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Author: search.filters.author.Bunphan, DarikaHas files: No

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    Yield Response of Sweet Potato (Ipomoea batatas L.) Genotypes Cultivated in Post-Rice Paddy Field
    (2025-01-01)
    Ruttanaprasert, Ruttanachira
    ;
    Pinta, Wanwipa
    ;
    Pitak, Lakkana
    ;
    Janket, Anon
    ;
    Bunphan, Darika
    Sweet potatoes (Ipomoea batatas L.) are a nutrient-rich root crop with substantial nutritional, economic, and environmental benefits. This study assessed nine sweet potato genotypes across three distinct locations in Thailand to evaluate yield potential, adaptability, and environmental influences. Trials used a randomized complete block design with four replications. Location 1 (Thatum District) featured sandy soil with moderate pH, high salinity, and balanced nutrients but lower phosphorus (P) and nitrogen (N). Location 2 (Maung District) had sandy, acidic soil but was the most chemically fertile, with high P and potassium (K). Location 3 (Rajamangala University of Technology Isan, Surin Campus) had loamy sand with higher silt content, acidic pH, low P, K, and electrical conductivity (EC). Results highlighted significant yield differences influenced by soil and environmental variability. Genotype SR18003 achieved the highest yield and harvest index, demonstrating strong adaptability and commercial potential. Strong correlations between storage root traits (number, size, and weight) indicate their usefulness for selection. The study underscores the importance of tailored soil management and location-specific genotypes in optimizing sweet potato production, contributing to resilient varieties, sustainable farming, and improved food security. Further research on genetics and agronomy can enhance breeding and cultivation systems.
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    Stability of anthocyanin, carotenoid and root yield of 10 sweet potato genotypes
    (2024-12-01)
    Aninbon, Chorkaew
    ;
    Surach, Noppadol
    ;
    Phungam, Nittaya
    ;
    Janket, Anon
    ;
    Bunphan, Darika
    Sweet potato roots are rich in phytochemicals. The objective of this study was to evaluate the stability of number of storage roots, storage root dry weight, harvest index and anthocyanin and carotenoid contents of 10 sweet potato genotypes. Ten sweet potato genotypes were evaluated in a randomised complete block design with three replications at three locations in Surin province, including Rajamangala University of Technology Isan (RMUTI), Chomphra district and Sanom district during November 2022 to March 2023. Results indicated that the environment significantly influenced most traits, except for carotenoid content. Genotypes and genotype-environment interactions were significant for all traits. Number of storage roots was highest in genotypes found in RMUTI. Storage root yield and anthocyanin content was highest in genotypes found in Chomphra district, while harvest index and carotenoid content were highest in genotypes found in Sanom district. SR 2022/03 had the highest storage root yield across locations and in Chomphra district. KS 2022/07 had the highest harvest index and anthocyanin content across locations. SR 2022/10 had the highest anthocyanin content at RMUTI and also had the highest carotenoid content across locations. KS 2022/07 had the most stable storage root yield. SR 2022/01 had the most stable anthocyanin and carotenoid contents. Information on the levels and variability of phytochemicals in sweet potato enables breeders to select sweet potato genotypes with high and stable phytochemicals for sweet potato breeding.
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    Evaluation of seed sett ages and stem segment position on sugarcane yield and yield related traits
    (2024-01-01)
    Bunphan, Darika
    ;
    Wanna, Ruchuon
    ;
    Pinta, Wanwipa
    ;
    Aninbon, Chorkaew
    ;
    Malambane, Goitseone
    Sugarcane (Saccharum officinarum L.) plays a vital role in tropical and sub-tropical economies due to its high sucrose content, bioenergy potential, and drought resistance. This study aimed to comprehensively investigate the effects of different seed sett (seed material) ages and variations in stem position of the seed setts on both yield and yield related traits of sugarcane cv. Khon Kaen3 (KK3). The experiment was laid out by 3x3 factorial in randomized complete block design (RCBD) with three replications. Factor A represented sugarcane seed sett ages (8, 9 and 10 months old), factor B represented different stem positions where seed setts segments were sectioned out (basal, mid and top part) and-used as planting material (clones). Agronomic management was administered at recommended rates and the growth, development and yield traits were observed. The results showed that seed sett ages influenced the number of tillers at specific growth stages, while different segments affected leaf area (LA) and stalk fresh weight. Seed sett age and position showed significant interactions for some traits. Notably, juice yield was significantly affected by both seed sett ages and segments, with the combination of 10-month-old seed setts and the middle segment yielding the highest juice. Brix value, a crucial trait for sugar production, remained unaffected by these factors. Dry matter accumulation was inconsistent, with seed sett ages impacting stalk dry weight. In conclusion, the results showed that most growth and development traits were not influenced by seed sett ages and stem position segments, but most importantly juice yield at maturity was influenced by seed sett age and position of stem segments. These findings enhance our understanding of sugarcane cultivation practices, offering valuable insights for optimizing planting strategies in the sugarcane industry.
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    Stability of Phenols, Antioxidant Capacity and Grain Yield of Six Rice Genotypes
    (2023-08-01)
    Kunnam, Juthathip
    ;
    Pinta, Wanwipa
    ;
    Ruttanaprasert, Ruttanachira
    ;
    Bunphan, Darika
    ;
    Thabthimtho, Thanasin
    The environment is the main factor affecting variations in phytochemicals and antioxidant activity in rice. The objective of this study was to evaluate the stability of grain yield, phytochemicals and antioxidant capacity of six rice genotypes. Six rice genotypes were evaluated in a randomized complete block design with three replicates at three locations in Trat, Bangkok and Sakon Nakhon provinces in July–October 2019. Data on grain yield, yield components, total phenolic content, ferulic acid and antioxidant capacity were recorded. Grain yield was highest for crops grown in Bangkok, whereas antioxidant activity was highest for crops grown in Bangkok and Sakon Nakhon. Hom Nang Nual 1 and Mali Nil Boran had the highest grain yield. Riceberry had the highest grain yield in Trat; it also had high levels of total phenolic compounds, ferulic acid and antioxidant activity. Mali Nil Boran, Mali Nil Surin and Riceberry had the most stable total phenolic content, ferulic acid and antioxidant activity, respectively. Information on the levels and variability of phytochemicals in rice enables the selection of genotypes with high and stabile phytochemicals for production and rice breeding.