Abstract: According to this invention, a gene cluster involved in the non-mevalonate pathway of Hevea brasiliensis was obtained and nucleotide sequences of these genes were determined. The gene cluster according to this invention involved in the IPP biosynthesis in the non-mevalonate pathway is involved in the biosynthesis of vitamin E and carotenoids. Therefore, the Hevea brasiliensis obtained by introducing the gene cluster of the present invention can be expected to produce high-quality rubber with improved permanence.

Abstract: An object of the present invention is to provide a method for efficiently producing polyploids in para rubber trees that are extremely useful for breeding new varieties. The method of the present invention is characterized by carrying out colchicine treatment on para rubber tree (Hevea brasiliensis) seeds after rooting. In the present invention, the seeds are preferably seeds that have rooted but have not yet germinated. In addition, colchicine treatment is preferably carried out by allowing the seeds to contact a colchicine solution having a colchicine concentration of 400 ppm to 800 ppm.

Abstract: According to the present invention, a gene cluster encoding various kinds of prenyl transferase of Hevea brasiliensis is obtained, and the nucleotide sequences of these genes are determined. The prenyl transferases are involved in the biosynthesis of isoprene backbone of natural rubber. Therefore, improvement of productivity of rubber can be expected, by transforming plants by the gene cluster obtained in the present invention.

Abstract: It is a subject of this invention to isolate a gene group of enzymes involved in the biosynthesis of vitamin E of Para rubber tree, and to determine the base sequence of each gene. According to this invention, genes encoding enzymes involved in the vitamin E biosynthesis were isolated from Para rubber tree and the base sequences of these genes were determined. Since vitamin E is an antioxidant existing in nature, it is expected that transformation of a plant by using the genes obtained in the invention would result in an increase in the vitamin E content of the plant and, in its turn, contribute to the prevention of rubber from aging.

Abstract: According to this invention, a gene cluster involved in the non-mevalonate pathway of Hevea brasiliensis was obtained and nucleotide sequences of these genes were determined. The gene cluster according to this invention involved in the IPP biosynthesis in the non-mevalonate pathway is involved in the biosynthesis of vitamin E and carotenoids. Therefore, the Hevea brasiliensis obtained by introducing the gene cluster of the present invention can be expected to produce high-quality rubber with improved permanence.

Abstract: According to this invention, a gene cluster involved in the non-mevalonate pathway of Hevea brasiliensis was obtained and nucleotide sequences of these genes were determined. The gene cluster according to this invention involved in the IPP biosynthesis in the non-mevalonate pathway is involved in the biosynthesis of vitamin E and carotenoids. Therefore, the Hevea brasiliensis obtained by introducing the gene cluster of the present invention can be expected to produce high-quality rubber with improved permanence.

Abstract: It is a subject of this invention to isolate a gene group of enzymes involved in the biosynthesis of vitamin E of Para rubber tree, and to determine the base sequence of each gene. According to this invention, genes encoding enzymes involved in the vitamin E biosynthesis were isolated from Para rubber tree and the base sequences of these genes were determined. Since vitamin E is an antioxidant existing in nature, it is expected that transformation of a plant by using the genes obtained in the invention would result in an increase in the vitamin E content of the plant and, in its turn, contribute to the prevention of rubber from aging.

Abstract: According to the present invention, a gene cluster encoding various kinds of prenyl transferase of Hevea brasiliensis is obtained, and the nucleotide sequences of these genes are determined. The prenyl transferases are involved in the biosynthesis of isoprene backbone of natural rubber. Therefore, improvement of productivity of rubber can be expected, by transforming plants by the gene cluster obtained in the present invention.

Abstract: According to the present invention, a gene cluster encoding various kinds of prenyl transferase of Hevea brasiliensis is obtained, and the nucleotide sequences of these genes are determined. The prenyl transferases are involved in the biosynthesis of isoprene backbone of natural rubber. Therefore, improvement of productivity of rubber can be expected, by transforming plants by the gene cluster obtained in the present invention.

Abstract: According to the present invention, a gene cluster encoding various kinds of prenyl transferase of Hevea brasiliensis is obtained, and the nucleotide sequences of these genes are determined. The prenyl transferases are involved in the biosynthesis of isoprene backbone of natural rubber. Therefore, improvement of productivity of rubber can be expected, by transforming plants by the gene cluster obtained in the present invention.

Abstract: According to this invention, a gene cluster involved in the non-mevalonate pathway of Hevea brasiliensis was obtained and nucleotide sequences of these genes were determined. The gene cluster according to this invention involved in the IPP biosynthesis in the non-mevalonate pathway is involved in the biosynthesis of vitamin E and carotenoids. Therefore, the Hevea brasiliensis obtained by introducing the gene cluster of the present invention can be expected to produce high-quality rubber with improved permanence.