The presence and intensity of Pitra Dosha in a person's kundli is believed to be influenced by certain planets, with Rahu and Ketu playing a significant role. Here's how these planets are associated with Pitra Dosha:

1. Rahu: Rahu is considered to be the main planet responsible for Pitra Dosha. Its placement in the ninth house or its conjunction with the Sun, Moon, or Mars can indicate the presence of Pitra Dosha.

2. Ketu: Ketu is another planet that is closely linked to Pitra Dosha. Its conjunction with the ninth house lord or the Sun, Moon, or Mars can also contribute to the formation of Pitra Dosha.

While Rahu and Ketu are the primary planets associated with Pitra Dosha, other planetary positions and aspects in the birth chart can also influence its presence and effects. Consulting an astrologer can provide a more detailed analysis of the planetary influences on Pitra Dosha in an individual's Kundli.