## Abstract

Phylogenetic Diversity (PD) is a prominent quantitative measure of the biodiversity of a collection of present-day species (taxa). This measure is based on the evolutionary distance among the species in the collection. Loosely speaking, if T is a rooted phylogenetic tree whose leaf set X represents a set of species and whose edges have real-valued lengths (weights), then the PD score of a subset S of X is the sum of the weights of the edges of the minimal subtree of T connecting the species in S. In this paper, we define several natural variants of the PD score for a subset of taxa which are related by a known rooted phylogenetic network. Under these variants, we explore, for a positive integer k, the computational complexity of determining the maximum PD score over all subsets of taxa of size k when the input is restricted to different classes of rooted phylogenetic networks.

Original language | English (US) |
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Pages (from-to) | 66-80 |

Number of pages | 15 |

Journal | Theoretical Computer Science |

Volume | 917 |

DOIs | |

State | Published - May 25 2022 |

Externally published | Yes |

## All Science Journal Classification (ASJC) codes

- Theoretical Computer Science
- Computer Science(all)

## Keywords

- Phylogenetic diversity
- Phylogenetic network
- Phylogenetic tree