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حفظ الأنواع (Info)


كان الهدف من إجراء التعديل الوراثي على بعض الأنواع النباتية المهددة بالانقراض هو أن تصبح مقاومة للنباتات الغازية والآفات، مثل حفار ساق المران الزمردي في أمريكا الشمالية ومرض ذبول الدلب الفطري (الاسم العلمي:Ceratocystis platani) على أشجار الدلب في أوروبا. دمر فيروس التبقع الحلقي على البابايا (PRSV) أشجار البابايا في هاواي في القرن العشرين إلى أن أُدخلَت صفة المقاومة المستمدة من العامل الممرض على نباتات البابايا المعدلة وراثيًا. مع ذلك، يبقى إجراء التعديل الوراثي على النباتات لأغراض الحفظ منطويًا على المخاطرة. يوجد قلق خاص من ألا تبقى الأنواع المعدلة وراثيًا شبيهة بالأنواع الأصلية بشكل كافٍ يسمح لنا بالقول إننا عملنا حقًا على حفظ الأنواع الأصلية. قد تكون الأنواع المُعدلة وراثيًا مختلفةً وراثيًا كفايةً لاعتبارها أنواعًا جديدة، وبذلك تقل قيمة الحفظ الحيوي بالاعتماد على التعديل الوراثي.

Source: wikipedia.org
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