Identification Of Quantitative Trait Loci Associated With Fruit Quality Traits In Pear

Genetic map based quantitative trait loci (QTL) analysis is the main method for pear fruit traits research. To accelerate molecular breeding of fruit traits in pear, we analyzed QTL of ten pear fruit traits based on genetic map constructed in 2017. A total of 90 fruiting-age F-1 seedlings derived from Pyrus communis (L.) 'Red Clapp's Favorite' x Pyrus pyrifolia Nakai 'Mansoo' were used for QTL analysis. Candidate genes were screened in the regions of the pear genome sequence corresponding to the QTL. The study identified 56, 421, 139, 64, 59, 37 and 66 candidate genes related to single fruit weight, skin color, fruit core size, fruit diameter, soluble solid content, flesh firmness, and fruit length, respectively, from the pear genome database. Based on the high-density genetic map, ten QTL for the ten traits were identified. The QTL were located on linkage group 11 (LG 11), LG 3, LG 5 and LG 12, respectively. Genetic map based QTL analysis is the primary method for pear fruit traits research. Candidate genes were screened, the fruit traits of F-1 population were measured and ten QTL for the 10 traits were detected. (C) 2020 Friends Science Publishers