Isozyme polymorphism in a collection of Spanish and French perennial ryegrass populations

Oliveira, J.A.; Balfourier, François; Charmet, G.; Arbones, E.

doi:10.1051/agro:19970604

Cited by 4 publications

(2 citation statements)

References 11 publications

(17 reference statements)

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“…Grass plants are generally long day plants and can flowering in very wide photoperiods (Açıkgöz, 1994;Avcıoğlu, 1997). Oliveira and Charmet (1989) found the between 6 May and 7 June in 50 perennial ryegrass population collected from North West Spain, while while Romani et al (2002) found 52 genotypes of perennial ryegrass (Lolium perenne) collected from different regions of Italy reported the heading date between 5 and 25 May. Also, Mirjalili and Bennet (2006), in their study in Iran, reported the average heading date of 11 perennial ryegrass lines to be 6 May.…”

Section: Days To Headingmentioning

confidence: 94%

Determination of Some Characteristics of Tall Fescue (Festuca arundinaceae Schreb.) Populations Collected from Natural Flora and Selection of Grass Type Genotypes

ALAY¹,

Ayan

2022

Turkish Journal of Range and Forage Science

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The aim of this study was to determine the identification criteria (phenological, morphological and some agricultural) and select the ones suitable for turfgrass. Agricultural studies in Black Sea Agricultural Research Institute Ambarköprü Station were carried out. Identification studies was done according to IBPGR with 900 genotypes in 2015 and 2016. Some parameters determined in the study as follows. Average plant height 65–177 cm, main stem thickness 2.0–6.1 mm, internode length 11–53 cm, flag leaf length 10–42 cm, flag leaf width 3–14 mm, days to heading 208–246, lodging ratio 1.5–5.0 (1=erect; 5= postrate), tillering potential 9–330, spring growth 1.5–5.0 (1- early; 5- late), fresh forage yield 101–2330 g/plant. End of the morphological and technological measuring and observations, 49 genotypes were selected for turfgrass with using relative rating method. According to the analysis, the genotypes were first divided into two main groups. It was determined that the genotypes FA 06-07, FA 31-02, FA 09-08 and FA 05-13 in the first group were collected from Samsun and Tokat locations, and all of the genotypes in the second group were collected from the Tokat location.

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Section: Days To Headingmentioning

confidence: 94%

Determination of Some Characteristics of Tall Fescue (Festuca arundinaceae Schreb.) Populations Collected from Natural Flora and Selection of Grass Type Genotypes

ALAY¹,

Ayan

2022

Turkish Journal of Range and Forage Science

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“…Genetic diversity studies of ryegrasses, using mainly morphological characteristics, were initially focused on natural populations, for the establishment of core collections of valuable gene bank materials and in order to assist understanding of processes of diversification in response to ecological factors (Hayward 1985, Prendes et al 1989, Charmet et al 1993, Fernando et al 1997, Oliveira et al 1997, Balfourier et al 1998. Following the development of molecular genetic marker systems, these technologies were applied to studies of the diversity of both non-domesticated and cultivated ryegrass germplasm (Stammers et al 1995, Huff 1997, Warpeha et al 1998, Rold an-Ruiz et al 2000, Cresswell et al 2001, Guthridge et al 2001, Ghariani et al 2003, Kubik et al 2001, Bolaric et al 2005a,b,c, van Treuren et al 2005, Wang et al 2009) in order to understand genetic relationships.…”

Section: Germplasm Resources and Genetic Diversitymentioning

confidence: 99%

Prospects for applications of genomic tools in registration testing and seed certification of ryegrass varieties

2016

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The ryegrass (Lolium) species, perennial ryegrass (Lolium perenne L.) and Italian ryegrass (Lolium multiflorum Lam.), are the two most important pasture grass species for global temperate regions and are also useful for amenity purposes. Due to an outbreeding reproductive habit, high levels of genetic heterogeneity are present within cultivated varieties. A continual increase in delivery of new cultivars to the marketplace, along with limited capacity to discriminate on the basis of morphological characteristics in a grow-out test, has caused difficulties for distinctness, uniformity and stability (DUS) testing in the current plant variety protection (PVP) system. A range of genomic tools and resources have been generated for ryegrasses, which provide new opportunities and challenges to the current PVP system. In this review, the currently available genomic tools and resources are described, along with prospects for applications to the PVP system and testing for seed certification and purity accreditation.

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Genetic diversity in perennial ryegrass and white clover among old Dutch grasslands as compared to cultivars and nature reserves

et al. 2004

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To support conservation policies for old Dutch grasslands that are still in agricultural use, morphological variation and AFLP-based (amplified fragment length polymorphism-based) genetic diversity was studied in perennial ryegrass and white clover populations and compared with the diversity in reference varieties. In addition, AFLP variation was also studied in grasslands located in nature reserves. From principal component analysis (PCA), it appeared that date of ear emergence in perennial ryegrass and characters related to plant vigour in white clover were the main morphological characters separating the reference varieties from the old Dutch grassland populations, and some of the grassland populations from each other. In both species, intrapopulation variation was lower for the reference varieties. Lower heterogeneity within the reference varieties was also found in the AFLP analysis. All common AFLP's observed in old Dutch grasslands could also be found in the reference varieties and nature reserves. Only a small number of low-frequency alleles found in old Dutch grasslands were absent from the other two groups. However, band frequencies of markers could vary considerably between populations, which may have been caused by selection. Analysis of the AFLP data by PCA distinguished the majority of reference varieties from the old Dutch grasslands, and showed genetic differentiation only between some grasslands. Comparison of old Dutch grasslands with grasslands in nature reserves indicated that basically the same range of genetic variation is covered by the two groups. Our study indicates that the Netherlands harbour a more or less continuous population for major parts of the diversity of perennial ryegrass and white clover. It was concluded that no specific conservation measures are presently needed to maintain genetic diversity of perennial ryegrass and white clover occurring in old Dutch grasslands.

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Isozyme polymorphism in a collection of Spanish and French perennial ryegrass populations

Cited by 4 publications

References 11 publications

Determination of Some Characteristics of Tall Fescue (Festuca arundinaceae Schreb.) Populations Collected from Natural Flora and Selection of Grass Type Genotypes

Determination of Some Characteristics of Tall Fescue (Festuca arundinaceae Schreb.) Populations Collected from Natural Flora and Selection of Grass Type Genotypes

Prospects for applications of genomic tools in registration testing and seed certification of ryegrass varieties

Genetic diversity in perennial ryegrass and white clover among old Dutch grasslands as compared to cultivars and nature reserves

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