Method for determining meiotic recombination frequencies in plants, comprising the following steps: (a) obtaining a first plant having in a first locus of a nuclear chromosome a first expression cassette comprising in 5' to 3' direction: - a promoter functional in plant cells; - operatively linked thereto a nucleic acid sequence coding for the N-terminal part of a reporter protein; - a nucleic acid sequence coding for the N-terminal part of a first intein; and - optionally, operatively linked thereto a termination sequence functional in plant cells; (b) obtaining a second plant having in a second locus of a nuclear chromosome homologous to said nuclear chromosome of step (a) a second expression cassette comprising in 5' to 3' direction: - a promoter functional in plant cells; - operatively linked thereto a nucleic acid sequence coding for the C-terminal part of said first intein; - a nucleic acid sequence coding for the C-terminal part of said reporter protein; and - optionally, operatively linked thereto a termination sequence functional in plant cells; wherein the first and the second locus are different and wherein both the N-terminal and the C-terminal part of the reporter protein contain a sequence portion necessary for the function of the reporter protein; (c) crossing said first and said second plant to produce F1 progeny; and (d) analyzing the pollen of the F1 progeny for the expression of the reporter protein. (a) obtaining a first plant having in a first locus of a nuclear chromosome a first expression cassette comprising in 5' to 3' direction: - a promoter functional in plant cells; - operatively linked thereto a nucleic acid sequence coding for the N-terminal part of a reporter protein; - a nucleic acid sequence coding for the N-terminal part of a first intein; and - optionally, operatively linked thereto a termination sequence functional in plant cells; - a promoter functional in plant cells; - operatively linked thereto a nucleic acid sequence coding for the N-terminal part of a reporter protein; - a nucleic acid sequence coding for the N-terminal part of a first intein; and - optionally, operatively linked thereto a termination sequence functional in plant cells; (b) obtaining a second plant having in a second locus of a nuclear chromosome homologous to said nuclear chromosome of step (a) a second expression cassette comprising in 5' to 3' direction: - a promoter functional in plant cells; - operatively linked thereto a nucleic acid sequence coding for the C-terminal part of said first intein; - a nucleic acid sequence coding for the C-terminal part of said reporter protein; and - optionally, operatively linked thereto a termination sequence functional in plant cells; wherein the first and the second locus are different and wherein both the N-terminal and the C-terminal part of the reporter protein contain a sequence portion necessary for the function of the reporter protein; - a promoter functional in plant cells; - operatively linked thereto a nucleic acid sequence coding for the C-terminal part of said first intein; - a nucleic acid sequence coding for the C-terminal part of said reporter protein; and - optionally, operatively linked thereto a termination sequence functional in plant cells; wherein the first and the second locus are different and wherein both the N-terminal and the C-terminal part of the reporter protein contain a sequence portion necessary for the function of the reporter protein; (c) crossing said first and said second plant to produce F1 progeny; and (d) analyzing the pollen of the F1 progeny for the expression of the reporter protein.