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    Question

    In a breeding program focused on introducing a pest

    resistance gene into a commercial crop species, what is the most efficient breeding method if the donor plant is heterozygous for resistance?
    A Mass selection Correct Answer Incorrect Answer
    B Pure line selection Correct Answer Incorrect Answer
    C Pedigree selection Correct Answer Incorrect Answer
    D Backcross method Correct Answer Incorrect Answer
    E Single seed descent method Correct Answer Incorrect Answer

    Solution

    Backcross method. This method repeatedly crosses progeny back to one of the parents, aiming to recover the parental genotype while introducing the desired gene. In this scenario, to incorporate a pest resistance gene efficiently, the backcross method is appropriate because it allows the breeder to recover the genetic background of the recurrent parent while selecting for heterozygous resistance.

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