Genetic analysis of yield and quality in perennial ryegras Lolium perenne L.) by Aliaschraf Jafari

Cover of: Genetic analysis of yield and quality in perennial ryegras Lolium perenne L.) | Aliaschraf Jafari

Published by University College Dublin in Dublin .

Written in English

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  • Ryegrasses -- Analysis.,
  • Ryegrasses -- Genetics.,
  • Ryegrasses -- Quality.,
  • Ryegrasses -- Yields.

Edition Notes

Book details

Statementby Aliaschraf Jafari.
ContributionsUniversity College Dublin. Department of Crop Science, Horticulture and Forestry.
The Physical Object
Pagination200p. :
Number of Pages200
ID Numbers
Open LibraryOL18155551M

Download Genetic analysis of yield and quality in perennial ryegras Lolium perenne L.)

JAFARI ETAL.: GENETIC ANALYSIS OF YIELD AND QUALITY OF RYEGRASS tive of this work was to study the genetic control of dry matter yield, digestible or ganic matter in the dry matter (DOMD), WSC and CP and the genetic correlations among these traits using partially inbred full-sib families of perennial ryegrass (Lolium perenne).

Perennial ryegrass (Lolium perenne L.) is by far the most widely sown grass species in Ireland. Genotype × environment (G × E) interactions are a frequent occurrence in herbage yield evaluations. Jafari A, Connolly V, Walsh EJ () Genetic analysis of yield and quality in full-sib families of perennial ryegrass (Lolium perenne L.) under two cutting managements.

Ir J Agric Food Res Cited by: 2. Perennial ryegrass as a model grass Perennial ryegrass (Lolium perenne L.) is a temperate (cool-season) perennial grass. It is sown as a perennial forage and turf grass noted for fast establishment, exceptional quality, and high cool-season productivity.

Adapted to mild and wet climates, it is native toAuthor: Javier Do Canto Fagundez. Perennial ryegrass (Lolium perenne) forms the basis of grassland production in temperate pastures and is globally one of the most important forage grasses.

Consequently, there has been large plant breeding industry investment over the past 40 years in producing new varieties and independent testing systems designed to identify and list those with the most improved by: Genetic origins of perennial ryegrass (Lolium perenne) for New Zealand pastures Alan V Stewart PGG-Wrightson, PO BoxChristchurch [email protected] Abstract.

New Zealand perennial ryegrass germplasm originated largely from seed introduced from the UK during the s. Modern breeding began in the s and. Genetic analysis of yield and quality in full sib families of perennial ryegrass (Lolium perenne L.) under two cutting managements.

Irish Journal of Agricultural and Food Resea – Cited by: study, perennial ryegrass (Lolium perenne L.) seeds were collected from Black Sea Coastal Region in Then, 18 lines were obtained using half sib family selection breeding method.

Yield experiment was established in The aim of the present research was to determine forage yield and quality of perennial ryegrass by: 4. In this project, SI in perennial ryegrass (Lolium perenne L.) is studied at the gene level for the S-locus.

Using a fine-mapping approach, large perennial ryegrass mapping populations were genotyped using High Resolution Melting (HRM) method in order to isolate a small genomic region of cM. The genomic S-region was sequenced in order. Perennial ryegrass (Lolium perenne L.) is the principal source of nutrition for ruminant animals grazed in pastoral agricultural systems in temperate regions of the world, including New ss is an obligately outbreeding perennial plant species, adapted and bred as heterogeneous populations of heterozygous individuals.

This study is the most comprehensive analysis to date of qualitative disease resistance candidate genes in perennial ryegrass. SNPs identified within candidate genes provide a valuable resource for mapping in various ryegrass pair cross-derived populations and further germplasm analysis using association by: Perennial ryegrass is an important pasture grass in temperate regions.

As a forage biomass-generating species, plant architecture-related characters provide key objectives for breeding improvement. In silico comparative genomics analysis predicted colocation between a previously identified QTL for plant type (erect versus prostrate growth) and the ortholocus of the rice OsABCG5 gene (Cited by: 5.

Quantitative trait loci (QTLs) for a number of agronomically important traits of perennial ryegrass (Lolium perenne L.) were identified by means of a reference molecular marker-based genetic map. associated markers in other genetic backgrounds and environments. Introduction Seed yield is an important factor in the commercial success of perennial ryegrass (Lolium perenne L.) cultivars.

However, seed yield can be unreliable (Elgersma ), depending on season, location and cultivar, and its improvement through artificial.

Multitrait response to selection in Lolium perenne L. (perennial ryegrass) populations. Abstract. Genetic variation for growth, quality and persistency characteristics was assessed in six breeding populations of perennial ryegrass.

Response to multitrait selection was predicted in each population using a selection index based on 10 by: genetic map. An enhanced molecular marker-based genetic linkage map of perennial ryegrass (Lolium perenne L.) has recently been constructed through the activities of the International Lolium Genome Initiative (ILGI), using the p/ one-way pseudo Cited by: 3.

Jafari A, Connolly V, Walsh EJ () Genetic analysis of yield and quality in full-sib families of perennial ryegrass (Lolium perenne L.) under two cutting managements.

Irish Journal of Agricultural and Food Resea –Cited by:   Genetic differentiation among perennial ryegrass populations was studied using multivariate procedures incorporating a broad range of seasonal growth, quality and persistency by:   INTRODUCTION. Perennial ryegrass (Lolium perenne L.) is an important component species in pastoral-based production systems in temperate is diploid (2n) with seven chromosomes and has a genome size of approx.

25 Gb (Kopecky et al., ).Despite its relative importance, it remains poorer in genome-based resources than other grass species, such as Cited by:   Ryegrass (Lolium sp.) Is a major weed problem in wheat production. Diclofop is a chemical that can kill seedlings of annual grasses, including ryegrass, but will not injure wheat.

When a weed population is repeatedly exposed to the same herbicide, survivors from each spray will event will eventually produce plants that will not be killed by the recommended herbicide dose. Jafari AA, Connolly V, Walsh EK () Genetic analysis of yield and quality in full-sib families of perennial ryegrass (Lolium perenne L.) under two cutting managements.

Irish Journal of Agricultural and Food Resea –Cited by: 5. Ryegrass cultivars form the basis of grassland production in Ireland and the UK. In Ireland, perennial ryegrass (Lolium perenne) is the dominant ryegrass species followed by Italian ryegrass (Lolium multiflorum Lam.) and Hybrid ryegrass (Lolium × boucheanum Kunth).

Such cultivars are selected for their high dry matter (DM) yield throughout the by: 4. Turkish Journal of Field Crops19(2), MORPHOLOGICAL AND AGRONOMIC CHARACTERISTICS OF PERENNIAL RYEGRASS (Lolium perenne L.) GENOTYPES Abdullah OZKOSE*1, Ahmet TAMKOC1 1Selcuk University, Faculty of Agriculture, Department of Field Crops, TURKEY *Corresponding author: [email protected] Received: Cited by: 2.

Perennial ryegrass (Lolium perenne) is one of the major species present in temperate grasslands and its use as forage is essential for the sustainable diets of grazing animals which impact dairy and meat uently, there is a large interest in breeding new varieties of ryegrass with improved yield, quality and disease resistance, but also improved downstream effects in meat Author: Alexandre Foito, Alexandre Foito, Christine Anne Hackett, Derek Stewart, Derek Stewart, Janaki Velmu.

In this study, meta-analysis of QTL architecture in perennial ryegrass has permitted evaluation of the range of typical genetic effects across a range of biological trait categories. Additionally, MQTL analysis identified two consensus QTLs for pathogen resistance, as well as putatively linked functional by: ().

Forage quality of plant parts of perennial grasses and relationship to phenology. Genetic Analysis of Yield and Quality in Perennial Ryegrass (Lolium perenne L.)”, PhD thesis, (). Genomic selection for crop improvement. ().Author: P. Conaghan and M.D.

Casler. Abstract. Lolium perenne L. (perennial ryegrass) is globally one of the most important forage and grassland crops.

We sequenced the chloroplast (cp) genome of Lolium perenne cultivar Cashel. The L. perenne cp genome is bp with a typical quadripartite structure. It contains genes for 76 unique proteins, 30 tRNAs and four rRNAs.

As in other grasses, the genes accD, ycf1 and ycf2 Cited by: The MQTLs identified in the previous studies provide primary targets for fine-structure mapping and gene identification activities [ 24, 25 ]. As the number of published trait-dissection studies has increased for perennial ryegrass, so this species has become a viable target for QTL by: Molecular Genetics of Abiotic Stress Tolerance in Perennial Ryegrass (Lolium perenne L.) Allison Pearson Bachelor of Biotechnology and Cell Biology (Hons.) A thesis submitted to La Trobe University in total fulfilment of Biology and agronomy of perennial ryegrass (Lolium perenne L.) Download PDF Drylander perennial ryegrass produces good early growth from autumn through to spring.

Drylander is well adapted to Australian conditions. It survives drought and is able to withstand a period of several hot dry months under an annual rainfall of +mm. Drylander seed is produced and harvested only from dryland production seed crops to [ ].

Relation between seed yield potential and turf quality in Poa pratensis L. Susanne Barth, TEAGASC Variation in seed yield and other morphological traits in a collection of Irish Lolium perenne ecotypes and bred varieties Bruno Studer, DJF Genetic characterisation of seed yield and its components in perennial ryegrass.

Input Data Analysis. The genetic linkage map based on single-nucleotide polymorphisms of expressed perennial ryegrass genes (Studer et al., ) served as a marker scaffold for the this study, a total of gene-derived markers (between 79 and on each LG, on average) have been located on the genetic linkage length of the marker-containing.

Background: Perennial ryegrass (Lolium perenne L.) is an important pasture and turf crop. Biotechniques such as gene expression studies are being employed to improve traits in this temperate grass. Quantitative reverse transcription-polymerase chain reaction (qRT-PCR) is among the best methods available for determining changes in gene by: Genetic analysis of production characters in Lolium Triple test cross analysis of spaced plant performance M.J.

Kearsey 1, M. Hayward 2, F. Devey 1, S. Arcioni 2, M. Eggleston 1 and M. Eissa 4 t Department of Genetics, University of Birmingham, Birmingham B15 2TI', UK 2 Welsh Plant Breeding Station, Plas Gogerddan, Aberystwyth SY Additional File 5 Major protein sequence motifs in predicted Lolium NBS domains.

a Motifs listed in the order of occurrence in the NBS domain of putative perennial ryegrass R genes. Perennial ryegrass motifs were named in accordance with descriptions obtained from both rice and A. thaliana [30,31,66]; b Bioinformatic analysis using Pfam on putative R gene sequences identified all to be CC-NBS Cited by: Abstract.

Perennial ryegrass (Lolium perenne L.) is one of the most widely grown forage grasses in temperate agriculture. In order to maintain and increase its usage as forage in livestock agriculture, there is a continued need for improvement in biomass yield, quality, disease resistance and seed yield.

The first genetic map for perennial ryegrass was based on such a population (p) derived from the cross between a L. perenne × L. multiflorum interspecific hybrid and an ar-tificial homozygote produced by anther culture (Hayward et al.).

The map contains loci, of which, 34 are restriction fragment length polymorphisms (RFLPs Cited by: Perennial ryegrass (Lolium perenne L.) is one of the most cultivated forage species in temperate grasslands, mainly farmed for its re-growth capacity after defoliation, and for the high value as feed for ruminants, due to palat-ability, digestibility, and nutritive contents [1–3].

Peren-nial ryegrass is an obligate allogamous species withCited by: The importance of haploid and doubled haploid (DH) techniques for basic and applied research, as well as to improve the speed of genetic gain when applied in breeding programs, cannot be overstated.

They have become routine tools in several major crop species, such as maize (Zea mays L.), wheat (Triticum aestivum L.), and barley (Hordeum vulgare L.). DH techniques in perennial ryegrass (Lolium Cited by: 4. In summary, molecular marker analysis has for the first time defined the genetic map location of a major locus or loci for resistance to crown rust in perennial ryegrass.

It is proposed that this locus is designated LpPc1 (Lolium perenne Puccinia coronata resistance 1).Cited by:. The unambiguous identification of individual chromosomes is a key part of the genomic characterization of any species.

In this respect, the development and application of chromosome banding techniques has revolutionised mammalian and especially, human genomics. However, partly because of the traditional use of chromosome squash preparations, consistent fluorescence banding has rarely Cited by: 1.The isolation, molecular characterization, functional analysis, and phylogenetic relationships of genes encoding FTs, FEHs, and INVs from temperate grasses are reviewed, with an emphasis on perennial ryegrass (Lolium perenne L.).

The roles these enzymes play in fructan accumulation and remobilization, and future biotechnological applications in.PPP for pre-breeding in perennial ryegrass – Phase II, call a) 5 associations between genetic profiles of the cultivars and phenotypic traits will be studied (see WP 10 for detail).

All results obtained in the field trials will be analysed and prepared for publication.

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