Molecular Markers and a Quality Trait Evaluation for Assessing the Genetic Diversity of Avocado Landraces from China

Yuanzheng Liu, Yu Ge, Rulin Zhan, Xinge Lin, Xiaoping Zang, Yanxia Li, Ying Yang and Weihong Ma
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Yuanzheng Liu: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
Yu Ge: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
Rulin Zhan: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
Xinge Lin: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
Xiaoping Zang: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
Yanxia Li: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
Ying Yang: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
Weihong Ma: Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China

Agriculture, 2020, vol. 10, issue 4, 1-11

Abstract: Avocado is an economically important crop that is widely cultivated in the tropical and subtropical regions of China. However, there is a lack of sufficient information regarding the racial origins and genetic diversification of native avocado germplasm. On the basis of a race-specific kompetitive allele-specific PCR genotyping analysis, the 56 avocado accessions examined in this study were classified as complex hybrids, namely Guatemalan × Mexican × West Indian hybrids. The genetic relationships among the avocado accessions were assessed based on a quality trait evaluation and molecular characterization. The total flavonoid content was relatively useful for differentiating between native avocado accessions. A cluster analysis as well as principal component and coordinate analyses of quality traits and molecular characteristics differentiated the avocado accessions, but not according to geographical origins. Thus, the artificial flow of avocado germplasm or seed exchanges among farmers within specific regions may have contributed to the similar genetic backgrounds of avocado germplasm from different collections.

Keywords: Persea americana; phenotypic trait; EST-SSR marker; genetic relationship (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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