A method for producing haploid Lolium plants may start with providing a Lolium multiflorum inducer line, the L. multiflorum inducer line having the ability to induce mitotic genome instability and haploid sectoring when hybridized as a maternal parent with a Lolium sp. paternal parent, such as previously disclosed lines IL1 and IL2. The inducer line may then be crossed with a Lolium sp. to generate F1 plants, and the F1 plants may be self-fertilized so as to recover seed from the selfed plant. The recovered seed may then be planted to generate one or more F2 plants, and at least one of the F2 plants may be a haploid Lolium plant.

A method for producing haploid Lolium plants may start with providing a Lolium multiflorum inducer line, the L. multiflorum inducer line having the ability to induce mitotic genome instability and haploid sectoring when hybridized as a maternal parent with a Lolium sp. paternal parent, such as previously disclosed lines IL1 and IL2. The inducer line may then be crossed with a Lolium sp. to generate F1 plants, and the F1 plants may be self-fertilized so as to recover seed from the selfed plant. The recovered seed may then be planted to generate one or more F2 plants, and at least one of the F2 plants may be a haploid Lolium plant.

A method is provided for use in analyzing seeds, in a population of seeds, for one or more desired characteristic. The method includes removing tissue from individual seeds in a population of seeds using an automated seed sampler, while preserving germination viability of the seeds, and analyzing the tissue for the presence or absence of one or more desired characteristic. The method then includes, based on the analysis of the tissue, quantifying the one or more desired characteristic for each of the individual seeds that possess the one or more desired characteristic.

The present invention relates to non-transgenic and transgenic plants, preferably crop plants, comprising a mutation causing an alteration of the amino acid sequence in the CATD domain of the centromere histone H3 (CENH3), preferably within the loop1 or the α2-helix of the CATD domain, which have the biological activity of a haploid inducer. Further, the present invention provides methods of generating the plants of the present invention and haploid and double haploid plants obtainable by crossing the plants of the present invention with wildtype plants as well as methods of facilitating cytoplasm exchange.

The present invention relates to non-transgenic and transgenic plants, preferably crop plants, comprising a mutation causing an alteration of the amino acid sequence in the CATD domain of the centromere histone H3 (CENH3), preferably within the loop1 or the α2-helix of the CATD domain, which have the biological activity of a haploid inducer. Further, the present invention provides methods of generating the plants of the present invention and haploid and double haploid plants obtainable by crossing the plants of the present invention with wildtype plants as well as methods of facilitating cytoplasm exchange.

Provided are methods for increasing the efficiency of creating doubled haploid plants by increasing the number of chances of forming a double haploid seed through treatment of a monocot plant with a plant growth regulator. In certain embodiments, maize plants are produced that comprise multiple co-dominant ears. Also provided are plants comprising the potential to generate increased numbers of doubled haploid offspring.

Provided are methods for increasing the efficiency of creating doubled haploid plants by increasing the number of chances of forming a double haploid seed through treatment of a monocot plant with a plant growth regulator. In certain embodiments, maize plants are produced that comprise multiple co-dominant ears. Also provided are plants comprising the potential to generate increased numbers of doubled haploid offspring.

Two Sorghum maternal haploid inducer lines SMHI01 and SMHI02 are provided including seed, plants and plant parts thereof. Methods for producing Sorghum haploid embryos using SMHI01 and SMHI02 are also provided. The Sorghum haploid embryos produced as a result of the use of either maternal haploid inducer line SMHI01 or SMHI02 may be doubled to produce doubled haploid embryos, seeds, and plants as part of a Sorghum breeding program.

Two Sorghum maternal haploid inducer lines SMHI01 and SMHI02 are provided including seed, plants and plant parts thereof. Methods for producing Sorghum haploid embryos using SMHI01 and SMHI02 are also provided. The Sorghum haploid embryos produced as a result of the use of either maternal haploid inducer line SMHI01 or SMHI02 may be doubled to produce doubled haploid embryos, seeds, and plants as part of a Sorghum breeding program.

The invention provides novel methods to genotype haploid embryos using molecular assays. For example, quantitative methods for genotyping are provided. The methods provided also include providing a plurality of haploid kernels, determining the genotype of the haploid embryo of said kernels by distinguishing its genotype from the endosperm genotype, selecting a kernel having a desired genotype and producing doubled haploid plant from the selected kernel.