Winterhardiness and Turf Quality of Accessions of Perennial Ryegrass (<i>Lolium perenne</i> L.) from Public Collections

Hulke, Brent S.; Watkins, Eric; Wyse, Donald L.; Ehlke, Nancy

doi:10.2135/cropsci2006.10.0671

Cited by 27 publications

(37 citation statements)

References 11 publications

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“…In our study, we chose accessions that were able to survive a test winter in Minnesota, which would reXect the type of accessions that are of interest to a breeding program in this region (Hulke et al 2007). Humphreys and Eagles (1988) and Tcacenco et al (1989) used freezing tolerance as the primary screening technique, and did not prescreen the accessions in a natural environment.…”

Section: Resultsmentioning

confidence: 99%

“…Accessions were chosen from a set of 300 accessions evaluated for winterhardiness over two winters in a central Minnesota Weld setting by Hulke et al (2007). They observed considerable phenotypic homogeneity within accessions, which is most likely due to the fact that these collections were obtained from isolated populations in which only a portion of the genetic variability was sampled.…”

Section: Methodsmentioning

confidence: 99%

“…The model speciWed minimum temperature as the only covariate with the alive/dead binomial data, since the position within the freezing chamber (replication eVect) was not signiWcant for any of the temperature treatments when the raw data were subjected to analysis of variance (Table 1) (Solid lines = air temperature, dotted lines = growth media temperature, dashed lines = the absolute value of the diVerence between air and growth media temperature.) (b) Graphical representation of the temperature program studied in the Weld by Hulke et al (2007). All correlation coeYcients were calculated using PROC CORR of SAS statistical software package version 9.1 (SAS Institute 2002).…”

Section: Methodsmentioning

confidence: 99%

“…Wild or landrace germplasm may be useful to quickly improve the range of winterhardiness in modern germplasm (Hulke et al 2007). To date, freezing tolerance studies of wild and landrace accessions of perennial ryegrass have been limited to collections in Europe, where LT 50 scores were shown to correlate with the winter climate conditions at the site of collection (r = 0.39, P < 0.001, Humphreys and Eagles 1988; r = 0.69, P < 0.01, Tcacenco et al 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Hulke et al (2007) studied Weld winterhardiness and turf traits of 300 wild and landrace accessions of perennial ryegrass from two public collections in the United States, and found accessions with winterhardiness exceeding that of the check variety 'NK200', which has consistently ranked high in Weld winterhardiness in the upper Midwest, USA. It is the purpose of this study to (i) estimate the freezing tolerance of landrace populations to provide useful information for breeding programs outside our region, (ii) determine if freezing tolerance is positively associated with Weld winterhardiness in this diverse, landrace germplasm, and (iii) determine if freezing tolerance is negatively associated with turf quality components, which would limit the use of freezing tolerance evaluations as a repeatable selection tool in a turfgrass breeding program.…”

Section: Introductionmentioning

confidence: 99%

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Freezing tolerance of selected perennial ryegrass (Lolium perenne L.) accessions and its association with field winterhardiness and turf traits

et al. 2007

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Many winter stresses aVect the ability of a perennial grass to overwinter in cold, temperate climates. Freezing tolerance is one of the major component traits aVecting winterhardiness. Although eVective freezing tolerance assessment procedures have long been available for perennial ryegrass (Lolium perenne L.), no work has been done to characterize plant collections in the United States that may possess novel variation for freezing tolerance and winterhardiness. In this study, 21 accessions sampled from a larger set of 300 accessions with known winterhardiness and 3 check varieties were subjected to environmentally-controlled, low temperature acclimation, followed by controlled freezing using a programmable laboratory freezer. Eight freezing treatments from ¡2 to ¡16°C were used to determine survival across the known spectrum of freezing tolerance in perennial ryegrass. LT 50 values were estimated based on whole plant survival, as well as tiller survival at each of the temperature treatments in the evaluation. LT 50 values for the accessions and checks ranged from ¡10.31 to ¡13.95°C, with 3 accessions possessing signiWcantly greater freezing tolerance than the most freeze-tolerant check, 'NK200'. LT 50 values were well correlated with winterhardiness in St. Paul during the winters of 2004-2005 and 2005-2006. Lower LT 50 values in this experiment were associated with greater spring growth following the stressful winter of 2004-2005 and upright growth habit. The lack of negative biological association between freezing tolerance and turf quality components indicates that freezing tolerance testing could be a useful tool in breeding and selection with landrace germplasm.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Freezing tolerance of selected perennial ryegrass (Lolium perenne L.) accessions and its association with field winterhardiness and turf traits

et al. 2007

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Yield, persistence, forage nutritive value, and preference of perennial ryegrass under grazing

et al. 2020

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Perennial ryegrass (PR) is a quality and high yielding forage that tends to lack winter hardiness to persist in the upper Midwest. The objective was to evaluate yield, stand persistence, forage nutritive value, and preference of experimental populations of winter hardy PR grown in monoculture and in mixture with white clover under livestock grazing. Research was conducted in St. Paul and Grand Rapids, MN. Meadow fescue (MF), tall fescue (TF), orchardgrass (OG), a reference PR, and two experimental populations of PR were grazed every 32 days by either horses (St. Paul) or cow-calf pairs (Grand Rapids). Prior to grazing, forage yield and quality samples were collected, and post-grazing, fields were visually assessed for the percentage of forage removal to determine preference. Yields of all PR (6.9 to 7.6 Mg ha −1) were similar, but lower compared to other coolseason grasses (CSG). Persistence was similar among all CSG in St. Paul; however, it was lower for all PR in Grand Rapids compared to other CSG. All PR were highly preferred by both horses (≥74% removal) and cattle (≥70% removal) and were consistently among the highest for crude protein (CP; 200 g kg −1), equine digestible energy (DE; 2.35 Mcal kg −1) and bovine metabolizable energy (ME; 2.6 Mcal kg −1), moderate for nonstructural carbohydrates (NSC; 136 g kg −1), and among the lowest for neutral detergent fiber (NDF; 518 g kg −1). Experimental populations of PR produced forage of high nutritive value, but yield and stand persistence may be less compared to other CSG at some locations. 1 INTRODUCTION Cool-season perennial grasses (CSG) are the foundation of productive pastures in the upper Midwest (Allen, Sheaf

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Predictive ability of perennial ryegrass spaced‐plant nurseries for turfgrass and seed production swards in Minnesota

2020

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Turf-type perennial ryegrass (Lolium perenne L.) success depends on adequate turfgrass quality and economical seed yield. In most breeding programs, spaced plants are the initial unit of selection in which observations of related individuals dictate the selection of superior germplasm for further testing. Therefore, spaced plants must be predictive of seed production and turfgrass growing environments. This study investigated the effectiveness of standard (three plants m −2 ) and competitive (23 plants m −2 ) spaced-plant nurseries as selection environments with respect to two sward environments as well as applying a novel image analysis technique for several key traits. Seed production, turfgrass, and the two spaced-plant growing environments were tested at two locations in Minnesota. Turfgrass quality traits were measured in 2017 and 2018 and seed production traits were measured in 2018. Automated image analysis was able to predict the traditional visual scoring values at both locations for crown rust (Puccinia coronata f.sp. lolii) severity [Pearson's correlation (r p ) > 0.79, P < .001], winter injury (r p > 0.89, P < .001), and turfgrass texture (r p > 0.88, P < .001). Increasing the competition among spaced plants altered the plant phenotype and improved accuracy for vegetative biomass, crown rust severity, seed yield, and, at one location, turfgrass quality. There was no benefit of increasing competition for several traits such as genetic color, fertile tillers, and spikelet number. Although the competitive design was not useful for all traits, pragmatically, the competitive design used less space and often made measurements and observations easier for bunch-type grasses.

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Winterhardiness and Turf Quality of Accessions of Perennial Ryegrass (Lolium perenne L.) from Public Collections

Cited by 27 publications

References 11 publications

Freezing tolerance of selected perennial ryegrass (Lolium perenne L.) accessions and its association with field winterhardiness and turf traits

Freezing tolerance of selected perennial ryegrass (Lolium perenne L.) accessions and its association with field winterhardiness and turf traits

Yield, persistence, forage nutritive value, and preference of perennial ryegrass under grazing

Predictive ability of perennial ryegrass spaced‐plant nurseries for turfgrass and seed production swards in Minnesota

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