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ARS Home » Southeast Area » Tifton, Georgia » Crop Genetics and Breeding Research » Research » Publications at this Location » Publication #365299
Research Project: Development of High-Yielding, High-Oleic Peanut Cultivars or Germplasm with Tolerance to Biotic and Abiotic Stresses

Location: Crop Genetics and Breeding Research

Title: Determination of lethal dose and effect of gamma rays on growth and tuber yield of Jerusalem artichoke mutant

Author
item SONGSRI, P - Khon Kaen University
item JOGLOY, S - Khon Kaen University
item Holbrook, Carl - Corley
item PUANGBUT, D - Khon Kaen University

Submitted to: SABRAO J. of Breeding and Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/1/2019
Publication Date: 3/1/2019
Citation: Songsri, P., Jogloy, S., Holbrook Jr, C.C., Puangbut, D. 2019. Determination of lethal dose and effect of gamma rays on growth and tuber yield of Jerusalem artichoke mutant. SABRAO J. of Breeding and Genetics. 51:1-11.

Interpretive Summary: Jerusalem artichoke is a tuberous crop that can be grown successfully in the semi-arid tropics including Thailand. Genetic diversity is essential for developing improved varieties, and is limited in Jerusalem artichoke. Induced mutations by gamma ray irradiation has been used to increase genetic variation of economically important traits in other tuber crops such as potato, yam, and sweet potato. The objectives of this study were to determine the lethal dose of gamma ray irradiation on Jerusalem artichoke and measure the effects of gamma rays on growth and tuber yield. The dose where 50% of the plants were killed was determined for two varieties of Jerusalem artichoke. Plant height and germination percentage decreased with increasing doses of gamma rays. However, lower doses could be used to increase tuber yield of these two varieties.

Technical Abstract: Mutation induced by radiation may result in increased variation in Jerusalem artichoke. The objective of this study was to determine the LD 50 and effect of gamma rays on growth and tuber yield of two Jerusalem artichoke genotypes HEL 65 and CN 52867. The experimental design was a completely randomized design (CRD) with 4 replications. The results demonstrated that LD50 for the genotypes HEL 65 and CN 52867 were 22 and 27 Grays (Gy), respectively. The radiation treatments did not change flower characters in either genotype. Germination percentage and plant height in both genotypes were decreased by increasing the radiation dose. In contrast, the number of branches was increased with higher gamma radiation doses (20 and 25 GY). Gamma ray radiation at 5 Gy increased tuber yield in both Jerusalem artichoke genotypes. The present study indicated that gamma radiation might be useful for improvement of important traits such as yield in Jerusalem artichoke.