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  • ICAR and TNAU E-Course Summarized

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  • Allo-octaploid variety of mango

    Question: Allo-octaploid variety of mango

    Options:

    Vellaikolamban
    Amrapali
    Alphonso
    none of these

    ✅ EXPLANATION:: An allo-octaploid variety of mango has eight sets of chromosomes, which is twice the number found in most mangoes (diploid) and four times the number found in tetraploid varieties. This unique genetic makeup contributes to several distinctive characteristics of Vellaikolamban: 2n =8x=80
    🔹Giant size: These mangoes are known for their large size, weighing up to 2 kg (4.4 lbs). Their elongated, kidney-shaped form and vibrant golden-yellow skin stand out from other varieties.
    🔹Rich flavor: Vellaikolamban has balanced sweetness and tanginess, with a hint of floral aroma. The texture is firm yet yielding, giving a melt-in-your-mouth experience. Delayed ripening: Unlike most mangoes, Vellaikolamban matures in May or June. This extended ripening period allows deeper flavor development, resulting in an explosion of taste.
    🔹Disease resistance: The allo-octaploid nature provides natural resistance to common mango diseases like anthracnose and powdery mildew.

    📌Other Options and Explanations:
    🔹Amrapali: Although this too is a popular Indian hybrid with large fruits and delayed ripening, Amrapali is a tetraploid variety. This means it contains four sets of chromosomes, resulting in smaller fruits and a distinct flavor profile than Vellaikolamban.
    🔹Alphonso: This renowned "King of Mangoes" is known for its exquisite taste and intoxicating aroma. However, Alphonso is a diploid variety that has a distinct flavor profile and is significantly smaller in size than the allo-octaploid giant.

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