DAYA GABUNG DAN HETEROSIS KARAKTER VEGETATIF, GENERATIF, DAN DAYA HASIL JARAK PAGAR (Jatropha curcas L.) MENGGUNAKAN ANALISIS DIALEL

ABSTRAK Perakitan varietas unggul memerlukan informasi daya gabung tetua, baik umum maupun khusus. Tetua dengan daya gabung umum (DGU) tinggi berpotensi menghasilkan varietas sintetis atau komposit. Sementara itu, tetua dengan daya gabung khusus (DGK) tinggi berpotensi menghasilkan varietas hibrida. Tujuan penelitian adalah mengetahui daya gabung tetua jarak pagar yang dapat menghasilkan hibrida atau populasi komposit. Sepuluh tetua, yaitu 1 tetua berdaya hasil rendah, 6 menengah, dan 3 tinggi digunakan dalam persilangan dialel lengkap. Evaluasi dilaksanakan di Kebun Percobaan Balittri Pakuwon Sukabumi, mulai Agustus 2008 sampai Juli 2011 menggunakan Rancangan Acak Kelompok tiga ulangan. Karakter yang diamati yaitu tinggi tanaman, lingkar batang, lebar kanopi, umur mulai berbunga, serta jumlah cabang total, cabang produktif, infloresen, tandan, fruit set, dan buah per tanaman. Analisis dialel menggunakan metode I Griffing. Hasil penelitian menunjukkan ratio ragam DGU dan DGK lebih besar daripada satu ( DGU / DGK > 1) pada semua karakter yang dievaluasi. Tetua 3012-1 dan PT 15-1, yang berdaya hasil tinggi, memiliki DGU tinggi pada karakter umur mulai berbunga, lebar kanopi, serta jumlah cabang total, cabang produktif, infloresen, tandan, dan buah. Tetua PT 33-2, yang berdaya hasil menengah, memiliki DGU tinggi pada karakter umur mulai berbunga, serta jumlah cabang total, cabang produktif, infloresen, dan buah. Sementara itu, tetua 575-3, yang berdaya hasil rendah, memiliki DGU tinggi pada lingkar batang. Tetua PT 33-2, 3012-1, dan PT 15-1 berpotensi sebagai penyusun populasi dasar untuk pembentukan varietas sintetik yang cepat berbunga dan berdaya hasil tinggi. Tetua 575-3 berpotensi untuk dirakit sebagai varietas yang memiliki lingkar batang besar dan berbunga lambat. Kata kunci: daya gabung umum, daya gabung khusus, gen aditif, komposit, Jatropha curcas L.ABSTRACT General Combining Ability (GCA) and Specific Combining Ability (SCA) are important in creating high yielding varieties. A parent having high GCA is appropriate to produce synthetic or composite varieties, while high SCA is to produce hybrid. The research objective is to find out the information of parents combining ability in Jatropha curcas L. Research was conducted using diallel analysis. Ten genotypes i.e. 1 low yielding parent, 6 medium, and 3 high were used to generate F1 arrays with full diallel analysis. Evaluation was conducted at Indonesian Spice and Industrial Crops Research Institute Experimental Station, using Randomized Block Design from August until July 2011. The observation were plant height, stem girth, canopy width, days to flowering, and number of total branches, productive branches, inflorescences, bunches, fruit set percentages; and fruit per plant. Diallel analysis was using Griffing Model I. Results showed that general variance, each of GCA and SCA ratio, is more than one ( GCA / SCA > 1) in all evaluated characters. High yielding parents of 3012-1 and PT 15-1 exhibited high GCA on days to flowering, canopy width, and number of total branches, productive branches, inflorescences, bunches, and fruits. Medium yielding parents of PT 33-2 exhibited high GCA for days to flowering, number of total branches, productive branches, inflorescences, and fruits. Low yielding genotype of 575-3 exhibited high on stem girth. PT 33-2, 3012-1, and PT 15-1 could be used for developing early flowering and high yielding varieties, while 575-3 was suitable for producing big stem girth and late flowering varieties. Key word: general combining ability, specific combining ability, additive gen, composite, Jatropha curcas L.

Download Full-text

Combining ability of superior cacao clones for assembling high productivity and disease resistant cocoa

E3S Web of Conferences ◽

10.1051/e3sconf/202130601052 ◽

2021 ◽

Vol 306 ◽

pp. 01052

Author(s):

Rubiyo ◽

Nicho Nurdebyandaru

Keyword(s):

Combining Ability ◽

Block Design ◽

General Combining Ability ◽

Specific Combining Ability ◽

Resistance Test ◽

High Productivity ◽

Disease Resistant ◽

Strain Combination ◽

Randomized Block Design ◽

Rot Disease

This research aimed to determine the potentiality of P1 and P2 as parents to produce superior strains of hybrid cacao by estimating general combining ability (GCA) and specific combining ability from crossed diallel among high yielding parents which are resistant to P. palmivora. The study was conducted at the Experimental Farm Sumber Asin, Malang, East Java, from 2010 to 2018. The research was arranged in Randomized Block Design (RBD) consisted of 10 hybrids and 5 parents so that the treatment used 15 genotypes. Each treatment consisted of 12 plants in triplicates. Resistance test on parents and F1 showed that all crossed combination strains were infected by pod rot disease (P. palmivora) with various intensity. The highest disease intensity was a strain combination of DR 1 x ICS 13 and the lowest one was ICS 13 and SCa 6. All crossed combination strains in the field had not shown symptoms of any pest infection. Cacao clones that have low GCA value based on the disease intensity were TSH 858, ICCRI 3 and SCa 6. These clones have the potential to be used in the assembly of disease-resistant and high-yielding cocoa hybrids in the future.

Download Full-text

Implementation of partial diallel analysis to determine general combining ability and agronomic character genetic parameters of shade-tolerant maize lines

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/911/1/012019 ◽

2021 ◽

Vol 911 (1) ◽

pp. 012019

Author(s):

Roy Efendi ◽

Muhammad Azrai

Keyword(s):

Combining Ability ◽

Genetic Parameters ◽

Block Design ◽

Diallel Analysis ◽

General Combining Ability ◽

Leaf Length ◽

General Ability ◽

Randomized Block Design ◽

High Heritability ◽

Ear Height

Abstract Information about combining ability and genetic parameters guide maize breeders in selecting parents and gene action of the desired trait. This study aims to determine the general combining ability of the yield characters of shading tolerant maize lines and the genetic parameters of their agronomic characters. This research was conducted at IP2TP Bajeng in December 2020-March 2021. The study was arranged in a randomized block design with three replications. The genotypes used were nine hybrids obtain from a partial diallelic (2x6). The results showed that line SHD3 showed good general ability for yield. High heritability values were shown by variables days to anthesis, days to silk, plant height, ear height, leaf length, leaf width, 100 grains weight and ear diameter.

Download Full-text

Combining ability and Heterosis analysis for grain yield and yield associated traits in Pea (Pisum sativum L.)

Legume Research - An International Journal ◽

10.18805/lr-3955 ◽

2018 ◽

Author(s):

Nageshwar . ◽

Bijendra Kumar ◽

Hariom Suman ◽

A. H. Madakemohekar ◽

Dattesh Tamatam

Keyword(s):

Pisum Sativum ◽

Grain Yield ◽

Combining Ability ◽

Block Design ◽

General Combining Ability ◽

Specific Combining Ability ◽

Combining Abilities ◽

Pisum Sativum L ◽

Randomized Block Design

This experiment was conducted to determine the general and specific combining abilities and heterosis for grain yield and yield associated traits in pea as a source of protein through line x tester analysis. Grain yield and its inheritance were carried out for investigation through a 12 x 3 line x tester analysis. Experimental materials comprising 15 parents and their 36 hybrids. The materials were planted in a randomized block design with three replications. The general combining ability and Specific combining ability effects were significant indicating the presence of both additive and non-additive types of gene actions. Heterosis was determined as the superiority over mid parent heterosis as well as better parent (HBP). Grain yield showed highly significant heterosis ranging from -36.29 to 8.77and relative heterosis ranged from -25.85 to 13.19 respectively.

Download Full-text

ОЦІНКА КОМБІНАЦІЙНОЇ ЗДАТНОСТІ СОРТІВ ЯЧМЕНЮЯРОГО ЗА КІЛЬКІСНИМИ ОЗНАКАМИ В УМОВАХ ПІВНІЧНОГО СТЕПУ УКРАЇНИ

Вісник Полтавської державної аграрної академії ◽

10.31210/visnyk2014.02.02 ◽

2014 ◽

pp. 23-25

Author(s):

В. В. Ващенко ◽

О. О. Шевченко

Keyword(s):

Plant Height ◽

Combining Ability ◽

Diallel Analysis ◽

General Combining Ability ◽

Specific Combining Ability ◽

Grain Weight ◽

1000 Grain Weight

У системі діалельних схрещувань п’яти сортів яч-меню ярого (Донецький 12, Донецький 14, Донецький 15,Прерія, Галактик) установлено особливості генети-чного контролю мінливості ознак: висота рослин,кількість зерен у колосі, маса 1000 зерен у відповід-ності зі співвідношенням варіанс специфічної комбі-наційної здатності (СКЗ) і загальної комбінаційноїздатності (ЗКЗ). Виділено й запропоновано сорти якджерела ознак висота рослин Галактик і Донецький14; кількість зерен у колосі – сорт Прерія; маса 1000зерен – сорт Донецький 15. Виділені зразки з високимі стабільним рівнем комбінаційної здатності запро-поновано використовувати в селекційній роботі. A total of diallel analysis varieties of springbarley Donetskiy 12, Donetskiy 14, Donetskiy 15,Prairie, Galactic set features genetic controlvariability characteristics: plant height, number ofgrains per ear, 1000 grain weight in accordance withthe ratio of variance of specific combining ability(SSI) and general combining ability (ZKZ).Identified and proposed as a source of variety traitsplant height and Donetsk 14, Galactic, the numberof grains per ear sort Prairie, weight of 1000 grainsDonetskiy 15. Samples of high and stable levels ofcombining ability is proposed to use in breedingwork have beeen celected.

Download Full-text

Heterosis, Combining Ability, Genetic Diversity and their Interrelationship in Pigeonpea [Cajanus cajan (L.) Millspaugh]

Legume Research - An International Journal ◽

10.18805/lr-4628 ◽

2021 ◽

Author(s):

D. Chandra ◽

S.K. Verma ◽

A.K. Gaur ◽

C. Bisht ◽

A. Gautam ◽

...

Keyword(s):

Genetic Diversity ◽

Combining Ability ◽

High Frequency ◽

Block Design ◽

General Combining Ability ◽

F1 Hybrids ◽

Randomized Block Design ◽

Degree Of Dominance ◽

Correlation Result ◽

Per Se

Background: The development of superior hybrids is must to break the existing yield plateau ( less than 800 kg/ha) in pigeonpea and hence, the genetic mechanism governing the heterosis in pigeonpea must be decoded. Methods: The present study was laid down using randomized block design during kharif 2018-19 at GBPUAT, Pantnagar with 36 genotypes (8 parents and 28 F1 hybrids) of pigeonpea. The estimates of combining ability were evaluated by using the Griffing’s, Method II, Model I. The observations recorded for yield and related traits were subjected to the estimation of genetic diversity (GD) using the D2 statistics. The correlation between heterosis and different parameters viz., parental mean (PM), specific combining ability (SCA), mean of general combining ability (MGCA) and genetic diversity (GD) were estimated by using Pearson’s correlation. Result: High estimates of SCA variance and more than unity ( greater than 1) average degree of dominance for all the characters indicated the presence of over dominance. The SCA followed by MGCA were found to be most reliable parameters to predict the heterosis. The parents having high x low or high x high per se performance, good x poor GCA effects and with medium genetic diversity resulted in high frequency of heterotic hybrids.

Download Full-text

Combining ability studies for yield, associated traits and quality attributes in rice for South Gujarat (Oryza sativa L.)

Journal of Applied and Natural Science ◽

10.31018/jans.v9i1.1151 ◽

2017 ◽

Vol 9 (1) ◽

pp. 60-67

Author(s):

Navin Chander Gahtyari ◽

P. I. Patel ◽

Rakesh Choudhary ◽

Sudhir Kumar ◽

Naveen Kumar ◽

...

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Plant Height ◽

Combining Ability ◽

Amylose Content ◽

Oryza Sativa L ◽

Block Design ◽

General Combining Ability ◽

Specific Combining Ability ◽

Kernel Length

Line x tester analysis using a set of four females, ten males and their forty hybrids was carried out to esti-mate the general combining ability of parents and specific combining ability of hybrids for yield and ten other associ-ated components in rice (Oryza sativa L.) in a Randomized Block Design during Kharif 2011. GCA variances for females (s2f) were significant at 0.1% level of significance for plant height (40.8), no. of grains per panicle (505.9), grain yield per plant (29.1), test weight(17.9), straw yield per plant (61.3) and kernel L/B ratio (0.2) whereas specific combining ability (SCA) variances for f x m interactions were highly significant for all the characters. Non-additive gene action was prevalent in all characters (Range: 0.03 in amylose content to 0.88 in kernel length breadth ratio) except plant height (1.33) as evident by low GCA to SCA ratio. None of the parents were good general combiner for all traits, however, female IR-28 and male AMT-119 and PNR-546 were good general combiners for a maximum number of traits i.e. five traits out of eleven.. The general combining ability for grain yield per plant for female parent Gurjari (6.19) and NVSR-178 (5.29); and male parents AMT 119 (2.73) and PNR 546 (2.44) makes them a good choice for improving yields in a hybridization programme as these female and male parents are also having signifi-cant GCA effects for maximum number of yield associated traits i.e. four and five traits out of eleven for female and male parents respectively. A vis-à-vis comparison of top three specific combining ability crosses with their mean performance showed correlation and these crosses were having at least one good general combining ability parent.

Download Full-text

EVALUATION OF THE ASSUMPTIONS REQUIRED FOR THE GENETIC INTERPRETATION OF DIALLEL EXPERIMENTS IN SELF-POLLINATING CROPS

Canadian Journal of Plant Science ◽

10.4141/cjps77-174 ◽

1977 ◽

Vol 57 (4) ◽

pp. 1185-1191 ◽

Cited By ~ 15

Author(s):

M. J. SOKOL ◽

R. J. BAKER

Keyword(s):

Combining Ability ◽

Gene Frequency ◽

Gene Action ◽

Diallel Analysis ◽

General Combining Ability ◽

Specific Combining Ability ◽

Genetic Models ◽

Gene Frequencies ◽

Dominance Interaction ◽

Genetic Interpretation

Simulation of two-locus genetic models was used to investigate the effects of gene frequency, non-random association of genes, and epistasis on the interpretation of diallel experiments in self-pollinating crops. It was demonstrated that general combining ability includes effects due to additive, epistatic, and, when gene frequencies are not equal to 0.5, dominance gene action. Similarly, when gene frequencies do not equal 0.5, average heterosis depends upon additive × dominance interaction as well as dominance and dominance × dominance interaction. Negative associations between genes greatly inflate the apparent amount of specific combining ability. These findings cast serious doubt on the utility of diallel analysis for studying the genetics of self-pollinating crops.

Download Full-text

KERAGAMAN GENETIK, HERITABILITAS, DAN KORELASI ANTAR KARAKTER 10 GENOTIPE TERPILIH JARAK PAGAR (JATROPHA CURCAS L.)

Jurnal Penelitian Tanaman Industri ◽

10.21082/jlittri.v18n2.2012.74-80 ◽

2020 ◽

Vol 18 (2) ◽

pp. 74

Author(s):

R r. SRI HARTATI ◽

ASEP SETIAWAN ◽

BAMBANG HELIYANTO ◽

SUDARSONO SUDARSONO

Keyword(s):

Genetic Variability ◽

Jatropha Curcas ◽

Fruit Set ◽

Phenotypic Variability ◽

Block Design ◽

Selection Criterion ◽

Yield Component ◽

Experimental Unit ◽

Physic Nut ◽

Jatropha Curcas L

ABSTRAK Untuk menyusun program pemuliaan jarak pagar berdaya hasil tinggi, diperlukan populasi dasar yang memiliki keragaman genetik yang tinggi terutama pada karakter yang berkaitan dengan daya hasil tanaman. Penelitian ini bertujuan untuk mengevaluasi keragaman genetik, heritabilitas, dan korelasi antar karakter genotipe terpilih. Sepuluh genotipe dievaluasi di Kebun Percobaan Balai Penelitian Tanaman Rempah dan Aneka Tanaman Industri Pakuwon, Sukabumi mulai bulan Agustus 2009 - Juli 2010. Rancangan lingkungan adalah acak kelompok lengkap dengan 3 ulangan. Setiap unit percobaan terdiri atas 5 tanaman yang ditanam dalam 1 baris dengan jarak antar baris 2 m dan jarak dalam baris 1 m. Evaluasi dilakukan terhadap karakter vegetatif (meliputi tinggi tanaman, lingkar batang, lebar kanopi, dan jumlah cabang total), karakter generatif (meliputi jumlah cabang produktif, umur mulai berbunga, jumlah tandan bunga, jumah tandan buah, fruit set), serta komponen hasil yaitu jumlah buah per tanaman. Hasil penelitian menunjukkan 10 genotipe yang dievaluasi memiliki keragaman genetik yang luas pada karakter generatif umur mulai berbunga, jumlah tandan bunga, jumlah tandan buah, dan jumlah buah per tanaman dengan nilai koefisien keragaman genetik (KKG) berturut-turut 21,89; 29,77; 32,08; dan 33,75. Karakter-karakter ini memiliki ragam genetik luas dan heritabilitas dalam arti luas yang tinggi sehingga dapat dimanfaatkan sebagai kriteria seleksi. Karakter vegetatif jumlah cabang total memiliki keragaman genetik agak luas, heritabilitas tinggi, dan berkorelasi positif dengan jumlah tandan bunga, jumlah tandan buah, dan jumlah buah per tanaman sehingga dapat dipertimbangkan sebagai kriteria seleksi. Kata kunci : Jatropha curcas, keragaman fenotipik, koefisien keragaman, ragam genetik, kriteria seleksiABSTRACT Genetic variability, heritability, and correlation among characters of 10 selected genotypes of physic nut (Jatropha curcas L.) To arrange breeding programme of jatropha high yielding varieties, it is required population base having high genetic variabilities, especially in yield components. The objectives of this research were to evaluate genetic variability, heritability estimate, and analyze correlation among characters of 10 physic nut genotypes. Ten Jatropha curcas genotypes were evaluated at Pakuwon Experimental Station of Indonesian Spice and Industrial Crops Research Institute, Sukabumi, from August 2009 - July 2010. A randomized complete block design with 3 replicates was applied in this experiment. Each experimental unit consisted of five plants grown in a row with 2 m spacing in line and 1 m in row. The observations were made for vegetative characters (plant height, stem girth, canopy width, and number of total branches per plant), generative characters (days to flowering, number of productive branches, inflorescences, fruit bunches per plant, and fruit set percentages), and yield component : number of fruit per plant. Results of the experiments indicated that the evaluated genotypes had wide genetic variability on several generative characters i.e. days to flowering, number of inflorescences, number of fruit bunches, and number of fruits per plant with genotypic variability coefficient (GVC) values of 21.89; 29.77; 32.08; and 33.75, respectively. Their genetic variabilities were broad and high heritability. The total number of branches as a vegetative character was fairly wide in genetic diversity, high heritability, and positively correlated with number of inflorescences, bunches, and fruits per plant. These characters can be considered as selection criteria. Key words : Jatropha curcas L., phenotypic variability, coefficient of variation, genetic variability, selection criterion

Download Full-text

Studies on Combining Ability in Eggplant (Solanum melongena L.) for Yield and Its Component

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i1330678 ◽

2020 ◽

pp. 38-46

Author(s):

. Pramila ◽

M. L. Kushwaha ◽

Udit Kumar ◽

Ramesh Kumar Gupta ◽

Bishwa Mitra Sinha

Keyword(s):

Combining Ability ◽

Block Design ◽

Total Yield ◽

Winter Season ◽

Solanum Melongena ◽

General Combining Ability ◽

Research Centre ◽

Plant Weight ◽

Randomized Block Design ◽

Fruit Diameter

Present investigation was carried out during autumn winter season 2013-14 and 2014-15 at the Vegetable Research Centre of GBPUA&T, Pantnagar with 43 genotypes including 10 lines, 3 testers and 30 F1’s of brinjal. The experiment was laid out in Randomized Block Design with three replications. The observations were recorded for 11 characters. Variances due to testers were greater than variances due to lines for most of the characters. The estimates of General Combining Ability (GCA) effect indicated that PB71, BB85, PB66, Swarn Syamli and DBL02 were best general combiner for earliness (days to 50% flowering), whereas the best specific cross was BRLVAR6 × DBL02. For weight of marketable fruits per plant PB66, SMB115, LC7, BRLVAR6 were best general combiners and SMB115 × DBL02, PB66 × Pant Samrat and IBWL 2001-1 × Pant Rituraj were best specific combiners. Pant Rituraj was found best general combining effect for plant height, fruit diameter, weight of marketable fruits per plant, number of unmarketable fruits per plant, total yield per plant and total yield per hectare. Pant Samrat showed good General Combining Ability (GCA) effects for number of primary branches per plant, number of marketable fruits per plant, weight of unmarketable fruits per plant and total number of fruits per plant. DBL02 was recorded best general combiner for earliness and fruit length. SMB115 and PB 66 were best general combiners for most of the yield characters. SMB115 × DBL02, PB66 × Pant Samrat and IBWL2001-1 × Pant Rituraj were showed highest Specific Combining Ability (SCA) effect for most of the characters. Therefore, these cross combinations could be commercially exploited for higher yield.

Download Full-text

PENGARUH MINYAK JARAK PAGAR (Jatropha curcas LINN.) TERHADAP MORTALITAS, BERAT PUPA, DAN PENELURAN HAMA JARAK KEPYAR

Jurnal Penelitian Tanaman Industri ◽

10.21082/jlittri.v16n4.2010.159-164 ◽

2020 ◽

Vol 16 (4) ◽

pp. 159

Author(s):

TUKIMIN S W ◽

DECIYANTO SOETOPO ◽

ELNA KARMAWATI

Keyword(s):

Crude Oil ◽

Key Words ◽

Phorbol Ester ◽

Jatropha Curcas ◽

Castor Oil ◽

Block Design ◽

Physic Nut ◽

Jatropha Curcas L ◽

Randomized Block Design ◽

Achaea Janata

ABSTRAKPenelitian pengaruh minyak jarak pagar (Jatropha curcas L.)terhadap mortalitas, berat pupa dan peneluran larva Achaea janata belumpernah dilakukan di Indonesia. Berdasarkan analisis yang dilakukansebelumnya minyak jarak pagar mengandung phorbol ester yang dapatdigunakan sebagai biopestisida dan Achaea janata merupakan hama utamapada tanaman jarak kepyar. Penelitian ini telah dilaksanakan diLaboratorium Entomologi, Balai Penelitian Tanaman Tembakau dan SeratMalang pada bulan April - Juli 2009, menggunakan rancangan acakkelompok dengan 4 perlakuan konsentrasi minyak jarak pagar, satupembanding, satu kontrol air dan kontrol detergen, diulang tiga kali.Tujuan penelitian adalah untuk mengetahui efek phorbol ester dalamminyak biji jarak pagar (MJP) untuk membunuh larva A. janata. Duaaksesi minyak biji jarak pagar yang diuji adalah: SP 67 asal SulawesiSelatan dan Jatim 45 asal Jawa Timur. Pengamatan meliputi jumlahmortalitas larva, berat prepupa, pupa, jumlah telur, dan telur tetas. Hasilpenelitian menunjukkan bahwa aksesi SP 67 yang memiliki kandunganphorbol ester 9,49 µg/ml dengan konsentrasi 5 ml minyak biji jarak pagar(J. curcas) + 1 g detergen/liter air cukup efektif dan mengakibatkanmortalitas larva A. janata 85,34%, LC 50 =2,33 ml/L, 72 jam setelahpenyemprotan. Jumlah telur 362 butir dan telur tetas 34,27%. Aksesi Jatim45 yang memiliki kandungan phorbol ester 4,39 µg/ml dengan konsentrasi10 ml minyak biji jarak pagar (J. curcas) + 1 g detergen/liter air cukupefektif dan mengakibatkan mortalitas larva A. janata 85,34%, LC 50 = 9,35ml/liter pada 72 jam setelah penyemprotan. Jumlah telur 487 butir dantelur tetas 34,75%. Kedua aksesi tersebut mengakibatkan mortalitas larvaA. janata dan efek lanjutan mengakibatkan cacat larva, prepupa, dan pupa,penurunan jumlah telur dan presentase telur tetas.Kata kunci: Jatropha curcas L, phorbol ester, aksesi, minyak biji jarakpagar, mortalitas, larva, Achaea janata L.ABSTRACTEffects of Jatropha curcas Crude Oil (JCO) on Mortality,Weight of Pupae, and Fertility of Achaea janataStudy on the effects of JCO on mortality, weight of pupae, andfertility of Achaea janata has never been done in Indonesia. Based onanalysis, JCO contains phorbol ester which can be used as biopesticide.A. janata is a main pest on castor oil plants. This study was carried out atEntomology Laboratory of Indonesian Tobacco and Fiber Crops ResearchInstitute (ITOFCRI) in Malang from April through July 2009. Theexperiment was arranged using randomized block design with 7 treatmentsand 3 replicates. The objective of the research was to find out the ability ofJCO to kill larvae of A. janata and its effect on pupae weight and fertility.This experiment tested two physic nut accessions : SP 67 (originated fromSouth Sulawesi) and Jatim 45 (from East Java). Observations included thenumber of larvae mortality, weights of prepupae and pupae, number ofeggs, and percentage of hatches. Results showed that SP 67 accessioncontaining 9.49 µg phorbol ester/ml oil with concentration of 5 ml JCO +1 g detergent/l was fairly effective to kill larvae of A. janata (LC 50 = 2.33ml/l) after 72 hours of spraying. Pupae laid 362 eggs and only 34.27% ofthe eggs hatched. Jatim 45 accession containing 4.3 g/µg phorbol ester perml oil with concentration of 10 ml JCO + 1 g detergen/l was fairlyeffective to kill larvae of A. janata (LC 50 = 9.35 ml/l) after 72 hours ofspraying. Only 34.75 % of the 487 eggs hatched.Key words: Jatropha curcas L., phorbol ester, accessions, JCO,mortalily, larvae, Achaea janata L.

Download Full-text