Abstract
Plastome-genome incompatibility (PGI) is prevalent in several plants including the Zantedeschia species, a worldwide commercial flower crop native to South Africa. Generally, hybrids suffering from PGI appear less vigorous and more susceptible than normal plants. Previous reports revealed that the PGI level in interspecific hybrids is correlated with the relatedness of the parental species in the genus Zantedeschia. To provide a basis for utilizing and improving resources in breeding programs, a total of 117 accessions of colored calla lily (Zantedeschia hybrid), collected from New Zealand, the Netherlands and the United States, were genotyped using 31 transferable expressed sequence tags-simple sequence repeats (EST-SSR) markers from the white calla lily (Zantedeschia aethiopica). A moderately high level of genetic diversity was observed, with 111 alleles in total, an observed/expected heterozygosity (Ho/He) of 0.453/0.478, and polymorphism information content (PIC) of 0.26. Genetic distance and STRUCTURE-based analysis further clustered all accessions into four subgroups (G-Ia, G-Ib, G-IIa and G-IIb), which mostly consisted of Zantedeschia pentlandii, Zantedeschia elliotiana, Zantedeschia albomaculata and Zantedeschia rehmannii, respectively. Significant genetic differentiation was observed between all inferred subgroup pairs, with the Fst ranging from 0.142 to 0.281. Finally, the accessions assigned into G-IIb (Z. rehmannii) were recommended as top priority parents in efficient Zantedeschia breeding program designs.
Highlights
The Zantedeschia species of the genus Zantedeschia in the family Araceae is a herbaceous perennial flower plant native to the swampy or mountainous regions of South Africa [1,2]
Per 7.27 kb) in the present study was comparable to that found in Z. aethiopica, but lower than that reported in Z. rehmannii
(95, 65.07%), followed by Phoenix dactylifera (6, 4.11%), Nelumbo nucifera (5, 3.42%), Musa acuminata subsp. malaccensis (5, 3.42%), Elaeis guineensis (4, 2.74%) and others (31, 21.23%). These results suggested that Z. aethiopica and A. amnicola, both of which belong to the family Araceae, are more closely related to each other in species-genome structure and evolution
Summary
The Zantedeschia species of the genus Zantedeschia in the family Araceae is a herbaceous perennial flower plant native to the swampy or mountainous regions of South Africa [1,2]. Due to its extraordinary flower spathe (outer “petal” shaped like a funnel) and decorative leaves, the Zantedeschia spp. are popular bulb flower crops worldwide. Genes 2017, 8, 168 sections: the Zantedeschia section (white calla lily) and Aestivea section (colored calla lily). Zantedeschia odorata Perry.) with a white spathe and rhizome storage organs, while the latter contains six species Referred to as Zantedeschia hybrids, are interspecies hybrids, mainly derived from Z. elliotiana, Z. pentlandii, Z. albomaculata and Z. rehmannii within the Aestivea section [5] In conventional interspecific hybridization between the two sections, hybrids cannot be generated and developed because of endosperm degeneration, abnormal embryo growth and arrested plastid development, which is a known effect of plastome-genome incompatibility (PGI) [4].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
