Sucrose accumulating tomato technology
AssigneeThe Regents of the University of California
InventorsAlan B. Bennett, Serge Yelle
Life of this patent
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Abstract
A new tomato cultivar is provided which is homozygous for a genetically fixable recessive genetic factor which confers the ability to bear fruit that accumulate sucrose. The increased sucrose content, in turn, leads to a higher total soluble solids content in the mature fruit. Higher total soluble solids in tomato fruit are of particular importance to the tomato processing industry. A method for producing the claimed cultivar is also provided. The claimed genetic factor can be derived from any Lycopersicon species which accumulates sucrose in the mature fruit. Once genetically fixed in a tomato cultivar, the factor can be transmitted to other plants in a predictable manner.
Claims24
A method for introducing into a Lycopersicon esculentum plant a single, recessive genetic factor which confers on the tomato plant the ability to bear a mature fruit having a sucrose content of about 100 .mu.mol per gram fresh weight, the method comprising:
- a. crossing the tomato plant with a second plant in the genus Lycopersicon, which is homozygous for the genetic factor, thereby producing an F.sub.1 generation;
- b. selfing the F.sub.1 plants, thereby producing an F.sub.2 generation;
- c. selecting F.sub.2 plants which produce mature fruit having a sucrose content of a bout 100 .mu.mol per gram fresh weight;
- d. back-crossing the selected F.sub.2 plants with L. esculentum, thereby producing a BC.sub.1 F.sub.1 generation;
- e. selfing the BC.sub.1 F.sub.1 plants, thereby producing a BC.sub.1 F.sub.2 generated;
- f. selecting BC.sub.1 F.sub.2 plants which produce mature fruit having a sucrose content of about 100 .mu.mol per gram fresh weight, and which are homozygous for a TG102 allele associated with the second plant.
A genetically fixed, recessive genetic factor which confers on a Lycopersicon esculentum plant the ability to bear a mature fruit having sucrose content from about 20 .mu.mol per gram fresh weight to about 175 .mu.mol per gram fresh weight, wherein the genetic factor is located adjacent a TG102 marker on chromosome 3.
A Lycopersicon esculentum plant which is homozygous for a single, recessive genetic factor which confers on the plant the ability to bear a mature fruit having a sucrose content from about 20 .mu.mol per gram fresh weight to about 175 .mu.mol per gram fresh weight, wherein the genetic factor is located adjacent a TG102 marker on chromosome 3.
A Lycopersicon esculentum seed which is homozygous for a single, recessive genetic factor which confers on a plant derived from the seed the ability to bear a mature fruit having a sucrose content from about 20 .mu.mol per gram fresh weight to about 175 .mu.mol per gram fresh weight, wherein the genetic factor is located adjacent a TG102 marker on chromosome 3.
Dependencies are inferred from the claim text.