Identifikasi Awal Perbedaan Karakter Morfofisiologi Antar Empat Kultivar Kopi Arabika

Abstract

<em>Arabica coffee is a perennial crop hence it has a long selection cycle. Therefore, efforts to shorten the selection process is necessary, such as at seedling stage. This study aims to identify morpho-physiological characters variability among Arabica coffee cultivars at seedling stage. The experiment was conducted at Pakuwon Experimental Garden of Indonesian Industrial and Beverage Crops Research Institute, Sukabumi, from January to October 2017. Seeds collected from open pollinated trees of four arabica coffee cultivars (Ateng Super, P88, Gayo 1, and Gayo 2) were then sown on seedbed and newly-emerged cotyledonous seedlings were transferred immediately into polyethylene bag (polybag). Seedlings were arranged in randomized complete block with 5 replications, each consisted of 10 seedlings of each cultivar. Morpho-physiological characters observed and analyzed were shoot (plant height, lateral shoot formation, number of internodes, internode length, stem diameter, shoot’s dry weight); leaves (number of leaves, leaf length, leaf width, L/W ratio, leaf area, stomata density , chlorophyll content); and root (root length, number of primary roots, root volume, root’s dry weight, root/shoot ratio). The result showed value of genetic coefficient of variation (GCV), phenotypic coefficient of variation (PCV), and broad sense heritability (h<sup>2</sup><sub>bs</sub>) of plant height characters are classified as high, each of which is 21.66%; 23.66%; and 0.84, respectively. The characters of the stem length and leaf width showed high h<sup>2</sup><sub>bs</sub> value (0.97 and 0.67 respectively), while the KKG and KKF values were classified as moderate (19.60% and 19.88%, respectively and 10.71% and 13.10%, respectively). Those three characters could be utilized as distincitive markers of the four Arabica coffee cultivars.</em>

Phenotypic and genetic performance of Arabica coffee seedling due to effect of genotype and urea

“…Genetic advance (GAM) were low. In contrary to the result of this research, [4][10] [13] found high genotypic coefficient of variance and high coefficient of heritability in plant height of Arabica coffee seedling. [10] found low and moderate genotypic and phenotypic coefficient of variations of plant height, respectively.…”

Metabolite Profiles of the Green Beans of Indonesian Arabica Coffee Varieties

“…Ateng coffee is a catimor type, derived from a natural hybrid between timor and caturra varieties [ 21 ]. Timor variety is a natural cross between C. arabica var.…”

Genetic Diversity of Cultivated Gayo Arabica Coffee (Coffee arabica L.) Revealed via Simple Sequence Repeat (SSR) Marker and Their Morphological Characteristics

“…Over the last 30 years, the application of DNA marker has been widely applied in many diversity studies, evolutionary & phylogenetic studies, genotyping in Marker Assisted Breeding (MAB), due to their bene ts and e ciency, they are: (i) necessary to con rm and support the morphological data(Deschamps et al 2012), as they could sometimes be bias or lead to misinterpretation; such as by the case of the existing diversities of Although, previous results also applied 8 sets(Montagnon et al 2021a) and further employed higher number of marker-sets in order to detect the diversity, namely: 14 sets (Gimase et al 2014), 16 sets(Silvestrini et al 2007), and even up to 30 sets(Montagnon et al 2021a). A narrow genetic base within the commercial Gayo arabica coffee cultivar is in line with(Lashermes et al 1996), (Kathurima C. W 2012),(Silvestrini et al 2007), and(Dani et al 2019). The low molecular polymorphism detected in the Gayo arabica accessions in this study is most probably related to the genesis of this allotetraploid species (2n = 4x = 44).…”

“…Ateng S is highly demanded by the local farmer due to its high productivity with a harvest amount ranging from 0.91 until 1.76 ton per hectares, and other 'notable' yield related characteristics e.g. big bean sizes, early on-set of cherry fruits(Dani et al 2019), but its yield is relatively not stable over the harvesting period, thus it is not further recommended as excellent cultivar for any long term uses…”

“…Dani et al 2019); rather than of residual heterozygosity(Lashermes et al 1996). They previously stated that the current base populations existing should be actually descended from few trees of C. arabica var.…”