Molecular genetic diversity and mating system in sacha inchi progenies

Authors

  • Mágno Sávio Ferreira Valente Universidade Federal do Amazonas
  • Maria Teresa Gomes Lopes Universidade Federal do Amazonas
  • Francisco Célio Maia Chaves Empresa Brasileira de Pesquisa Agropecuária
  • Mozanil Correia Pantoja Universidade Federal do Amazonas
  • Francy Mary Galúcio Sousa Universidade Federal do Amazonas
  • Edvan Alves Chagas Empresa Brasileira de Pesquisa Agropecuária

Keywords:

Plukenetia volubilis L., plant breeding, AFLP marker.

Abstract

Sacha inchi (Plukenetia volubilis L.) is a species with nutraceutical benefits traditionally consumed by Amazonic indigenous and urban communities. Studies on the genetic diversity and mating system are required to preserve and make the best use of the genetic resources for this species. This study aimed to estimate the genetic diversity and mating system parameters of sacha inchi progenies using Amplified Fragment Length Polymorphism (AFLP) markers. A total of 360 progenies from 30 accessions of sacha inchi were analyzed using three AFLP primers combinations. The percentage variation between and within families and the crossing rate, among other parameters, were estimated. The AFLP markers were efficient in genetically differentiating progenies, revealing 251 (98.82 %) polymorphic fragments. The analysis of molecular variance showed that the strongest variation occurs between progenies (57.16 %). However, the genetic differentiation within progenies was considerable (42.84 %), and could be exploited in breeding programs. The estimated population outcrossing rate was high (0.957), indicating it is a predominantly allogamous species. On the other hand, 33.7 % of the crosses occurred between related individuals. The estimate for biparental crosses revealed that the progenies consisted mainly of half-siblings (66.9 %) and full-siblings (28.8 %). For purposes of breeding and ex situ genetic conservation, sacha inchi seeds should be collected from a large number of parent plants.

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Author Biographies

Mágno Sávio Ferreira Valente, Universidade Federal do Amazonas

Faculdade de Ciências Agrárias

Maria Teresa Gomes Lopes, Universidade Federal do Amazonas

Faculdade de Ciências Agrárias

Francisco Célio Maia Chaves, Empresa Brasileira de Pesquisa Agropecuária

Embrapa Amazônia Ocidental

Edvan Alves Chagas, Empresa Brasileira de Pesquisa Agropecuária

Embrapa Roraima

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Published

2018-01-29

How to Cite

VALENTE, M. S. F.; LOPES, M. T. G.; CHAVES, F. C. M.; PANTOJA, M. C.; SOUSA, F. M. G.; CHAGAS, E. A. Molecular genetic diversity and mating system in sacha inchi progenies. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 47, n. 4, p. 480–487, 2018. Disponível em: https://revistas.ufg.br/pat/article/view/49799. Acesso em: 11 mar. 2025.

Issue

Section

Research Article