Genome-wide markers for seed yield and disease resistance in perennial ryegrass  

作　　者：Kristina Jaškune Vilma Kemešyte Andrius Aleliūnas Grazina Statkeviciute 

机构地区：[1]Institute of Agriculture,Lithuanian Research Centre for Agriculture and Forestry(LAMMC),Instituto av.1,Akademija LT-58344,Lithuania

出　　处：《The Crop Journal》2022年第2期508-514,共7页作物学报（英文版）

基　　金：the framework of the long-term research program"Genetic determination of the traits of agricultural and forest plants,development of modern cultivars"and"Genome-wide functional analysis of perennial ryegrass for improved growth under water limiting conditions(Grow Gene)"project funded by the Research Council of Lithuania(S-MIP-17-24)。

摘　　要：The market success of perennial ryegrass(Lolium perenne L.) cultivars depends on sufficient seed production, as they are propagated by seed. However, breeding for high quality forage production reduces seed yield, and breaking the negative correlation would help to overcome the problem. The foliar disease crown rust is another factor affecting reproductive capacity and thereby seed yield. We evaluated seed yield-related traits and resistance to crown rust in a collection of commercial cultivars and ecotypes of perennial ryegrass and identified genome-wide markers associated with the traits. The study revealed high variation between the ecotype and cultivar groups as well as between years. A genome-wide association study identified 17 DNA single-nucleotide polymorphisms(SNPs) of which eight were associated with crown rust and nine with flag-leaf length. The SNP markers were located within or near predicted genes functioning in defense against pathogens. The identified genes are strong candidates for a further in-depth functional study to continue unravel determination of leaf architecture and crown rust resistance in perennial ryegrass.

关 键 词：Crown rust Puccinia coronata f.sp.lolli Flag-leaf length Genome-wide association study(GWAS) Seed yield Lolium perenne L. 

分 类 号：S543.6[农业科学—作物学]