PPP for pre-breeding in perennial ryegrass (Lolium perenne L.) Petter Marum Graminor AS
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1 PPP for pre-breeding in perennial ryegrass (Lolium perenne L.) Petter Marum Graminor AS
2 Project partners DLF (Niels Christian Nielsen) Lantmännen (Christer Persson) Graminor (Petter Marum) Boreal (Miko Isolathi) Agricultural University of Iceland (Aslaug Hegadottir) Norwegian University of Life Sciences (UMB) (Odd Arne Rognli) Univeristy of Aarhus (Torben Asp) Jõgeva Plant Breeding Institute (Rene Aavola)
3 Pre-breeding program The aim of this pre-breeding program is to identify and select new plant materials for development of cultivars with a suitable adaption to future climates The pre-breeding program is a continuous and long-term activity
4 Pre-Breeding In Situ Genebank (Ex Situ) Plant breeding research Pre-breeding Cultivar development Official variety testing DUS Seed Companies Farmers
5 Perennial ryegrass Lolium perenne L. The main forage grass species in Denmark and south-wards in Europe Important in southern Sweden and parts of southwestern Norway Superior feed quality and productivity under frequent cutting regimes Is expected to expand further north due to milder winters with shorter periods of snow cover
6 Perennial ryegrass Lolium perenne L. The main weaknesses are: Susceptibility to low-temperature pathogens Inadequate growth cessation in autumn to allow for sufficient cold hardening. Can deharden too early with increased risk of frost injury in spring
7 Perennial ryegrass Lolium perenne L. Show local adaption to temperature and photoperiod (like all forage grasses) The photoperiod does not change with climate change that cause the temperature to rise. This raises the need for new ideotypes with a different set of physiological traits than the present cultivars.
8 Perennial ryegrass Lolium perenne L. Important questions are then: Is the available germplasm and active breeding populations sufficiently broad Or should new exotic materials be identified and recombined with existing material to serve as the new genetic resources for development of new cultivars
9 Project budget Total cost is DKK Companies DKK (50%) NMR DKK (50%)
10 Project outline
11 Work packages WP1 WP2 WP3 WP4 WP5 WP6 Locating and requesting Lolium Perenne L. accessions and cultivars Multiplication of gene bank accessions for further testing Testing the potential winter hardiness of existing perennial ryegrass cultivars Phenotyping of gene bank accessions Establishing a broad breeding population (Base broadening) Genetic diversity analyses and trait/marker associations
12 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP7 WP WP8 WP WP
13 WP1 Locating and requesting Lolium Perenne L. accessions and cultivars Responsible: DLF, (Graminor) Participating: DLF, Graminor, (NordGen) Timeframe: 2012
14 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP WP
15 WP1 The aim was to acquire 400 accessions for WP2, WP4, WP5 and WP6 Received about commercial cultivars with very good winter hardiness for WP3 Ended up with 22 cultivars
16 WP2 Multiplication of gene bank accessions for further testing Responsible: DLF Participating: DLF Timeframe:
17 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP WP
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20 WP3 Testing the potential winter hardiness of existing perennial ryegrass cultivars Responsible: Agricultural University of Iceland (AUI) Participating: AUI, Lantmännen, Graminor, Boreal, and Jõgeva Timeframe:
21 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP WP
22 Cultivars in WP3 Cultivar Ploidy Country Premium 2n CH Arvicola 2n CH Cavia 2n CH Ivana 2n D Pionero 4n D SW Irene 2n S SW Birger 4n S SW Leia 4n S SW Svea 2n S SW Gunne 2n S Riikka 2n FI Raidi 2n EST Raite 4n EST Faherlin 2n N Spdidola 2n LV Arvella 2n CH Salamandra 4n CH Norlea 2n CAN Falk 4n N Einar 4n N Trygve 4n N Fjaler 4n N
23 WP4 Phenotyping of gene bank accessions Responsible: Lantmännen Participating: Lantmännen, DLF, Graminor, and Boral Timeframe:
24 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP WP
25 WP4 Observations will be done on 20 plants per accession 5 plants x 4 reps x 400 acc. Important traits Winter survival Spring growth Growth habit Plant height Disease attack Crown rust
26 WP4 Phenotyping will be divided between participants Crown rust is most frequent in Denmark Winter damage most severe in Norway and Finland Data will be used in WP10 (next phase ) Establish marker-trait associations
27 Establishing a broad breeding population (Base broadening) Responsible: Graminor Participating: Graminor and DLF Timeframe: WP5 WP5
28 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP7 WP WP8 WP WP
29 WP5 Two crossing blocks Norway Denmark 10 plants per accession Recombined in two generations Harvest one seed head form each plant and use it to establish one new plant for production of second generation (SSD) Basis for pre-breeding work with a time-frame of years or more. Develop site specific populations by natural selection
30 WP6 Genetic diversity analyses and trait/marker associations Responsible: UMB Participating: UMB and University of Aarhus Timeframe:
31 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP7 WP WP8 WP WP
32 WP6 Genotype the accessions using a suitable marker system Preferably SNPs Estimate the genetic distance between the accessions Establish marker-trait associations (WP10 next phase)
33 Pre-breeding in perennial ryegrass (Lolium perenne L.) WP1 Requesting seed WP2 WP3 WP4 Seed multiplication Cultivar trials Phenotyping Broad breeding population Genotyping, diversity WP5 WP N, DK DK N, S, IS FIN, EE N, DK, S, FIN N, DK WP7 WP WP8 WP WP
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