Pyrus x bretschneideri Assembly. Pyrus x bretschneideri

Chromosomal level reference genome provides crucial foundation for genomics researches such as genome-wide association studies (GWAS) and whole genome selection (WGS). Both the European (P. communis) and Chinese pear (P. bretschneideri) genomes published so far are in scaffolds level. To help anchoring P. bretschneideri 'DangshanSuli' v1.0 genome of 2103 scaffolds into pseudo-chromosomes, two genetic maps (MH and YM maps) were constructed using half sibling populations of Chinese pear crosses, ‘Mantianhong’ (MTH) × ‘Hongxiangsu’ (HXS) and ‘Yuluxiang’ (YLX) × MTH using genotyping-by-sequencing (GBS) technology. By integrating two new maps with the previously published ‘Bayuehong’ x ‘Dangshansuli’ map, we constructed ‘Dangshansuli’ reference genome v1.1 on chromosome level. This provides an essential foundation for pear genetics and genomics research and molecular breeding.