NDLI: Evidence of Intergenomic Relationships in Triploid Hybrids of Coffee (Coffea sp.) as Revealed by Meiotic Behavior and Genomic in Situ Hybridization

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Response of Endogenous Hormone Concentrations to Two Floral Inductive Treatments, viz. KNO$_{3}$ and PBZ, in Mango cv. ‘Tommy Atkins’ Growing Under Tropical Conditions

Tropical Plant Biology : Volume 5, Issue 2, June 2012

Tropical Plant Biology : Volume 5, Issue 1, March 2012

Tropical Plant Biology : Volume 4

Tropical Plant Biology : Volume 3

Tropical Plant Biology : Volume 2

Tropical Plant Biology : Volume 1

Evidence of Intergenomic Relationships in Triploid Hybrids of Coffee (Coffea sp.) as Revealed by Meiotic Behavior and Genomic in Situ Hybridization

Content Provider	Springer Nature Link
Author	Herrera, Juan Carlos Romero, Juan Vicente Camayo, Gloria Cecilia Caeta, Creuci Maria Cortina, Hernando Alfonso
Copyright Year	2012
Abstract	Interspecific hybrids involving the cultivated C. arabica (2n = 4x = 44, E$^{a}$E$^{a}$C$^{a}$C$^{a}$) and two related diploid species (2n = 2x = 22), C. eugenioides (EE) and C. liberica (LL), were produced and analyzed for their relative genome affinity using different complementary approaches, including chromosome association analysis, genomic in situ hybridization (GISH) and pollen fertility. The mean arm pairing frequency (c) and the relative affinity index (x) of triploid hybrids with known genome combinations were used as a measure of chromosome homology. Triploid hybrids were highly sterile as a result of meiotic abnormalities (fertility ranged from 1 to 15 %). Nevertheless, all hybrids exhibited a significant occurrence of genome affinities (x = 0.96 for E$^{a}$C$^{a}$E and 0.81 for E$^{a}$C$^{a}$L). Further analysis using the GISH approach revealed that C. eugenioides was more closely related to C. arabica than to C. liberica, which was in agreement with the ancestral history of the allotetraploid C. arabica. The absence of incompatibility barriers at the stylar level in the flowers of the triploid hybrids indicates the possibility of desirable gene transfer through breeding strategies.
Starting Page	207
Ending Page	217
Page Count	11
File Format	PDF
ISSN	19359756
Journal	Tropical Plant Biology
Volume Number	5
Issue Number	3
e-ISSN	19359764
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-06-08
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coffea Genome affinities Interspecific hybrids GISH Meiotic behavior Pollen-style compatibility Transgenics Plant Breeding/Biotechnology Plant Ecology Plant Genetics & Genomics Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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