Genetic diversity of strawberry cultivars in Banyuroto, Magelang, Indonesia based on Cleaved Amplified Polymorphic Sequence

Arif MF, Aristya GR, Kasiamdari RS. 2019. Genetic diversity of strawberry cultivars in Banyuroto, Magelang, Indonesia based on Cleaved Amplified Polymorphic Sequence. Biodiversitas 20: 1721-1728. Banyuroto Village, Magelang, Central Java is the center of strawberry (Fragaria spp.) development and cultivation program. The mild climate makes the location very suitable for developing sub-tropic horticulture such as strawberry. Various kinds of cultivars have been developed as part of the agrotourism program. However, genetic variation research of those cultivars is still rarely done. Therefore, the molecular study of strawberry was conducted to determine the genetic variation using CAPS markers. DNA of Five strawberry cultivars from Banyuroto and seven strawberry cultivars from Indonesian Citrus and Subtropical Fruits Research Institute, Malang were isolated using the CTAB method. DNA amplification was performed by PCR using four pairs of primers named APx, OLP, F3H2, and CTI2. The amplification results were cut with three kinds of restriction endonuclease enzymes named MboI, MluI, and TaqI. Restriction product was used to analyze the genetic variation of twelve cultivars and to construct the dendrogram using MVSP software with the UPGMA algorithm. The result showed that the percentage of polymorphic was 45% from 9 polymorphic bands. Dendrogram result showed that there were four clusters. Cluster A consists of Stroberi Hitam, Cluster B consists of Californica Cultivars, cluster C consists of Osso Grande and Osso Purbalingga cultivars, and cluster D consists of Rosalinda, Deeprose, Dorit, Earlibrite, Tristar, Festival, Brastagi, and Aerut. This research concluded that CAPS markers can be used as a method for study genetic diversity of strawberries.

Cross-resistance Patterns to Acetyl-CoA Carboxylase Inhibitors Associated with Different Mutations in Japanese Foxtail (Alopecurus japonicus)

Japanese foxtail is a grass weed in eastern China. This weed is controlled by fenoxaprop-P-ethyl, one of the most common acetyl-CoA carboxylase (ACCase)-inhibiting herbicides. Some Japanese foxtail populations have developed resistance to fenoxaprop-P-ethyl, owing to target-site mutations (amino acid substitutions) located within the carboxyl transferase domain of ACCase. In the present study, three mutations were detected in three fenoxaprop-P-ethyl–resistant Japanese foxtail populations: Ile-1781-Leu in JCJT-2, Ile-2041-Asn in JZJR-1, and Asp-2078-Gly in JCWJ-3. Two copies ofACCase(Acc1-1andAcc1-2) were identified, but mutations were detected only inAcc1-1. The derived cleaved amplified polymorphic sequence (dCAPS) method detected these mutations successfully in Japanese foxtail. The mutation frequencies in JCJT-2, JZJR-1, and JCWJ-3 were approximately 98%, 92%, and 87%, respectively. Different cross-resistance patterns to ACCase inhibitors were found in the three resistant populations. JCJT-2 (Ile-1781-Leu) and JZJR-1 (Ile-2041-Asn) showed cross-resistance to haloxyfop-R-methyl, clodinafop-propargyl, and pinoxaden, but were susceptible to clethodim. JCWJ-3 (Asp-2078-Gly) showed cross-resistance to all tested ACCase-inhibiting herbicides.