List

Abstract

molecule-typography-hd-wallpaper-1920x1080-9815

A set of 134 SSR markers with high polymorphism covering the 17 linkage groups of pear were selected to study the genetic variability and relationships of 99 P. pyrifolia cultivars. A total of 660 allelic variants were detected, with the number of observed alleles per locus varying from 3 to 9, with a mean of 4.93 alleles per locus. Among 81 SSR markers newly developed from the pear genome, the highest polymorphism was obtained by the motif (GT/CA), and the least polymorphism generated by (AC/TG). Clustering relationships of 99 P. pyrifolia cultivars generally reflected geographical classification, and further confirmed the close relationship between pears from Yangtze River Basin and Japan. The results also indicated that Sichuan province played an important role in pear resource distribution. Genetic structure analysis revealed the similar relationship as clustering, indicating the close relationships between Japanese and Chinese pear; and further proved more genetic exchange among cultivars from Japan and Zhejiang, and fewer genetic exchange among cultivars from Yunnan, Hubei and Sichuan. CoreS1, a core collection of P. pyrifolia newly constructed by the preferred sampling strategy, included 24 cultivars, retained 95.74% observed number of alleles (Na) of the 99 P. pyrifolia cultivars. Principal component analysis (PCA) further supported the representative genetic diversity of CoreS1 for P. pyrifolia cultivars from China, Japan, and Korea. The high quality and comprehensive evaluation of P. pyrifolia cultivars by the SSR markers covering the whole genome demonstrates their potential application in genetic diversity, genetic relationship, and core collection research on other germplasm resources of pear.

Keywords

  • Pear (P. pyrifolia);
  • SSR markers;
  • Genetic diversity;
  • Core collection

  Posts

Ocak 28th, 2014

You think water moves fast? You should see ice

In WordPress version 2.9, a new filter was added to make changing the string in the excerpt. Do not use both of these methods in the same WordPress installation. Use the one appropriate for your WordPress version.

Nisan 11th, 2017

frfrefrf

refewfewfewewfwfefr

Nisan 6th, 2017

Gıdalarda Temel İşlemler I

GIDALARDA TEMEL İŞLEMLER I

Nisan 4th, 2017

blog 1

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut […]

Nisan 4th, 2017

blog 4

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut […]

Nisan 4th, 2017

blog 3

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut […]

Nisan 4th, 2017

blog 2

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut […]

Nisan 4th, 2017

blog 1

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut […]

Nisan 3rd, 2017

Hello world!

Welcome to WordPress. This is your first post. Edit or delete it, then start writing!

Ocak 28th, 2014

The hidden benefits of gossip, ostracism

Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat […]

Ocak 28th, 2014

Rust Belt gentrification and how it hurts the poor

Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat […]