stem, the Bojog ‘s fruit husk is colored like the hair of long tailed
monkey. Differences in fruit color such as white, green, yellow and red were used to distinguish between the
bulan, gadang, gading and surya coconuts respectively. Inflorenscentia spicata was characteristic of bluluk,
while the udang and mulung were characterized by red mesocarpium. The Rangda coconut has petiole and the
apex of the stem were twisted. The sudamala was characterized by many kinds of unique characters, which some
of them are doubled spatha, and flat apex of male spikelet (Kriswiyanti, 2012).
To study its genetic diversity, simple sequence repeats (SSR) microsatellite markers were used. This technique
had been used successfully by many scientists to characterize the genetic diversity of the coconut population
(Perera et al. 2001; Manimekalai and Nagarajan 2006; Kumar et al., 2011). The microsatellite analysis of the 9
coconut populations with 8 primers revealed a total of 37 alleles (Devakumar et.al., 2010). From the used 26
SSR markers, detected a total of 188 alleles with an average of 7.23 per locus (Liu, et.al., 2011). In this
research, genetic variation of tall coconut (Cocos nucifera L., Arecaceae) was determined based on DNA
microsatellite, using alleles size on each individual of tall coconut. The alleles data from each accession can be
applied to predict natural breeding for unique coconut conservation purpose.
Materials and Methods
Plant material used: Leaf samples were collected from Klungkung, Bangli, Karangasem, Gianyar, Tabanan,
Badung, Jembrana residence and Denpasar, Bali province, Indonesia. Of the 58 samples from twenty cultivars
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were ‘tall coconut’ category (nyuh ancak, biasa, bulan, bingin, gadang, gading, kebo, srogsogan, mulung,
rangda, bluluk, sudamala, surya, udang, kapas, be julit, bojog, macan, naga, pudak ). DNA extraction and
detection of microsatellite
polymorphisms were analysed at Forensics and Primata Laboratory Udayana
University, Bali Indonesia.
DNA extraction: DNA was extracted from fresh coconut young leaves using a CTAB based protocol modified
from Doyle and Doyle (1987). The primer sequences and associated information are given in Table 1 (Pandin,
et.al., 2008).
SSR analysis
Polymerase Chain Reactions (PCR) assay and gel analysis : DNA was amplified in 13 μ L reactions containing
2 μ L sample, 3.5 μ L H2O, 6.5 μ L Mastermix (Qiagen), and 1 μ L primer. The PCR programmed for 30 cycles of
45 seconds each at 94°C, 1 min at the different annealing temperatures standardized for the individual SSR
locus, and extension for 1 min 30 seconds at 72°C. The first cycle was preceded by a 5 min denaturation at 94°C
and the last cycle ended with 5 min extension at 72° C. Reaction products were separated on 6% polyacrylamide
(denatured) and visualized with silver nitrate staining (Tegelstorm, 1984).The alleles were scored based on the
size of each PCR amplified fragment by electrophoresis all samples in a single gel. Allele size were determined
by semilog plotting of distance migration of amplicon on PAGE (Hutchinson, 2001). Diversity values based on
allele frequencies were calculated for each microsatelite locus and coconut cultivar using Nei’s methods (1987).
Table .1 Details of microsatelites primer used in the analysis
Urutan Basa
Primer
Forward (5’-3’)
Riverse (5’ – 3’)
CNZ 05
CTTATCCAAATCGTCACAGAG
AGGAGAAGCCAGGAAAGATTT
CNZ 09
ATCTACCAGTGTGGTCCTCTC
ACCAGGAAAAAGAGCGGAGAA
CNZ 21
ATGTTTTAGCTTCACCATGAA
TCAAGTTCAAGAAGACCTTTG
CNZ51
CTTTAGGGAAAAAGGACTGAG
ATCCATGAGCTGAGCTTGAAC
CnCir A3
AATCTAAATCTACGAAAGCA
AATAATGTGAAAAAGCAAAG
CnCir C3
AGAAAGCTGAGAGGGAGGATT
GTGGGGCATGAAAAGTAAC
Results
From 58 extracted DNA samples, some sample were successfully amplified on each primer used. For examples
locus CNZ09 on figure 1, C and D were not successfully amplified.
Figure 1. An example of allelic polymorphisme at microsatellite locus CNZ09 in 12 individuals coconut tall
from some village in Bali island . A.Be Julit tall Babung, B Be Julit tall Buruan, C Be Julit tall Tuwed D. Be
Julit tall Tamblang, E.Biasa tall Pejeng, F.Bingin tall Jelekungkang, G.Bingin tall Babung, H. Biasa tall
Babung, I.Ancak tall Pikat, J.Surya tall Jelekungkang, K.Gadang tall Babung, L.Rangda tall Babung
Genetic Variation (Heterozigosity)
Total number of investigated alleles, number alleles, heterozygosity, and variation alleles length of twenty tall
coconut cultivars for each SSR locus were showed in Table1. The combination of six SSR loci generated a total
of 80 alleles, with a mean of 13.33 allele per locus and ranging from nine (CNZ51) to seventeen alleles
(CNZ21).
Gene diversity range from 0.8561 for the loci CNZ51 to 0.9204 for the loci CNZ21, with an overall mean
0.8835. The loci CnCirC3 and CNZ05 presented the lowest (0.45) and the highest value (0.7619) respectively,
for observed heterozygosity, with a mean value of 0.5421.
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Table 1. Number of alleles per locus, heterozigosity and variation in allele length of
Bali tall coconut, using 6 SSR loci
Gene
diversity/
Number of
Observed
Expected
amplified
Heterozygosity
Number
of Heterozygosity
samples
(Ho)
(He±SE)
Primer
allele
CnCirA3
32
12
0.8922±0.0001
0.4687
CnCirC3
40
12
0.862±0.0005
0.45
CNZ05
42
16
0.9093±0.0012
0.7619
CNZ09
47
14
0.8612±0.0003
0.4893
CNZ21
42
17
0.9204±0.0002
0.5714
CNZ51
43
9
0.8561 ±0.0005
0.5116
Mean±SD
13.333±2.9
0.8835±0.027
0.5421
Heterozygosity among the coconut cultivars was showed in Table 2. The expected heterozygosity range 0.35 (
Bluluk tall) to 0.8166 (Bulan tall), with a mean of 0.5941.
The highest heterozygosity was in Bulan tall (0.776) and the lowest value in Pudak tall and Kapas tall (0.33).
Table 2. Description and heterozigosity of tall coconuts from Bali, Indonesia
Coconut
Number
Name
of
Expected
Observed
sample
Description
Heterozigosity
Heterozigosity
(He) ± SD
(Ho)
Ancak tall
branched trunk
0.6458
0.2186
0.5766
3
Bejulit tall
plicated lamina of young leaves
0.5989
0.163
0.6833
3
Biasa tall
Ordinary tall
0.4835
0.351
0.264
3
Bingin tall
0.6331
0.259
0.6067
3
Bojog tall
the root growth from nodes trunk
fruit husk colored like the hair of long
tailed monkey
0.6043
0.177
0.4716
Bulan tall
White fruit
0.8166
0.154
0.776
3
Gadang tall
Green fruit with sweet water
0.6777
0.333
0.6067
3
Gading tall
Srogsogan
tall
Golden yellow fruit
0.8042
0.2106
0.526
3
Damage endosperm = kopyor
0.4525
0.225
0.36
Mulung tall
Green fruit with red mesocarp
petiole and the apex of the stem were
twisted
0.5805
0.2061
0.608
0.4199
0.363
0.358
0.418
0.415
Sudamala
tall
Inflorescentia spicata
0.35
Double spatha, reduction of some
male spikelet , tip of primordial
leaves like hook
0.6833
0.178
0.553
Surya tall
Red fruit and tip lamina (old)
0.7137
0.208
0.555
3
Udang tall
Brown fruit with red mesocarp
0.6102
0.131
0.34
3
Kapas tall
Edible white husk (immature)
0.4166
0.52
0.333
2
Kebo tall
Small nut with thick husk
0.6498
0.392
0.5
3
Macan tall
Black spot on fruit skin
0.6748
0.186
0.416
3
Naga tall
Green fruit colour, angled of stem
0.6833
0.2185
0.4666
3
Pudak tall
Brown fruit colour, spatha>2
0.3832
0.525
0.33
2
Rangda tall
Bluluk tall
3
3
3
3
Mean
0.5941
10
41
4
3
0.4872
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Discussion
The alleles size of several locus from tall coconut that explored during this research differed to that found in
other studies of coconut tree population using same SSR markers. Alleles size on locus CnCirA3 range 210-280
bp, with highest frequency on 255bp allele (0,203). Rajesh et.al.,(2008) and Ribeiro et al (2010) found 228240bp alleles sizes. The alleles sizes on the CNZ21 locus that range 180-300bp with highest frequency on 240
bp (0,207), on locus CNZ51 range 110-230 bp with the highest frequency 0,221 on 140 and 160 bp. Pandin et al
(2009) found 270bp on loci CNZ21 and 110bp on loci CNZ5 .
Total alleles were found in this research were 80 elleles , with range 9-17 alleles and mean values was 13,3.
This result had more variation than others. Perera et al. (2001) found 56 alleles sizes range 3-10 on 33 samples
coconut in Srilangka used 8 loci. Thirty seven alleles were found on tall and dwarf from nine population from
Agatti and Kavaratti Island, Lakshadweep, India (Devakumar et.al., 2010).
Other research that used 8
microatellites loci from 14 accession from Kidu India coconut population, found 28 alleles with mean two alleles
per locus (Kumar et al., 2011). Overall, genetic diversity in tall coconuts in Bali was very high (Table 1). Mean
values of gene diversity (He) and observed heterozygosity (Ho) were 0.8835 and 0.5421, respectively. The
highest expected heterozygosity was on loci CNZ21 (0.9204), and the lowest gene diversity on CNZ51 (0.8561).
Genetic variation found in this result higher than others research, e.g research coconut population in Brazil,
Phillipina, India, Sri Langka (Perera et al, 2003; Devakumar et al., 2010; Liu, at al.,2011; Xiao, et al., 2013).
Genetic variation on the tall coconut cultivars range value 0.35-0.8166 (Table 2),
high expected
heterozygosity on bulan tall (0.816), and lowest on bluluk tall (0.35). The estimate of heterozygosity was high
(0.590) for Laccadive Micro Tall and Laccadive Small Tall was lowest (0,240) (Devakumar, et.al 2010).
Genetic diversity of 10 coconut accessions from six location in Hainan province, China; expected heterozygosity
of Haikou Green Tall accession was significantly higher (0.4753) than other tall type (Liu et al., 2011)
Higher heterozygosity was determined by number of alleles variation and frequency. Higher diversity in
tall coconuts in Bali, Indonesia was caused by germplasm variation or natural mutation.
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Table of Contents
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Comparison of Informational Needs among Newly Diagnosed Breast Cancer Women
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160166
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Sexava Nubila Behavioral Analysis In Every Changes Of Imitation Sound From Level PDF
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173
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Genetic Variation of Coconut Tall (Cocos nucifera L., Arecaceae)
in Bali, Indonesia Based on Microsatellite DNA.
Eniek Kriswiyanti*, I Gede Rai Maya Temaja**, I Made Sudana**
and I Gusti Ngurah Alit Susanta Wirya**
*Post Graduate Student of Agriculture Faculty and Department of Biology Mathc and Natural Science Faculty ,
Udayana University Campus Bukit Jimbaran, Kuta Bali Indonesia ** Faculty of Agriculture, Udayana
University Campus Sudirman, Denpasar, Bali Indonesia
Corresponding author, Email : eniek_kriswiyanti@yahoo.co.id
The research was funded by Director General of Higher Education, Ministry of Education and Culture of
Republic Indonesia (grant of Doctorate Student) and Udayana University, Bali Indonesia
Abstract
The coconut has important roles for economics, traditional medicine and culture, especially for Hindu’s
ceremonial purpose in Bali Island (Indonesia). Each coconut cultivar has unique characteristics. The aimed of
this research was to determine genetic variation of coconut tall (Cocos nucifera L., Arecaceae) in Bali, based on
DNA microsatellite. Six pairs microsatellite markers were used to determine heterozygosity.
The results showed that total of 80 alleles were detected by microsatellite with an average of 13.33 alleles per
locus, there were 12 alleles on microsatellite locus CnCirA3, 12 alleles on locus CnCirC3, 16 alleles on locus
CNZ05, 14 alleles on CNZ09 , 17 alleles on CNZ21, and 9 alleles on microsatellite primer pairs CNZ51. The
mean values of gene diversity (He) and observed heterozygosity (Ho) were 0.8835 and 0.5421, respectively.
The highest heterozigosity was on bulan tall coconuts cultivar (0.816), the lowest heterozygosity was on bluluk
tall coconuts (0.35).
Keywords: unique characteristic, microsatellite, allele, heterozygosity, coconut
1.Introduction
Coconut (Cocos nucifera L.) is one of the primary sources of income for most Indonesian farmers. Coconut fruit
is processed into various products like vegetable oil, raw material for food, industry, medicine, cosmetic and
oleo chemicals. Total land area plantation of coconut is about 3.7 million hectares, with 97% of overall
production from farmers (Novarianto, et al., 2005). In Bali, beside of its economic value, parts of coconut tree
(leaves, fruit, young flower) also used for ceremonial and medicinal purposes, which called “nyuh madan” .
Morphologically, some coconut plants differ in some characters, which is very unique and specific to its
individual plant. Based on the unique characters, there were more than twenty unique coconuts identified that
differ individually. Some of them are ancak which has branches on its trunk; the be julit has plicated lamina
leaves, the bingin ‘s root grow from nodes of stem, the Bojog ‘s fruit husk is colored like the hair of long tailed
monkey. Differences in fruit color such as white, green, yellow and red were used to distinguish between the
bulan, gadang, gading and surya coconuts respectively. Inflorenscentia spicata was characteristic of bluluk,
while the udang and mulung were characterized by red mesocarpium. The Rangda coconut has petiole and the
apex of the stem were twisted. The sudamala was characterized by many kinds of unique characters, which some
of them are doubled spatha, and flat apex of male spikelet (Kriswiyanti, 2012).
To study its genetic diversity, simple sequence repeats (SSR) microsatellite markers were used. This technique
had been used successfully by many scientists to characterize the genetic diversity of the coconut population
(Perera et al. 2001; Manimekalai and Nagarajan 2006; Kumar et al., 2011). The microsatellite analysis of the 9
coconut populations with 8 primers revealed a total of 37 alleles (Devakumar et.al., 2010). From the used 26
SSR markers, detected a total of 188 alleles with an average of 7.23 per locus (Liu, et.al., 2011). In this
research, genetic variation of tall coconut (Cocos nucifera L., Arecaceae) was determined based on DNA
microsatellite, using alleles size on each individual of tall coconut. The alleles data from each accession can be
applied to predict natural breeding for unique coconut conservation purpose.
Materials and Methods
Plant material used: Leaf samples were collected from Klungkung, Bangli, Karangasem, Gianyar, Tabanan,
Badung, Jembrana residence and Denpasar, Bali province, Indonesia. Of the 58 samples from twenty cultivars
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were ‘tall coconut’ category (nyuh ancak, biasa, bulan, bingin, gadang, gading, kebo, srogsogan, mulung,
rangda, bluluk, sudamala, surya, udang, kapas, be julit, bojog, macan, naga, pudak ). DNA extraction and
detection of microsatellite
polymorphisms were analysed at Forensics and Primata Laboratory Udayana
University, Bali Indonesia.
DNA extraction: DNA was extracted from fresh coconut young leaves using a CTAB based protocol modified
from Doyle and Doyle (1987). The primer sequences and associated information are given in Table 1 (Pandin,
et.al., 2008).
SSR analysis
Polymerase Chain Reactions (PCR) assay and gel analysis : DNA was amplified in 13 μ L reactions containing
2 μ L sample, 3.5 μ L H2O, 6.5 μ L Mastermix (Qiagen), and 1 μ L primer. The PCR programmed for 30 cycles of
45 seconds each at 94°C, 1 min at the different annealing temperatures standardized for the individual SSR
locus, and extension for 1 min 30 seconds at 72°C. The first cycle was preceded by a 5 min denaturation at 94°C
and the last cycle ended with 5 min extension at 72° C. Reaction products were separated on 6% polyacrylamide
(denatured) and visualized with silver nitrate staining (Tegelstorm, 1984).The alleles were scored based on the
size of each PCR amplified fragment by electrophoresis all samples in a single gel. Allele size were determined
by semilog plotting of distance migration of amplicon on PAGE (Hutchinson, 2001). Diversity values based on
allele frequencies were calculated for each microsatelite locus and coconut cultivar using Nei’s methods (1987).
Table .1 Details of microsatelites primer used in the analysis
Urutan Basa
Primer
Forward (5’-3’)
Riverse (5’ – 3’)
CNZ 05
CTTATCCAAATCGTCACAGAG
AGGAGAAGCCAGGAAAGATTT
CNZ 09
ATCTACCAGTGTGGTCCTCTC
ACCAGGAAAAAGAGCGGAGAA
CNZ 21
ATGTTTTAGCTTCACCATGAA
TCAAGTTCAAGAAGACCTTTG
CNZ51
CTTTAGGGAAAAAGGACTGAG
ATCCATGAGCTGAGCTTGAAC
CnCir A3
AATCTAAATCTACGAAAGCA
AATAATGTGAAAAAGCAAAG
CnCir C3
AGAAAGCTGAGAGGGAGGATT
GTGGGGCATGAAAAGTAAC
Results
From 58 extracted DNA samples, some sample were successfully amplified on each primer used. For examples
locus CNZ09 on figure 1, C and D were not successfully amplified.
Figure 1. An example of allelic polymorphisme at microsatellite locus CNZ09 in 12 individuals coconut tall
from some village in Bali island . A.Be Julit tall Babung, B Be Julit tall Buruan, C Be Julit tall Tuwed D. Be
Julit tall Tamblang, E.Biasa tall Pejeng, F.Bingin tall Jelekungkang, G.Bingin tall Babung, H. Biasa tall
Babung, I.Ancak tall Pikat, J.Surya tall Jelekungkang, K.Gadang tall Babung, L.Rangda tall Babung
Genetic Variation (Heterozigosity)
Total number of investigated alleles, number alleles, heterozygosity, and variation alleles length of twenty tall
coconut cultivars for each SSR locus were showed in Table1. The combination of six SSR loci generated a total
of 80 alleles, with a mean of 13.33 allele per locus and ranging from nine (CNZ51) to seventeen alleles
(CNZ21).
Gene diversity range from 0.8561 for the loci CNZ51 to 0.9204 for the loci CNZ21, with an overall mean
0.8835. The loci CnCirC3 and CNZ05 presented the lowest (0.45) and the highest value (0.7619) respectively,
for observed heterozygosity, with a mean value of 0.5421.
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Table 1. Number of alleles per locus, heterozigosity and variation in allele length of
Bali tall coconut, using 6 SSR loci
Gene
diversity/
Number of
Observed
Expected
amplified
Heterozygosity
Number
of Heterozygosity
samples
(Ho)
(He±SE)
Primer
allele
CnCirA3
32
12
0.8922±0.0001
0.4687
CnCirC3
40
12
0.862±0.0005
0.45
CNZ05
42
16
0.9093±0.0012
0.7619
CNZ09
47
14
0.8612±0.0003
0.4893
CNZ21
42
17
0.9204±0.0002
0.5714
CNZ51
43
9
0.8561 ±0.0005
0.5116
Mean±SD
13.333±2.9
0.8835±0.027
0.5421
Heterozygosity among the coconut cultivars was showed in Table 2. The expected heterozygosity range 0.35 (
Bluluk tall) to 0.8166 (Bulan tall), with a mean of 0.5941.
The highest heterozygosity was in Bulan tall (0.776) and the lowest value in Pudak tall and Kapas tall (0.33).
Table 2. Description and heterozigosity of tall coconuts from Bali, Indonesia
Coconut
Number
Name
of
Expected
Observed
sample
Description
Heterozigosity
Heterozigosity
(He) ± SD
(Ho)
Ancak tall
branched trunk
0.6458
0.2186
0.5766
3
Bejulit tall
plicated lamina of young leaves
0.5989
0.163
0.6833
3
Biasa tall
Ordinary tall
0.4835
0.351
0.264
3
Bingin tall
0.6331
0.259
0.6067
3
Bojog tall
the root growth from nodes trunk
fruit husk colored like the hair of long
tailed monkey
0.6043
0.177
0.4716
Bulan tall
White fruit
0.8166
0.154
0.776
3
Gadang tall
Green fruit with sweet water
0.6777
0.333
0.6067
3
Gading tall
Srogsogan
tall
Golden yellow fruit
0.8042
0.2106
0.526
3
Damage endosperm = kopyor
0.4525
0.225
0.36
Mulung tall
Green fruit with red mesocarp
petiole and the apex of the stem were
twisted
0.5805
0.2061
0.608
0.4199
0.363
0.358
0.418
0.415
Sudamala
tall
Inflorescentia spicata
0.35
Double spatha, reduction of some
male spikelet , tip of primordial
leaves like hook
0.6833
0.178
0.553
Surya tall
Red fruit and tip lamina (old)
0.7137
0.208
0.555
3
Udang tall
Brown fruit with red mesocarp
0.6102
0.131
0.34
3
Kapas tall
Edible white husk (immature)
0.4166
0.52
0.333
2
Kebo tall
Small nut with thick husk
0.6498
0.392
0.5
3
Macan tall
Black spot on fruit skin
0.6748
0.186
0.416
3
Naga tall
Green fruit colour, angled of stem
0.6833
0.2185
0.4666
3
Pudak tall
Brown fruit colour, spatha>2
0.3832
0.525
0.33
2
Rangda tall
Bluluk tall
3
3
3
3
Mean
0.5941
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0.4872
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Discussion
The alleles size of several locus from tall coconut that explored during this research differed to that found in
other studies of coconut tree population using same SSR markers. Alleles size on locus CnCirA3 range 210-280
bp, with highest frequency on 255bp allele (0,203). Rajesh et.al.,(2008) and Ribeiro et al (2010) found 228240bp alleles sizes. The alleles sizes on the CNZ21 locus that range 180-300bp with highest frequency on 240
bp (0,207), on locus CNZ51 range 110-230 bp with the highest frequency 0,221 on 140 and 160 bp. Pandin et al
(2009) found 270bp on loci CNZ21 and 110bp on loci CNZ5 .
Total alleles were found in this research were 80 elleles , with range 9-17 alleles and mean values was 13,3.
This result had more variation than others. Perera et al. (2001) found 56 alleles sizes range 3-10 on 33 samples
coconut in Srilangka used 8 loci. Thirty seven alleles were found on tall and dwarf from nine population from
Agatti and Kavaratti Island, Lakshadweep, India (Devakumar et.al., 2010).
Other research that used 8
microatellites loci from 14 accession from Kidu India coconut population, found 28 alleles with mean two alleles
per locus (Kumar et al., 2011). Overall, genetic diversity in tall coconuts in Bali was very high (Table 1). Mean
values of gene diversity (He) and observed heterozygosity (Ho) were 0.8835 and 0.5421, respectively. The
highest expected heterozygosity was on loci CNZ21 (0.9204), and the lowest gene diversity on CNZ51 (0.8561).
Genetic variation found in this result higher than others research, e.g research coconut population in Brazil,
Phillipina, India, Sri Langka (Perera et al, 2003; Devakumar et al., 2010; Liu, at al.,2011; Xiao, et al., 2013).
Genetic variation on the tall coconut cultivars range value 0.35-0.8166 (Table 2),
high expected
heterozygosity on bulan tall (0.816), and lowest on bluluk tall (0.35). The estimate of heterozygosity was high
(0.590) for Laccadive Micro Tall and Laccadive Small Tall was lowest (0,240) (Devakumar, et.al 2010).
Genetic diversity of 10 coconut accessions from six location in Hainan province, China; expected heterozygosity
of Haikou Green Tall accession was significantly higher (0.4753) than other tall type (Liu et al., 2011)
Higher heterozygosity was determined by number of alleles variation and frequency. Higher diversity in
tall coconuts in Bali, Indonesia was caused by germplasm variation or natural mutation.
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