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Genes 2017, 8(6), 168; doi:10.3390/genes8060168

Assessing Genetic Diversity and Population Differentiation of Colored Calla Lily (Zantedeschia Hybrid) for an Efficient Breeding Program

1
Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Sciences; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture; Key Laboratory of Urban Agriculture, Ministry of Agriculture, Beijing 100097, China
2
Beijing Institute of Landscape and Garden, Beijing 100102, China
3
College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, Qinhuangdao 066600, China
4
Beijing Research Centre of Intelligent Equipment for Agriculture, Beijing 100097, China
*
Author to whom correspondence should be addressed.
Academic Editor: Aureliano Bombarely
Received: 20 April 2017 / Revised: 13 June 2017 / Accepted: 14 June 2017 / Published: 21 June 2017
(This article belongs to the Section Plant Genetics and Genomics)
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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. View Full-Text
Keywords: Zantedeschia species; white calla lily; colored calla lily; EST-SSRs; genetic diversity; population differentiation Zantedeschia species; white calla lily; colored calla lily; EST-SSRs; genetic diversity; population differentiation
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Wei, Z.; Zhang, H.; Wang, Y.; Li, Y.; Xiong, M.; Wang, X.; Zhou, D. Assessing Genetic Diversity and Population Differentiation of Colored Calla Lily (Zantedeschia Hybrid) for an Efficient Breeding Program. Genes 2017, 8, 168.

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