Polyploidy in Fruit Tree Crops of the Genus Annona (Annonaceae)

Frontiers in Plant Science
Carolina MartinJosé I Hormaza

Abstract

Genome duplication or polyploidy is one of the main factors of speciation in plants. It is especially frequent in hybrids and very valuable in many crops. The genus Annona belongs to the Annonaceae, a family that includes several fruit tree crops, such as cherimoya (Annona cherimola), sugar apple (Annona squamosa), their hybrid atemoya (A. cherimola × A. squamosa) or pawpaw (Asimina triloba). In this work, genome content was evaluated in several Annona species, A. triloba and atemoya. Surprisingly, while the hybrid atemoya has been reported as diploid, flow cytometry analysis of a progeny obtained from an interspecific cross between A. cherimola and A. squamosa showed an unusual ploidy variability that was also confirmed karyotype analysis. While the progeny from intraspecific crosses of A. cherimola showed polyploid genotypes that ranged from 2.5 to 33%, the hybrid atemoyas from the interspecific cross showed 35% of triploids from a total of 186 genotypes analyzed. With the aim of understanding the possible implications of the production of non-reduced gametes, pollen performance, pollen size and frequency distribution of pollen grains was quantified in the progeny of this cross and the parents. A large polymorphism in pollen ...Continue Reading

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Citations

May 5, 2020·Genome Génome / Conseil National De Recherches Canada·Egizia Falistocco, Nicoletta Ferradini
Nov 24, 2020·Frontiers in Plant Science·Marta RuizRaphaël Morillon

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Datasets Mentioned

BETA
KF010995

Methods Mentioned

BETA
Flow
Flow cytometry
genotyping
PCR
electrophoresis

Software Mentioned

Image J
SPSS

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