The trend is even more glaring at the state level. In Maharashtra, analysts estimate that 30 or more party candidates running this month are from political families. The state’s chief minister, the top executive post, is the son of a former chief minister. This is also the case in two other states while the Congress Party is strongly considering replacing the late chief minister of Andhra Pradesh with his son.

“It has gotten into the DNA of the Indian political system,” said Jagdeep Chhokar, a founding member of the Association for Democratic Reform in New Delhi. “To control the workings of the party, the leader depends on trusted people. And one of the traditions of Indian culture is that you trust family members more than outsiders.”

Indian politics have a high turnover rate and voting blocs can be defined by region, religion, caste or community. Yet analysts say Indian voters favor a familiar family pedigree, partly because of a cultural reverence for the family and because of habits in some regions that trace back centuries. Several of the royal families who ruled over feudal states have today evolved into political families.

Modern India’s political marketplace is so crowded with parties and candidates that the “brand” of a familiar family name can bring an advantage, several analysts say. And the closed nature of political parties often perpetuates the dynastic problem; in several cases, rebels who broke from one party have formed their own and installed relatives around them.

Few political families are eager to step away from the power and lucre of office. In the state of Haryana, which has several local political dynasties, a recent study concluded that incumbents running for re-election had increased their personal wealth, on average, by 388 percent during their five years in office.

“Every political family these days is keen to keep someone in the field,” said Suhas Palshikar, who teaches politics at Pune University in Maharashtra. “Lots of resources are involved. Lots of networks are involved. And to put it crudely, a lot of money is involved.”

Mrs. Patil, 74, the Indian president, has less than three years remaining in her term. The position of president is largely ceremonial, with real power invested in the prime minister and his cabinet, though the presidency does command deference. Mrs. Patil’s press officer said the president had not been involved in her son’s candidacy but that the son, like anyone, has a constitutional right to seek office.