| 11. | They are still threatened because of crossbreeding with domestic and feral cats.
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| 12. | It is capable of producing substantial hybrid vigor when used for crossbreeding.
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| 13. | His results of crossbreeding experiments on file with the Northern Nutgrowers Association.
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| 14. | Farmers have been crossbreeding plants for centuries to produce ones with desired traits.
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| 15. | Bread wheat is not naturally occurring and had to be developed through crossbreeding.
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| 16. | Crossbreeding between populations also often has positive effects on fitness-related traits.
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| 17. | Jack Russell traits often remain visible despite this crossbreeding.
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| 18. | G . D . Karpechenko specialized in plant polyploid speciation during experimental crossbreeding.
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| 19. | Improvements continued to be made through crossbreeding with blooded Hereford and Angus stock.
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| 20. | The Beaglier became particularly popular through crossbreeding programs in Australia during the 1990s.
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