Nuclear genome size, ploidy level and endopolyploidy pattern in six species of Opuntia (Cactaceae) (Record no. 50709)

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fixed length control field 02374nam a2200277Ia 4500
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control field MX-MdCICY
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control field 20250625160153.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-16539
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Title Nuclear genome size, ploidy level and endopolyploidy pattern in six species of Opuntia (Cactaceae)
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Volume/sequential designation Caryologia, 69(1), p.82-89, 2016
520 3# - SUMMARY, ETC.
Summary, etc. This study describes the haploid chromosome number (n), recombination index (RI), ploidy level and DNA content by DNA flow cytometry of six Opuntia (prickly pear)species from Mexico. Opuntia heliabravoana was diploid (2n =2x = 22, x = 11)with RI = 26; O. jonocostle, O. matudae and O. oligacantha were hexaploid (2n = 6x = 66)with RI = 74, 71, and 83, respectively; and O. hyptiacantha and O. tomentosa were octoploid (2n = 8x = 88)with RI = 99 and 103, respectively. The 2C DNA content was 3.81 pg in Opuntia heliabravoana. For hexaploid species 2C DNA content was: O. jonocostle = 5.84, O. matudae = 5.91 and O. oligacantha = 5.98 pg. The octoploid species O. hyptiacantha and O. tomentosa showed 2C DNA = 7.39 and 7.43 pg, respectively. The 1Cx = 1.91 pg for diploid O. heliabravoana was 52 percent higher than the hexaploid species (mean 1Cx = 0.99 pg)and 48 percent higher than the octoploid species (mean 1Cx = 0.93 pg). These results suggest a loss of some DNA sequences after polyploidization in these Opuntia species. All accessions showed endopolyploidy, defined by the presence of nuclear populations of 2, 4 and 8C in cells of the stem parenchyma. The presence of endopolyploidy and polyploidy in prickly pear provide these plants with adaptive advantages in arid and semiarid environments. These results provide useful guidelines to set conservation strategies and breeding approaches for Opuntia species. © 2016 Dipartimento di Biologia Evoluzionistica, Università di Firenze.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element ENDOPOLYPLOIDY
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GENOME SIZE
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Topical term or geographic name entry element OPUNTIA
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element PLOIDY LEVEL
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Personal name Palomino, G.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Martínez, J.
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Personal name Méndez, I.
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Personal name Muñoz-Urías, A
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Personal name Cepeda-Cornejo, V
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Personal name Pimienta-Barrios, E.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1rO8W4kKmEopAG1fU3pJIcT5F6X5_ErmI/view?usp=drivesdk">https://drive.google.com/file/d/1rO8W4kKmEopAG1fU3pJIcT5F6X5_ErmI/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-16539 25.06.2025 25.06.2025 Documentos solicitados