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Maharijaya, dan Awang

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Author-ID : 1119918

Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Seleksi dan Kemajuan Seleksi Karakter Komponen Hasil pada Persilangan Cabai Keriting dan Cabai Besar ,, Yunandra; Syukur, Muhamad; Maharijaya, dan Awang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 45 No. 2 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Selection is very important activity in plant breeding program. The purpose of this study was to obtain genetic information, heritability and expected genetic advance, and to compare the genetic advance expectations with the selection advance. The research was conducted from September 2013 to November 2015 at Research Station of Leuwikopo, Dramaga, Bogor. Distribution of F2 population data in this study was broader than that of F3 populations. Broad sense heritability estimated by F3 populations showed in agreement to that estimated by F2 population. Character of fruit weight, fruit length, pedicel length and yield had positive value of selection advance appropriate to the genetic advance expectations in F2 populations. The value of heritability estimate and genetic advance were high indicating that the phenotypic variances were controlled by action of additive genes.Keywords: genetic advance, heritability, selection advance

Karakteristik Buah Melon (Cucumis melo L.) pada Lima Stadia Kematangan Huda, Amalia Nurul; Suwarno, Willy Bayuardi; Maharijaya, dan Awang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 46 No. 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Melon breeding for fruit quality improvement is important to produce new varieties that meet consumers’ demand. The aim of this study was to elucidate the fruit characteristics of melon at five different maturity stages, involving several genotypes belonging to two cultivar groups: reticulatus and inodorus. The experiments were conducted in three planting seasons: (1) January-March 2015 (13 genotypes), (2) December 2015-February 2016 (56 genotypes), (3) February-May 2016 (9 genotypes). These trials were conducted at the Tajur II experimental station of IPB, Bogor, and each trial was arranged in a single factor randomized complete block design with three blocks. Maturity stages was determined based on fruit rind color and net coverage, and their effects on fruit quality were studied using combined analyses over seasons. Maturity stage significantly affected the fruit length, fruit diameter, flesh thickness, fruit weight, and sugar content. The average weight of the fruits at maturity stage 4 (838.90 g) and 5 (931.79 g) was significantly greater than that of stage 1 (584.42 g). The sugar content increased from maturity stage 2 (5.51 oBrix) to 3 (6.13 oBrix) and to 5 (8.18 oBrix). Fruit weight significantly correlated with fruit length (r = 0.53), fruit diameter (r = 0.85), fruit rind thickness (r = 0.33), and flesh thickness (r = 0.63). Maturity stages affected the quality of melon fruits, and therefore the determination of appropriate harvesting criteria is important in melon cultivations.Keywords: cantalupensis, correlation, inodorus, fruit quality, skin colour

Pengembangan Kriteria Seleksi untuk Perakitan Terung (Solanum melongena L.) Berdaya Hasil Tinggi Putri, Faradila Danasworo; ,, Sobir; Syukur, Muhamad; Maharijaya, dan Awang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 45 No. 2 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Eggplants (Solanum melongena L.) are consumed worldwide in a variety of colors, shapes and sizes, thus vegetable plant breeders place great interest in developing high yielding genotypes in response to the population growth and the need to increase vegetable production. This research was aimed to determine the proper character as selection character for breeding high yielding eggplants by using estimated heritability value, coefficient of genetic diversity, characters correlation and path analysis. The experiment was conducted during 2014 to August 2015 at Cikabayan Experimental Field, Tajur Experimental Field and Pasir Sarongge Experimental Field, IPB, West Java. A total of 12 characters was observed in the 25 genotypes. Eleven characters has a high estimated heritability value and high coefficient of genetic diversity value. Those characters were time of flowering, time of harvest, fruit length, fruit weight, fruit diameter, plant height, stem length, fruit apical scar length, calyx length, the number of fruits per plant and fruit weight per plant. Results of correlation and path analysis showed that fruit length, fruit weight, fruit diameter, stem diameter, calyx length and number of fruits per plant have a direct positive effect on fruit weight per plant. Fruit weight, fruit diameter and number of fruits per plant are suitable characters in determining the selection criteria for developing high productivity eggplant.Keywords: path analysis, correlation, heritability, genetic diversity coefficient

Regenerasi Tanaman dari Kalus Tebu yang Diiradiasi Sinar Gamma pada Medium dengan PEG 6000 Purwito, Agus; Ravenska, Nidya; Maharijaya, dan Awang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 44 No. 3 (2016): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTSugarcane cultivars tolerant to drought stress are needed for specific location. In vitro selection can be used to obtain plants tolerant to drought stress through regeneration of callus in the culture medium. The purpose of this study was to obtain regenerants from irradiated callus on the stress medium. The experimental design was a completely randomized design with two factors. The first factor was the regeneration medium (RG) added with PEG 6000, i.e., 0%, 5%, 10% and 15%, while the second factor was the dose of gamma ray irradiation i.e. 0 krad, 5 and 10 krad, and 15 krad. There were 12 treatments, each treatment was repeated 18 times and each repetition was a culture bottles planted with three clums of callus 10 mm diameter. RG medium was the MS medium added with 0.5 mg L-1 BAP, Kinetin 0.1 mg L-1 and IBA 1.0 mg L-1. The higher the concentration of PEG, the less regenerants were produced. Regenerants could be generated from the selection medium PEG up to 15%. Several shoots still produced from callus irradiated with 10 krad. Selection medium with PEG up to 10% decreased the precentage of albino regenerants. The gamma ray irradiation dose and the concentration of PEG significanly affected the number of roots produced.Keywords: drought tolerant, in vitro, polyethylene glycol, plantlets, albino

Co-Authors ,, Yunandra Agus Purwito Amalia Nurul Huda Muhamad Syukur Putri, Faradila Danasworo Ravenska, Nidya Sobir Sobir Willy Bayuardi Suwarno

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