Plant husbandry – Process
Patent
1996-10-16
1998-06-30
Fox, David T.
Plant husbandry
Process
47 59, 47 6, 800DIG42, 800240, A01B 7900, A01C 100, A01G 3100, A01G 106
Patent
active
057716331
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method for producing potato tubers comprising grafting a potato plant as a scion on a solanaceous plant as a stock and culturing the resultant graft plant by hydroponics to thereby form tubers on the top (aerial part) of the graft plant. Those tubers produced by this method are useful as seed potatoes.
BACKGROUND OF THE INVENTION
With respect to grafting using potato, there have been known a method in which a virus-infected potato plant is grafted on a new variety or a breeding material to thereby assay their resistance to the virus (for example, see Brown, C.R. et al., 1994, Euphytica 74:51-57); a method of utilizing grafting in crossing for breeding wherein potato is grafted on tomato to thereby promote the flowering of mother plants which are difficult to flower (Thijn, G.A., 1954, Euphytica 3:28-34) and so forth.
When grafting has been carried out using potato as a scion, occasionally tubers are formed on the top (aerial part) of the resultant graft plant. For example, Yoshida has reported that, when potato has been grafted on tomato, aerial tubers resembling those which are formed in the case of suffering from black scurf are formed in the middle of the stem (In Techniques for Culturing Potato in Hokkaido--Table Potato and Potato for Food Processing, supervised and edited by Kiyoshi Sunada, published by the Association for the Spread of Agricultural Technology in 1985). Ooms et al. have also reported that, when a transformed potato line Mb1501B has been grafted on an untransformed potato variety, tubers are formed on Mb150B on the top (G. Ooms & J.R. Lenton, Plant Molecular Biology 5:205-212, 1985).
Problem for Solution by the Invention
If such tubers formed on the top of a plant can be used as seed potatoes, it is possible to reduce harvesting lab or and also to improve the quality of seed tubers per se. However, the methods described above have various problems if they are utilized for production of seed potatoes. Thus, tubers formed on the top have not been used as seed tubers to date.
Summary of the Invention
The present inventor has intensively and extensively investigated into a method for forming on the top of a graft plant tubers appropriate as seed potatoes. As a result, the inventor has found that by culturing a graft plant by hydroponics, tubers become larger and a higher yield of them can be obtained. Thus, the invention has been achieved.
In other words, the present invention relates to a method for producing potato tubers comprising grafting a potato plant as a scion on a solanaceous plant as a stock and culturing the resultant graft plant by hydroponics to thereby form tubers on its top .
Now, the present invention will be described in detail.
In the present invention, grafting is performed using a solanaceous plant as a stock and a potato plant as a scion.
As a solanaceous plant which serves as a stock, any solanaceous plant may be used as long as it can be grafted with potato. For example, a plant belonging to the genus Solanum such as eggplant, potato which does not have an ability to form tubers; a plant belonging to the genus Lycopersicon such as tomato; a plant belonging to the genus Capsicum such as chili pepper; and a plant belonging to the genus Nicotiana such as tobacco may be enumerated.
As a potato plant, not only those plants belonging to Solanum tuberosum but also hybrid plants obtained by crossing Solanum tuberosum with other plants or mutants of Solanum tuberosum which have been spontaneously or artificially mutated may be used in the present invention as long as they have an ability to form tubers.
As a means to graft a solanaceous plant with potato, no special method is required. For example, conventional methods commonly applied to vegetables, such as cleft grafting, cutting grafting and air grafting, may be used.
The graft plant created by the above procedures is cultured to form tubers on its top. The culturing of the graft plant is performed by hydroponics. Briefly, the plant is cultured from the g
REFERENCES:
Brown et al. (1994) Euphytica 74:51-57.
Ooms et al. (1985) Plant Molecular Biology 5:205-212.
G.A. Thijn (1954) Euphytica 3:28-34.
Wheeler et al. (1990) American Potato Journal (67) pp. 177-187.
(1985) Assoc. for the Spread of Agr. Tech. Techniques for Culturing Potato in Hokkaido-Table Potato and Potato for Food Processing p. 71.
Akita et al. 1994. Plant Cell Reports 13:184-187.
Bell Kent L.
Fox David T.
Japan Tobacco Inc.
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