Cross-incompatibility traits from teosinte and their use in corn
AssigneeWisconsin Alumni Research Foundation
InventorsJerry Kermicle, Matthew Evans, Steven Gerrish
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Abstract
The present invention relates to a teosinte crossing barrier trait. Plants containing said trait exhibit the phenotype of cross-incompatiblity. The present invention also relates to new cross-incompatible plants, including inbred, hybrid, haploid, apomictic and/or genetically engineered plants, containing the teosinte crossing barrier trait and exhibiting commercially desirable characteristics.
Claims68
A cross-incompatible maize plant comprising a TCB trait.
The cross-incompatible maize plant of claim 9 further comprising a gene cluster within its genome wherein said gene cluster is located on the short arm of chromosome 4 between map units 40-85.
A cross-incompatible maize plant comprising a TCB trait and which (1) fails to set seed when pollinated by plants lacking the TCB trait but sets seed when pollinated by plants carrying the TCB trait;
- and (2) maintains functional pollen and sets seed when pollinated by itself or causes other maize plants to set seed when pollinated by said plant.
A cross-incompatible maize plant comprising a TCB trait and wherein said TCB trait is derived from plant W22-TCB deposited as ATCC No. PTA-1601.
A process for obtaining an inbred maize plant, which when crossed with a second inbred maize plant, produces a hybrid maize plant which is cross-incompatible and contains a TCB trait, the process comprising the steps of:
- a) selecting a first donor parental maize plant from a population of maize plants, wherein said first donor parental maize plant is cross-incompatible and contains a TCB trait;
- b) crossing said selected first donor parental maize plant with a second parental maize plant containing genes which encode for desirable traits in hybrid combination;
- c) collecting the seed resulting from the cross in step b);
- d) planting and growing the seed collected in step c) under plant growth conditions;
- e) screening the resulting plant population for the presence of the TCB trait identified in step (a);
- and
- f) selecting plants from said population having the TCB trait for cross-incompatibility for further crossings and screenings until a line is obtained which is homozygous for the TCB trait for cross-incompatibility to provide such a trait in an inbred to be used in hybrid combination.
A process for selecting a first donor parental maize plant suitable for use in producing an inbred maize plant, which inbred maize plant, if crossed with a second inbred maize plant, produces a hybrid maize plant which is cross-incompatible and contains a TCB trait, the process comprising the steps of:
- analyzing each plant from a population of maize plants for the presence of a TCB trait.
A process for selecting a cross-incompatible hybrid maize plant containing a TCB trait, the process comprising the steps of:
- analyzing each plant from a population of hybrid maize plants for the a TCB trait.
Dependencies are inferred from the claim text.