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Manipulation of microtubers for direct field utilization in seed production

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Abstract

A two-year field study was conducted to determine the effects of jasmonic acid (JA), light (duringin vitro explant production andin vitro tuberization phases), and dormancy-breaking treatment on performance of microtubers in the production of seed tubers (pre-elite) in five potato cultivars. Microtubers were produced under short day (8-h) conditions and in darkness, from stock plantlets pre-treated with JA and untreated, and on tuberization media with or without JA. Microtuber performance was compared to invitro plantlets transplanted directly to the field. Yields of tubers from microtubers were 30% to 40% of those from plantlets.

Microtubers of cultivars Amisk and Russet Burbank produced the highest yields of pre-elite tubers. Atlantic microtubers performed poorly in the field. JA pre-treatment of stock plantlets, prior toin vitro tuberization, enhanced seeds tuber production from microtubers in Russet Burbank and lowered in Shepody. JA presence in media duringin vitro tuberization significantly lowered production of tubers while exposure to 8-h light resulted in microtubers performing significantly better in the field than microtubers produced in the dark. Dormancy release was the key factor influencing microtuber performance. Unlike greenhouse studies, gibberellic acid (GA3) was more effective than Rindite. A further refinement of the production and handling methods is required before microtubers can be recommended for field production of seed tubers.

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Authors and Affiliations

  1. Crop Diversification Centre North, 17507-Fort Road, T5B 4K3, Edmonton, AB, Canada

    K. Pruski, P. Duplessis & L. Stewart

  2. Department of Plant and Animal Sciences, Nova Scotia Agricultural College (NSAC), 50 Pictou Rd., P.O. Box 550, B2N 5E3, Truro, NS, Canada

    K. Pruski & J. Nowak

  3. Department of Engineering, NSAC, P.O. Box 550, B2N 5E3, Truro, NS, Canada

    T. Astatkie

  4. Department of Horticulture, Virginia Polytechnic Institute and State University, 24061, Blacksburg, VA

    J. Nowak

  5. Department of Plant Sciences, Crop and Weed Ecology Group, Wageningen University, P.O. Box 430, 6700, Wageningen, AK, The Netherlands

    P. C. Struik

Authors
  1. K. Pruski
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  2. T. Astatkie
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  3. P. Duplessis
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  4. L. Stewart
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  5. J. Nowak
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  6. P. C. Struik
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Correspondence to K. Pruski.

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Pruski, K., Astatkie, T., Duplessis, P. et al. Manipulation of microtubers for direct field utilization in seed production. Am. J. Pot Res 80, 173–181 (2003). https://doi.org/10.1007/BF02855689

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  • DOI: https://doi.org/10.1007/BF02855689

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