Analysis of physiological characters and yield quality of several sweet potato (Ipomoea batatas L.) genotypes at various watering levels in rainfed paddy field

Abstract

Analysis of the physiological characteristics of several sweet potato genotypes at various watering levels in rainfed paddy field indicated that the adaptability of sweet potato genotypes was resistant to drought stress. This research aims to determine the physiological character and yield quality of several sweet potato genotypes (Beta 1 Variety, Perbaungan Accession, and Cengkeh Turi Accession) at various levels of watering (P1 (1 month watering), P2 (2 months watering), and P3 (4 months watering)) in rainfed paddy fields. The research was carried out in the paddy field of Tandem Hilir I Village Deli Serdang and the analysis was carried out in the Tissue Culture Laboratory of the Faculty of Agriculture, the University of Sumatera Utara from March-July 2019. The results of this research indicated that some sweet potato genotypes had no significant effect on the physiological character but had a significant effect on fresh tuber grading. Cengkeh Turi accessions with orange colour tuber had the highest production in the A-class fresh tuber grading category while the Perbaungan accession with orange colour tuber had the lowest production in C-class fresh tuber grading. The watering levels treatment also did not have a significant effect on the physiological character and tuber yield quality.