Sexual stages of Puccinia graminis tritici are confined to

Options

A. Wheat
B. Barberry
C. Thallictrum
D. none of these

Answer

To answer the question about where the sexual stages of Puccinia graminis tritici are confined, we can follow these steps:

### Step 1: Understand the Organism
Puccinia graminis tritici is a fungal pathogen known for causing wheat rust. It has a complex life cycle that includes both asexual and sexual reproduction stages.

**Hint:** Familiarize yourself with the life cycle of Puccinia graminis tritici, including its hosts and reproduction methods.

### Step 2: Identify Hosts
Puccinia graminis tritici has two types of hosts: a primary host and a secondary host. The primary host for this fungus is wheat (Triticum species), while the secondary host is barberry (Berberis species).

**Hint:** Remember that the primary host is where the asexual reproduction occurs, while the secondary host is crucial for sexual reproduction.

### Step 3: Determine the Sexual Reproduction Site
The sexual reproduction of Puccinia graminis tritici occurs on the secondary host, which is the barberry plant. The sexual stage involves the transfer of gametes (spermatia) between the barberry leaves, facilitated by insects.

**Hint:** Focus on the role of the barberry plant in the life cycle of Puccinia graminis tritici, especially regarding sexual reproduction.

### Step 4: Conclusion
Based on the understanding of the life cycle and the roles of the hosts, we conclude that the sexual stages of Puccinia graminis tritici are confined to the barberry plant.

**Final Answer:** The sexual stages of Puccinia graminis tritici are confined to **barberry**.