Hybrid seed production
AssigneeResearch Corporation
InventorWalton C. Galinat
Life of this patent
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Abstract
The use of alien chromosomes from Tripsacum to mask the expression of undesirable recessive traits in the production of hybrid corn seed is disclosed. When an alien addition monosome is used as a parent in a hybrid cross, the low transmission rate of the alien chromosome results in the expression of desirable traits in the progeny which were masked with the undesirable traits.
Claims13
A method for masking the expression of an undesirable recessive trait in the production of hybrid corn comprising the steps of:
- selecting a corn which is homozygous for said trait;
- incorporating into said corn a Tripsacum chromosome which has the dominant allele for said trait and which also has the capability of genetically interacting with said corn to produce, upon selfing, an endosperm phenotype sufficiently recognizable to determine whether said endosperm carries said chromosome;
- and
- selfing said corn to increase said endosperm carrying said chromosome.
A method for producing hybrid corn seed comprising the steps of:
- selecting a first corn having a homozygous recessive gene system which results in the expression of a desirable trait and an undesirable trait;
- incorporating into said first corn a Tripsacum chromosome having the capability of masking said undesirable trait;
- crossing said first corn as either parent with a second corn having a gene system capable of interacting with the gene system of said first corn to produce corn seed which does not carry said chromosome and which either has said desirable trait or will produce some offspring having said desirable trait;
- and
- harvesting said corn seed.
A method for producing hybrid corn seed comprising the steps of:
- selecting a first corn having a homozygous recessive gene system which results in the expression of a desirable trait and an undesirable trait;
- obtaining an alien addition monosomic version of said first corn containing a Tripsacum chromosome capable of inhibiting the expression of said undesirable trait;
- crossing said alien addition monosomic version as either parent with a second corn to produce corn seed at least a portion of which does not carry said chromosome and either has or will produce some offspring which have said desirable trait.
A method for producing hybrid sweet corn seed comprising the steps of:
- selecting a first corn which is homozygous for the recessive combination sugary-shrunken 2 (genotype su sh2);
- incorporating into said corn the seventh chromosome of Tripsacum to obtain an alien addition monosome corn (genotype su sh2:
- Tr7(1));
- crossing said alien addition monosome corn as either parent with a sweet corn (genotype su Sh2) to obtain hybrid sweet corn seed;
- and
- harvesting said seed.
A method for producing hybrid sweet corn seed comprising the steps of:
- selecting a first corn which is homozygous for the recessive combination su shl wx c;
- incorporating into said corn the fifth chromosome of Tripsacum to obtain an alien addition monosomic version thereof;
- crossing said alien addition monosomic version with a sweet corn of genotype su Shl Wx C;
- and
- harvesting the progeny as seed.
Dependencies are inferred from the claim text.