Seed morphology and cytogenetic characterization of an endangered wild cotton, Gossypium turneri Fryxell, from Mexico

Karla Fabiola Yescas-Romo, Francisco Elizandro Molina-Freaner, Francisca Ramírez-Godina, M. Humberto Reyes-Valdés, Octavio Martínez, Corina Hayano-Kanashiro*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Cotton (genus Gossypium) is an important agricultural crop around the world because of its fiber. Gossypium turneri Fryxell is a wild cotton species endemic to the state of Sonora (northwestern Mexico), whose status has been recently raised to endangered in the IUCN Red List. This species has invaluable characteristics that could be useful in the cultivated cotton gene pool. Despite its importance, G. turneri has been studied very little. To the best of our knowledge, no previous study has characterized its seed morphology and cytogenetics. Therefore, in the present study the seed morphology and karyotype of G. turneri were analyzed. Seeds of G. turneri have nonuniform oval shape and brown-gray color. This species produces short fibers attached to its seed surface that are not long enough for commercial use. Our seed sizes were greater than those previously described for G. turneri and other diploid cottons. The length and width of seeds were 8.80 mm and 4.83 mm, respectively. Traits such as embryo and seed coat were measured and carefully observed, and gossypol glands were observed only in the embryo during the evaluation of internal features of seeds. Cytogenetic analysis revealed 26 chromosomes (2n = 2x = 26) in mitotic cells of G. turneri. The karyotype analysis showed mainly metacentric (m), submetacentric (sm) and subtelocentric (st) chromosomes. Our results reveal important biological traits of G. turneri that could be considered in future studies to improve cultivated cotton.

Original languageEnglish
Pages (from-to)2119-2129
Number of pages11
JournalGenetic Resources and Crop Evolution
Volume68
Issue number5
DOIs
StatePublished - Jun 2021

Bibliographical note

Funding Information:
K.F. Y-R thanks the Consejo Nacional de Ciencia y Tecnología (CONACyT-Mexico) for fellowship No. 722292. We gratefully acknowledge A.C. Mariela Villela Orejón, A.M. Leticia De León and PhD Areli Gonzaléz Cortés for their support and training in seed sample processing in the lab. We also thank PhD Adriana Antonio Bautista for her help during seed germination, and Departamento de Investigaciones Cientificas y Tecnológicas and División de Ciencias Biológicas y de la Salud (Universidad de Sonora) for their support with the field trips and travel expenses for K.F. Y-R. Finally, we thank MSc. Marielena Clark-Rivera and Abelardo Martínez for their help with the field trips.

Funding Information:
K.F. Y-R thanks the Consejo Nacional de Ciencia y Tecnología (CONACyT-Mexico) for fellowship No. 722292. We gratefully acknowledge A.C. Mariela Villela Orejón, A.M. Leticia De León and PhD Areli Gonzaléz Cortés for their support and training in seed sample processing in the lab. We also thank PhD Adriana Antonio Bautista for her help during seed germination, and Departamento de Investigaciones Cientificas y Tecnológicas and División de Ciencias Biológicas y de la Salud (Universidad de Sonora) for their support with the field trips and travel expenses for K.F. Y-R. Finally, we thank MSc. Marielena Clark-Rivera and Abelardo Martínez for their help with the field trips.

Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.

Keywords

  • Chromosome number
  • Gossypium turneri
  • Karyotype
  • Seed morphology

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