African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6849

Full Length Research Paper

Floral biology and phenology of sweet potato (Ipomoea batatas [L.] Lam.) in Cuba: Bases for genetic improvement

Alfredo Morales Rodríguez
  • Alfredo Morales Rodríguez
  • Plant Breeding and Genetic Resources Department, Research Institute of Tropical Roots and Tuber Crops (INIVIT), Santo Domingo, Villa Clara, Cuba.
  • Google Scholar
Dania Rodríguez del Sol
  • Dania Rodríguez del Sol
  • Plant Breeding and Genetic Resources Department, Research Institute of Tropical Roots and Tuber Crops (INIVIT), Santo Domingo, Villa Clara, Cuba.
  • Google Scholar
Sergio Rodríguez Morales
  • Sergio Rodríguez Morales
  • Plant Breeding and Genetic Resources Department, Research Institute of Tropical Roots and Tuber Crops (INIVIT), Santo Domingo, Villa Clara, Cuba.
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Yuniel Rodríguez García
  • Yuniel Rodríguez García
  • Plant Breeding and Genetic Resources Department, Research Institute of Tropical Roots and Tuber Crops (INIVIT), Santo Domingo, Villa Clara, Cuba.
  • Google Scholar
Nadir Trujillo Oviedo
  • Nadir Trujillo Oviedo
  • Plant Breeding and Genetic Resources Department, Research Institute of Tropical Roots and Tuber Crops (INIVIT), Santo Domingo, Villa Clara, Cuba.
  • Google Scholar
Alay Jiménez Medina
  • Alay Jiménez Medina
  • Plant Breeding and Genetic Resources Department, Research Institute of Tropical Roots and Tuber Crops (INIVIT), Santo Domingo, Villa Clara, Cuba.
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Osmany Molina Concepción
  • Osmany Molina Concepción
  • Plant Breeding and Genetic Resources Department, Research Institute of Tropical Roots and Tuber Crops (INIVIT), Santo Domingo, Villa Clara, Cuba.
  • Google Scholar


  •  Received: 28 August 2023
  •  Accepted: 29 September 2023
  •  Published: 30 November 2023

Abstract

Despite the fact that some aspects related to the flowering of the sweet potato have been studied previously, to date, in Cuba and tropical regions, only general descriptions have been documented without detailed information on the biology and floral phenology of the sweet potato, aspects of interest for genetic improvement. To carry out the research, four sweet potato genotypes obtained and released by the genetic improvement program of the Research Institute of Tropical Roots and Tuber Crops (INIVIT) were selected, one of them ("CEMSA 74-228") is of international reference. The average flower emission frequency per inflorescence was 1.5 days. The number of flowers per inflorescence fluctuated between 7.35 and 26.14. The time from pollination to seed maturation varied on average from 22.8 to 32.3 days. For the four genotypes, different moments of anthesis were found, ranging from 0444 h (± 8.3 min) to 0619 h (± 10.7 min). The pollen presented viability percentages above 90% from 0600 to 1300 h. The results allowed a better knowledge of the floral biology of the sweet potato and the floral phenological phases and the approximate time of each one was determined, which will be useful for plant breeders

Key words: Biology, flowering, phenology, Ipomoea batatas, pollination.