Abstract
Lycium species (goji), belonging to Solanaceae, are widely spread in the arid to semiarid environments of Eurasia, Africa, North and South America, among which most species have affinal drug and diet functions, resulting in their potential to be a superior healthy food. However, compared with other crop species, scientific research on breeding Lycium species lags behind. This review systematically introduces the present germplasm resources, cytological examination and molecular-assisted breeding progress in Lycium species. Introduction of the distribution of Lycium species around the world could facilitate germplasm collection for breeding. Karyotypes of different species could provide a feasibility analysis of fertility between species. The introduction of mapping technology has discussed strategies for quantitative trait locus (QTL) mapping in Lycium species according to different kinds of traits. Moreover, to extend the number of traits and standardize the protocols of trait detection, we also provide 1,145 potential traits (275 agronomic and 870 metabolic) in different organs based on different reference studies on Lycium, tomato and other Solanaceae species. Finally, perspectives on goji breeding research are discussed and concluded. This review will provide breeders with new insights into breeding Lycium species.
Highlights
Goji, the general name of the plants in the genus Lycium, are members of the Solanaceae family found in arid to semiarid regions of Eurasia, Africa, and North and South America
Genome-wide association study (GWAS) is an analytical method based on linkage disequilibrium of genes or loci among biological populations, combining genotype and phenotypic data from mapping populations and analyzing the relationship between detection markers or loci and traits using statistical methods (Yu and Buckler, 2006)
We obtained an F2 population with male sterility segregation that can be used for quantitative trait locus (QTL) mapping, and we discovered that male sterility is regulated by a single recessive gene
Summary
The general name of the plants in the genus Lycium, are members of the Solanaceae family found in arid to semiarid regions of Eurasia, Africa, and North and South America. The procedure of MAS combined with next-generation sequencing (NGS) breeding mainly includes genetic population construction, morphological trait detection, population sequencing and genotyping, statistical analysis between markers, and QTL/association mapping.
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