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Chloroplast capture is an evolutionary phenomenon that an inter-species hybridization and subsequent backcrossing genetic exchanges would yield a plant with new genetic combination. For instance, 1) species A's (having chloroplast genome a and nuclear genome AA) pollen is hybridize (backcross) to species B's (b and BB) ovule, then 1st hybrid (F1) with chloroplast genome b and nuclear genome A (50%) and B (50%) comes; 2) species A's pollen is again hybridize (backcross) to F1's ovule, then 2nd hybrid (F2) with chloroplast genome b and nuclear genome A (75%) and B (25%) comes; 3) species A's pollen is again hybridize (backcross) to F2's ovule, then 3rd hybrid (F3) with chloroplast genome b and nuclear genome A (87.5%) and B (12.5%) comes; 4) after some generations, a plant with new genetic combination (chloroplast genome b and nuclear genome A) will rise.
Known cases of chloroplast capture
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