scholarly journals DETERMİNATİON OF FORAGE PERFORMANCE OF SOME MEADOW BROMEGRASS (BROMUS RİPARİUS L. ) CLONES İN THRACE REGİON OF TURKEY.

2018 ◽  
Vol 6 (4) ◽  
pp. 1313-1318
Author(s):  
Ilker Nizam ◽  
◽  
EyupErdem Teykin ◽  
Cansu Yilmaz ◽  
Metin Metin ◽  
...  
Keyword(s):  
Bromus Riparius ◽  
Meadow Bromegrass ◽  
Thrace Region

Parent-offspring regression in meadow bromegrass (Bromus riparius Rehm.): Evaluation of two methodologies on heritability estimates

2004 ◽  
Vol 84 (1) ◽  
pp. 125-127
Author(s):  
Marcelo R. A. de Araujo ◽  
B. E. Coulman
Keyword(s):  
Regression Analysis ◽  
Block Design ◽  
Covariance Analysis ◽  
Regression Estimate ◽  
Regression Methods ◽  
Randomized Block Design ◽  
Bromus Riparius ◽  
Heritability Estimates ◽  
Analysis Error ◽  
Meadow Bromegrass

To determine the nature and extent of inflation of estimates of heritabilities by parent-offspring regression methods, 40 clones of meadow bromegrass (Bromus riparius Rehm.) and their half-sib progenies were studied in completely randomized block design trials, with six replications in Saskatoon and Melfort, Canada. Clones and progenies were evaluated for dry matter yield, seed yield, plant height, fertility index and harvest index. The results of the analysis showed a consistent inflation of heritability estimates derived from the simple parent-offspring regression, when compared to the regression estimate by variance-covariance analysis. The two methods successfully removed the environmental covariances from the estimates. However, in the simple regression analysis, error covariance was not removed from the numerat or; therefore, heritabilities estimated by this methodology were higher than those estimated by the variance-covariance method. It was concluded that estimates derived from variance-covariance analysis provide less biased estimates of heritability. Key words: Regression analysis, heritability, meadow bromegrass

scholarly journals Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones

2004 ◽  
Vol 34 (2) ◽  
pp. 505-510 ◽  
Author(s):  
Marcelo Renato Alves de Araújo ◽  
Bruce Coulman
Keyword(s):  
Genetic Variation ◽  
Crude Protein ◽  
Genetic Correlations ◽  
Neutral Detergent Fiber ◽  
Broad Sense ◽  
Grass Species ◽  
Broad Sense Heritability ◽  
Bromus Riparius ◽  
Heritability Estimates ◽  
Meadow Bromegrass

Meadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it a major grass species for pasturing beef animals in this region. As relatively little breeding work has been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate total genetic variability, broad-sense heritability, phenotypic and genetic correlations. Forty-four meadow bromegrass clones were evaluated for agronomic characters. Genetic variation for dry matter yield, seed yield, fertility index, harvest index, plant height, plant spread, crude protein, neutral detergent fiber and acid detergent fiber, was significant. Broad-sense heritability estimates exceeded 50% for all characters. Heritability estimates were at least 3.5 times greater than their standard errors. Phenotypic and genetic correlation between all possible characters were measured. There was general agreement in both sign and magnitude between genetic and phenotypic correlations. Correlations between the different characters demonstrated that it is possible to simultaneously improve seed and forage yield. Based on the results, it appears that the development of higher yielding cultivars with higher crude protein, and lower acid and neutral detergent fibers concentration should be possible.

Productivity and sustainability of four grazed grass – alfalfa mixtures

1999 ◽  
Vol 79 (1) ◽  
pp. 83-89 ◽  
Author(s):  
N. W. Holt ◽  
P. G. Jefferson
Keyword(s):  
Medicago Sativa ◽  
Great Plains ◽  
Ground Cover ◽  
Forage Yield ◽  
Intermediate Wheatgrass ◽  
Bromus Riparius ◽  
Russian Wildrye ◽  
Medicago Sativa L ◽  
Meadow Bromegrass ◽  
Forage Yields

Forage grasses need to be evaluated in pasture trials in the Great Plains region of North America. The objective of this study was to compare four grass–alfalfa (Medicago sativa L.) mixtures for productivity and persistence when grazed during spring and summer. The grasses were Altai wildrye (Leymus angustus [Trin.] Pilger), intermediate wheatgrass (Elytrigia intermedia [Host] Nevski), meadow bromegrass (Bromus riparius Rehm. syn. B. biebersteinii Roem. & Schult.) and Russian wildrye (Psathyrostachys junceus [Fisch.] Nevski), with grass rows seeded perpendicular to the alfalfa rows. Two sites, 4 km apart, were grazed with yearling beef cattle from 1987 to 1993. Forage yield differed among grass treatments in 4 of 5 years, but differences were inconsistent over time. Five-year mean forage yields and total livestock production were not significantly different among the four grasses. Mean annual forage yields ranged from 800 to 8170 kg ha−1 and were related to the amount of growing season (April–August) precipitation. Carrying capacity ranged from 35 steer grazing days per hectare in 1992 to 176 in 1991. Grasses in the mixtures did have a significant effect on the grass–alfalfa ratio and on ground cover. Alfalfa content was highest when grown with Altai wildrye and lowest when grown with Russian wildrye. Percentage of ground cover by the grass plus alfalfa increased from an average of 3.8% in 1987 to 16.1% at one site and 31.9% at the second site by 1993. Russian wildrye contained the least alfalfa and weeds after 7 yr. Intermediate wheatgrass and Altai wildrye did not compete with invading weeds at one site, or with alfalfa at the other, and should not be recommended for spring–summer pastures in semiarid regions. Meadow bromegrass maintained a balance of grass and alfalfa and further research should confirm its persistence in semiarid climates. Key words: Leymus angustus, Elytrigia intermedia, Bromus riparius, Psathyrostachys junceus, Medicago sativa, grazing with cattle

scholarly journals DETERMINATION OF SOME MORPHOLOGICAL CHARACTERS AND FORAGE YIELD OF VETCH (Vicia sp.) GENOTYPES COLLECTED FROM THRACE REGION OF TURKEY

2018 ◽  
Vol 6 (11) ◽  
pp. 276-283
Author(s):  
AlpKayahan Demirkan ◽  
◽  
Ilker Nizam ◽  
Adnan Orak ◽  
Canan Şen ◽  
...  
Keyword(s):  
Morphological Characters ◽  
Forage Yield ◽  
Thrace Region

Grazing tolerance of alfalfa (Medicago spp.) under continuous and rotational stocking systems in pure stands and in mixture with meadow bromegrass (Bromus riparius Rehm. syn. B. biebersteinii Roem & Schult)

2002 ◽  
Vol 82 (2) ◽  
pp. 337-347 ◽  
Author(s):  
F. Katepa-Mupondwa ◽  
A. Singh ◽  
S. R. Smith Jr. ◽  
W. P. McCaughey
Keyword(s):  
Beef Cattle ◽  
Medicago Sativa ◽  
Basal Area ◽  
Western Canada ◽  
Percent Cover ◽  
Mixed Stands ◽  
Grazing Tolerance ◽  
Bromus Riparius ◽  
Medicago Sativa L ◽  
Meadow Bromegrass

The continuing development of adapted alfalfa (Medicago sativa L.) cultivars that combine high yield, disease resistance, winterhardiness, and grazing tolerance is of great value to the beef cattle industry in western Canada. This study evaluated alternative management strategies and plant measurements for assessing the grazing tolerance of alfalfa cultivars over 3 yr. Seven hay-type, four pasture-type, and one dual-purpose (hay or graze) cultivars were established in pure stands and in mixture with meadow bromegrass (Bromus riparius Rehm. syn.B. biebersteinii Roem & Schult). Stands were defoliated under continuous or rotational stocking with beef cattle (Bos taurus). Plants we reassessed for winterhardiness, percent alfalfa within row, percent alfalfa cover, basal area and species composition. Continuous stocking resulted in consistent and significant differences between cultivars, whether persistence was measured as percent alfalfa within row, percent cover and basal area, in both pure and mixed stands (P < 0.05). High correlations between measurement techniques (r = 0.74 to 0.99; P < 0.05) confirmed the value of alfalfa within row and alfalfa cover as time and labour efficient methods to evaluate grazing persistence. Competition between alfalfa and meadow bromegrass resulted in a significant confounding effect under rotational stocking (P < 0.05). Winter injury was identified as an important criteria to evaluate for grazing persistence. The most grazing-tolerant genotypes were selected for subsequent breeding efforts to combine winterhardiness, grazing tolerance, and high productivity. This research showed that grazing method, grass competition, and severe winter conditions strongly influence differential survival of alfalfa cultivars under grazing in western Canada. Key words: Alfalfa, grazing tolerance, grazing systems, Medicago sativa L., Medicago falcata L. Arcang, persistence

Success hybrid bromegrass

2006 ◽  
Vol 86 (3) ◽  
pp. 745-747 ◽  
Author(s):  
Bruce Coulman
Keyword(s):  
Bromus Inermis ◽  
Forage Yield ◽  
Smooth Bromegrass ◽  
Soil Zone ◽  
Bromus Riparius ◽  
Cultivar Description ◽  
Plant Characteristics ◽  
Meadow Bromegrass ◽  
Forage Yields ◽  
Prairie Provinces

Success hybrid bromegrass was selected from populations produced by backcrossing smooth bromegrass (Bromus inermis Leyss.) with hybrid populations resulting from crosses between meadow bromegrass (Bromus riparius Rehm.) and smooth bromegrass. Success has a unique array of plant characteristics, some similar to meadow bromegrass, and others more similar to smooth bromegrass; overall, it more closely resembles smooth brome. In regional trials in the prairie provinces of western Canada, Success produced forage yields greater than meadow brome, but lower than smooth bromegrass. In the drier brown soil zone of the prairie provinces, Success was superior to both meadow and smooth bromegrass in forage yield. It was superior to smooth bromegrass in regrowth after cutting and had lower concentrations of acid-detergent fiber than meadow bromegrass. Key words: Hybrid bromegrass, Bromus riparius × Bromus inermis, cultivar description

Steer performance grazing hybrid bromegrass pastures

2003 ◽  
Vol 83 (1) ◽  
pp. 165-169 ◽  
Author(s):  
L. C. Thompson ◽  
H. A. Lardner ◽  
R. D. H. Cohen ◽  
B. E. Coulman
Keyword(s):  
Average Daily Gain ◽  
Black Soil ◽  
Bromus Inermis ◽  
First Year ◽  
Crested Wheatgrass ◽  
Animal Data ◽  
Bromus Riparius ◽  
New Varieties ◽  
Meadow Bromegrass

Producers in Saskatchewan require grazing information on new grass cultivars to improve production and quality of existing forage stands. Animal data are ultimately needed to validate the performance of these new varieties under grazed conditions. A 2-yr field experiment was conducted (2000–2001) to determine steer performance and species utilization when grazing crested wheatgrass (Agropyron pectiniforme R. & S.), smooth bromegrass (Bromus inermis Leyss.) and meadow bromegrass (Bromus riparius Rehm.) compared to hybrid bromegrass (Bromus riparius × Bromus inermis) pasture on an Orthic Black soil in east central Saskatchewan. Weight gain (kg d-1) was greater (P < 0.05) for steers grazing hybrid bromegrass pasture than crested wheatgrass pasture in the first year. However, in 2001, steers grazing crested wheatgrass pastures had greater (P < 0.05) average daily gain (ADG) than those grazing other pasture types. Total beef production (TBF) was greatest in both years (160 and 185 kg ha-1) from the hybrid bromegrass pastures. The greatest (P < 0.05) animal grazing days (AGD) were observed on hybrid bromegrass pastures. These results suggest that AC Knowles hybrid bromegrass is a suitable species for pasture use in Saskatchewan. Key words: Grazing, utilization, steer, grass pasture

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