Step 1: Understanding the Concept:
Papaya (Carica papaya) varieties are classified into two main categories based on their sex forms: dioecious (having separate male and female plants) and gynodioecious (having female and hermaphrodite/bisexual plants).
Step 2: Detailed Explanation:
Let us examine the facts concerning 'Punjab Sweet', a prominent papaya variety released by Punjab Agricultural University (PAU), Ludhiana:
1. It is indeed a cultivated variety of papaya, which makes option (A) true.
2. It was developed through selection and sibmating of germplasm lines introduced from Kenya, making option (B) true.
3. 'Punjab Sweet' is classified as a gynodioecious cultivar, not dioecious.
Gynodioecious varieties produce female and hermaphrodite trees, meaning all plants in the field produce fruit, eliminating the need to maintain non-fruiting male plants as in dioecious varieties.
Thus, stating "It is dioecious" is false, making option (C) the correct choice for this "not true" question.
4. The fruits of 'Punjab Sweet' are medium-sized, pear-shaped, with sweet yellow flesh, weighing around 400 to 500 grams, which makes option (D) true.
Step 3: Final Answer:
The statement "It is dioecious" is not true for Punjab Sweet.