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Selection of Prospective Drought-Tolerant Cocoa Hybrids Based on Additive Main Effect and Multiplicative Interaction Analyses Bayu Setyawan; Agung Wahyu Susilo
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol 33 No 2 (2017)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v33i2.262

Global warming impact in increasing temperature and becomes threat for cocoa production because growth of cocoa depends on the amount of water available in the environment. The objective of this study was to describe cocoa hybrid that may potentially be developed as drought-resistant cocoa hybrid. The study used 14 types of cocoa hybrids and ICCRI 06H as control. Those plants were approximately 4 years old and the hybrids were planted in Sumber Asin Experimental Station and Kendeng Lembu Plantation. The variables being observed to evaluate 2015 El-Nino effect were percentage of growing plants, tree diameter, jorquette height, flush and flower intensity in 2016. Analysis of variance, correlation and additive main effect and multiplicative interaction (AMMI) biplot were used to find out which hybrids were potentially drought-resistant. The finding showed that there was significant interaction between the genotypes (hybrids) and environment towards the percentage of growing plants, tree diameter, flush and flower intensity. The correlation between the variables showed that there was significant, negative correlation between the percentage of growing plants and height; even though there was significant correlation between the two, it was quite low. There was significant correlation between the tree diameter and the jourquette height while there was not any between the tree diameter and the percentage of growing plants. The AMMI analysis classified the drought tolerant hybrids into two groups, (1) cocoa hybrids adaptive to both normal as well as the temperature and water scarcity (drought), was ICCRI 03 x KW 617, and (2) drought tolerance cocoa hybrids, was KW 516 x KW 617.

Stomatal, Proline, and Leaf Water Status Characters of Some Cocoa Clones (Theobroma cacao L.) on Prolonged Dry Season Fakhrusy Zakariyya; Bayu Setyawan; Agung Wahyu Susilo
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol 33 No 2 (2017)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v33i2.264

ENSO (El Nino Southern Oscillation) occurring in 2015 in Indonesia caused drought stress and the decrease in the percentage of production and even death of plants. One effective and relatively inexpensive way of reducing damage and economic losses due to drought is the availibility of tolerant cocoa. The objective of this research was to obtain tolerant clones based on morpho-physiological characters under drought stress. The experiment was conducted in Kaliwining Experimental Station of Indonesian Coffee and Cocoa Research Institute (ICCRI) during dry season (El Nino period with 5 consecutive dry months, from May to October 2015). Stomata, proline, leaf water status was measured at the peak of dry season on tested cocoa clones. The cocoa clones that predicted tolerant against to drought stress were KW 641, KW 514, KW 535, KW 619, and KW 516, whereas the cocoa clones that predicted susceptible under drought stress were KW 609, KW 614, KW 635, KW 606, and KW 651. The treatment clones had higher values of RWC, leaf proline content, narrower width and length of stomata openings, but smaller value of WSD compared to susceptible clones. Meanwhile, the character of leaf thickness might not significanly different to the character of drought tolerance.

Heterosis Analysis of Leaf Stomatal Characteristics on F 1 Population of Cocoa (Theobroma cacao L.) Related to Vascular-Streak Dieback Resistance Agung Wahyu Susilo; Aida Ainurrachmah; Indah Anita-Sari; Bayu Setyawan; Taryono Taryono
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol 33 No 3 (2017)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v33i3.289

Breeding for cocoa resistance to VSD is the main goal in breeding program in Indonesia. Research for selection criteria on cocoa (Theobroma cacaoL.) resistance to vascular-streak dieback (VSD) has being carried out by exploring leaf stomatal characteristics corresponding to VSD damages. This research had objectives to select best crosses by observing the estimated value of heterosis and heterobeltiosis on F1 hybrid populations based on leaf stomata characteristics related to VSD resistance. Trial was established at Kaliwining Experimental Station of Indonesian Coffee and Cocoa Research Institute (ICCRI) in a VSD endemic area. Treatments consisted of 5 F1 hybrid populations generated by biparental crosses of TSH 858(S) x Sulawesi 1 (R), TSH 858 (S) x KEE 2 (R), TSH 858 (S) x Sulawesi 3 (R), Sca 6 (R) x KW 264 (S) and KW 617 (R) x KW 264 (S). Each cross consisted of 100-300 genotypes planted in high planting density of 0.5 m x 0.5 m. Theresistance was evaluated by scoring the plant damage in the scale of 0-3 at three years after planting. Stomata characteristics were assessed microscopically based on the variables of density, length, width and diameter of stomata and width of opening stomata. Analysis of correlation indicated that most of stomatal charac-teristicssignificantly correlated to VSD damage but the width of opening stomata performedthe highest coefficient of correlation (r = 0.49) and contributed to VSD damage (0.45). Meanwhile, path analysis indicated higher value of the char-acteristics performed less resistance of the tested hybrids, KW 617 x KW 264 showed lower value of heterosis and heterobeltiosis for the characteristics which of the best crosses for generating VSD-resistant genotype.

Diversity of Pods and Beans of Twelve Cocoa Clones (Theobroma cacao L.) in Rainy and Dry Seasons Adinda Wuriandani; Agung Wahyu Susilo; Suyadi Mitrowiardjo; Bayu Setyawan; Indah Anita Sari
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol 34 No 1 (2018)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v34i1.302

Cocoa is a sensitive plant to availability of soil water. The availability of water affects the formation of cocoa pods and beans. The aim of this research was to determine the genetic diversity and the influence of season on the diversity of cocoa beans quality as well as determining the pattern of genotype and season interaction on the quality of physical physiology of cacao beans. The research was conducted in Kaliwining Experimental Station, Indonesian Coffee and Cocoa Research Institute, Jember during dry season (2015) and rainy season (2016). This study used a complete randomized block design 2 x 12 factorial and three replicates as blocks. The first factor was the season consisting of two levels namely, dry season and rainy season. The second factor was cocoa clones, TSH 858, KW 084, KEE 2, Sulawesi 1, Sulawesi 2, BAL 209, KW 215, JTC 5A, JTC 5B, KC 2, KKM 22,and KJ 2. Observation variables included pod diameter, pod length, pod weight, dry bean weight, number of good beans/pod, number of empty beans/pod, numberof beans, and number of pods/tree/season. Data was analyzed using ANOVA fixedfactor. The bean dry weight characteristics possesed a low genetic diversity (0.27%) whereas the physical quality character of other beans, i.e bean count had moderategenetic diversity (14.20%). Meanwhile, the real difference was shown on the dry weight of bean characteristics. The best dry bean weight was observed during the dry season. Clones KW 215 and Sulawesi 1 in the dry season was catego-rized in grade A, while the lowest quality JTC 5A with grade D. The interaction of genotype (clone) with the environment (season) resulted in a significant effect onpod diameter character, pod weight, bean count, dry bean weight, and numberof pods/tree. Based on the biplot AMMI graph it was known that the TSH 858 clone showed genetic stability in bean count character. As for the character ofthe number of pods/tree, clones KKM 22, BAL 209, and KW 084 had the stability of the number of pods in rainy and dry seasons. Clones KJ 2 and Sulawesi 2 showed season-specific in the dry season for the number of pods/tree characters.

Rootstock Characteristics of Three Combinations of Theobroma cacao L. Crosses on Different Water Availability Bayu Setyawan; Niken Puspitasari; Agung Wahyu Susilo; Indah Anita Sari
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol 34 No 3 (2018)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v34i3.328

Climate change is universal phenomena which is importantly anticipated including cocoa plantation. Drought tolerance cocoa seedling is urgently neededto develop cocoa plantation. This paper studied possible drought tolerance of cocoa seedling through crossing between female parent KKM 22 with three maleparents BAL 209, KW 641, and KW 614. Progeny test was conducted in green house based on four water availability conditions: 25, 50, 75, and 100%. Root condition was recorded as rootstock parameters of three crossings. Result showed that root characteristics varied among crossing samples studied. The longestand hight volume root were recorded from KKM 22 x BAL 209 crossing. Seedling of KKM 22 x BAL 209 crossing tended to have long and wide root, while seedling of KKM 22 x KW 641 crossing tended to have a wide root type and seedling of KKM 22 x KW 614 tended to have a long root type. Based on drought tolerancy, seedling of KKM 22 x KW 641 crossing could be classified as drought tolerance while other two group progenies could be classified as susceptible to drought.To conclude, seedling of KKM 22 x KW 641 can be recommended for cocoa plantation in drought area.

Germination and Water Content of Cocoa Seeds After Storage Treatments Indah Anita-Sari; Bayu Setyawan; Agung Wahyu Susilo
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol 34 No 3 (2018)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v34i3.329

The challenge of providing cocoa seeds is the characteristic of recalcitrant seed, thus requiring storage techniques that can slow down the decline in seed viability in an effort to manage the distribution of cocoa seeds which depend to the time of demand and harvest. The research aimed to study the effect ofpackaging method for storage of cocoa seeds; the effect of shelf life and temperature to germination and water content of seeds, and the stability of seed germination at different age and storage temperature. The research was conducted at Kaliwining Experimental Station, Indonesian Coffee and Cocoa Research Institute, Jember, East Java. The research used complete randomized design with research design using split plot. The treatments consisted of packaging methods, storage temperature and storage life. Packaging methods consisted of two methods, i.e. vacuum methods and non vacuum methods. Storage temperature consisted of three treatments, i.e. 15OC, 25OC and 30OC. both of packaging and temperature treatments were stored at four shelf life treatment included 1 week, 2 weeks, 3 weeks, and 4 weeks. Each treatment was repeated with three replications and each treatment per replication consisted of 50 seeds. Data analysis used SAS 9.0 and stability analysis used R program and PB Tool. Water content of seeds, germination of seeds and number of seedy seeds were observed. The results showed that type of packaging and storage temperature effect to germination of cocoa seeds but did not effect to seeds water content. Storage of cocoa seeds by non-vacuum packaging showed a higher of germination compared to vacuum packaging in all temperature treatments. Storage with non vacuum packaging at a temperature 25OC showed a germination more than 85% for 2 weeks of shelf life, while storage of cocoa seeds at a temperature of 30OC had a germination of more than 85% for only 1 week shelf life. Storage of cocoa seed at 15OC showed the lowest of germination at treatment. Storage treatments did not show effect on water content of cocoa seeds.

Influence of Geographic Region on Fatty Acid and Physical Properties of Indonesian Cocoa Butter from Smallholder Estate Hendy Firmanto; Supriyanto Supriyanto; Sri Anggraheni; Agung Wahyu Susilo; Bayu Setyawan
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol 35 No 1 (2019)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v35i1.350

Cocoa butter is the most essensial component in chocolate formulation and represent the biggest characteristic of this product. Indonesia is the third cocoa producers with cocoa producing area spread out in different geographic region and may affect in cocoa butter profiles. The aim of this experiment was to evaluate the fatty acid characteristic and physical properties of cocoa butter from smallholder estate relate to geographic region and climate. This experiment was conducted using unfermented cocoa bean from smallholder estate in eight provinces of Indonesian most growing areas. Fatty acid composition evaluated through the different region and physical properties evaluated in melting profiles and solid fat content. The result explain the fatty acid characteristic of Indonesian cocoa butter consist of palmitic acid (C16:0) 26.28–29.20%, stearic acid (C18:0) 32,14–37.29% and oleic acid (C18:1) 32,14–37,29%. Growing temperature signifi- cantly affects the increase of palmitic acid composition contribute to cocoa butter hardness. Cocoa butter completely melt in temperature of 36.65–39.20OC and solid fat content ranged 7.288–16.82% in 33OC and ranged 0.02–0.29% in 38OC. This Indonesian cocoa butter comply to the classification of hard cocoa butter.

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