2006
DOI: 10.1590/s1677-04202006000100004
|View full text |Cite
|
Sign up to set email alerts
|

Abstract: The genus Coffea L. has around 100 native species distributed in tropical and subtropical areas in Africa, and the most important economic species are C. arabica and C. canephora. C. arabica is exceptional in the genus since it is the only species so far analyzed which is self-compatible, and a natural polyploid with 2n=4x=44 chromosomes; it is considered to be a segmental allopolyploid because it presents a disomic inheritance and a regular meiotic behavior. All other species in the genus are selfincompatible… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

0
23
0

Year Published

2008
2008
2023
2023

Publication Types

Select...
5
3
1

Relationship

0
9

Authors

Journals

citations
Cited by 19 publications
(23 citation statements)
references
References 21 publications
0
23
0
Order By: Relevance
“…salvatrix displayed the highest mean values for THCL, χchrom, S (µm) and S%, however, the lowest valtempt to visualize and count the mitotic chromosomes of the ovules. Thenceforth, the studies developed in the genus of species ranged from the identification of the most probable genomes involved in the Arabica origin (Pinto-Maglio and Cruz, 1987), the establishment of the first karyogram and ideogram for C. arabica based on pachytene chromosomes (Pinto-Maglio and Cruz, 1998), following studies in several diploid species to determine the nuclear content (Cros et al, 1998), the heterochromatin localization and quantification in mitotic chromosomes (Pierozzi et al, 1999) and subsequently the heterochromatin molecular composition, as reviewed by Pinto-Maglio (2006) and Hamon et al (2009). The first approaches in coffee chromosome studies however concerned the establishment of chromosome number which led to the finding that wild species are diploid (2n=22) while the Arabica varieties and cultivars are predominantly tetraploid (2n=44) with several hexaploid (2n=66) and octoploid (2n=88) exceptions (Krug, 1934(Krug, , 1945.…”
Section: Resultsmentioning
confidence: 99%
“…salvatrix displayed the highest mean values for THCL, χchrom, S (µm) and S%, however, the lowest valtempt to visualize and count the mitotic chromosomes of the ovules. Thenceforth, the studies developed in the genus of species ranged from the identification of the most probable genomes involved in the Arabica origin (Pinto-Maglio and Cruz, 1987), the establishment of the first karyogram and ideogram for C. arabica based on pachytene chromosomes (Pinto-Maglio and Cruz, 1998), following studies in several diploid species to determine the nuclear content (Cros et al, 1998), the heterochromatin localization and quantification in mitotic chromosomes (Pierozzi et al, 1999) and subsequently the heterochromatin molecular composition, as reviewed by Pinto-Maglio (2006) and Hamon et al (2009). The first approaches in coffee chromosome studies however concerned the establishment of chromosome number which led to the finding that wild species are diploid (2n=22) while the Arabica varieties and cultivars are predominantly tetraploid (2n=44) with several hexaploid (2n=66) and octoploid (2n=88) exceptions (Krug, 1934(Krug, , 1945.…”
Section: Resultsmentioning
confidence: 99%
“…This approach enabled identification of parental chromosome sets but no individual chromosome identification was possible (Barre et al 1998). Differences were reported in the rDNA locus number and band number after fluorochrome staining (DAPI and CMA) among Coffea species (Pinto-Maglio 2006). However, no information on chromosome localization could be obtained from any previous experiments.…”
Section: Introductionmentioning
confidence: 99%
“…To study the plant species with small chromo somes, various cytogenetic markers are typically used including 45S and 5S rDNA [35,37,51,52]. Informa tion on 26S and 5S rDNA loci was included in the "chromosome passport" of M. cordata to improve its reliability and information value (Fig.…”
Section: Discussionmentioning
confidence: 99%