U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

Genetic diversity of Malus cultivars and wild relatives in the Chinese National Repository of Apple Germplasm Resources

Author:
Yuan Gao, Fengzhi Liu, Kun Wang, Dajiang Wang, Xin Gong, Lijun Liu, Christopher M. Richards, Adam D. Henk, Gayle M. Volk
Source:
Tree genetics & genomes 2015 v.11 no.5 pp. 106
ISSN:
1614-2942
Subject:
Malus baccata, USSR, Malus domestica, Malus prunifolia, Malus sieversii, apples, breeding, cultivars, genetic variation, germplasm, landraces, microsatellite repeats, wild relatives, China, Japan, North America, Western European region
Abstract:
The Research Institute of Pomology (IP), Chinese Academy of Agricultural Sciences (CAAS) in Xingcheng, China, maintains hundreds of apple accessions that originated from around the world. We have used 16 microsatellites to assess the diversity and differentiation of 391 accessions within the IP that represent Malus × domestica (from China, Japan, former Soviet Republics, and Western countries) as well as the crop’s wild relative species Malus baccata, Malus prunifolia, Malus × robusta, and Malus sieversii. We identified genetic relationships among these eight source categories that suggest that the M. × domestica cultivars from the former Soviet Republics are most closely related to M. sieversii and may represent an independent lineage of domesticated apples distinct from those found in Western Europe and North America. We show that the M. × domestica cultivars from China and Western sources are genetically similar, whereas the cultivars from Japan are distinct. We also describe two accessions of M. × domestica ssp. chinensis landraces that are believed to be over 2000 years old and are more similar to wild species than are most of the M. × domestica cultivars. We show that the wild, landrace, and cultivar accessions within the IP offer novel diversity to apple breeding programs.
Agid:
62431
Handle:
10113/62431