Step 1: Understanding the Concept:
Guava (Psidium guajava) breeding programs focus on developing varieties with high yields, soft seeds, high TSS, and appealing fruit color.
Agricultural universities, such as CCS Haryana Agricultural University (HAU) in Hisar, have released several outstanding hybrids.
Step 2: Detailed Explanation:
"Hisar Safeda" (spelled "Hisra Safeda" in the question paper) is a highly valued commercial guava hybrid developed at HAU, Hisar.
It is developed from a cross between Allahabad Safeda as the female parent and Seedless as the male parent.
- Allahabad Safeda is a famous variety known for its large size, white pulp, high sugar content, and excellent shelf life, but it has numerous hard seeds.
- Seedless is a triploid cultivar that has virtually no seeds, but it suffers from low yields and misshapen fruits.
The cross Allahabad Safeda \( \times \) Seedless successfully combines the high yield, round shape, and sweetness of 'Allahabad Safeda' with the soft, fewer-seeded characteristics of 'Seedless'.
The resulting hybrid produces round, creamy-white fruits with a sweet pulp and a soft seed core, making it very popular among growers and consumers.
Step 3: Final Answer:
Hisar Safeda is a hybrid of Allahabad Safeda \( \times \) Seedless.