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Web URL(s):https://www.dl.sciencesocieties.org/publications/cs/articles/42/2/534
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https://www.dl.sciencesocieties.org/publications/cs/pdfs/42/2/534
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Publication Type:
i
Refereed
Author(s):Vaylay, Ravi; van Santen, Edzard
Author Affiliation:Department of Agronomy and Soils, Auburn University, Auburn, AL
Title:Application of canonical discriminant analysis for the assessment of genetic variation in tall fescue
Article Series:Forage & grazing lands
Source:Crop Science. Vol. 42, No. 2, March/April 2002, p. 534-539.
Publishing Information:Madison, WI: Crop Science Society of America
# of Pages:6
Keywords:TIC Keywords: Genetic variability; Analytical methods; Festuca arundinacea; Age; Cultivar variation
Abstract/Contents:"Tall fescue pastures are perennial in habit and are continually exposed to intensive natural selective forces. Therefore, the genetic composition of tall fescue cultivars changes with time and the selection in cumulative. The objective of this study was to investigate the genetic diversity of tall fescue cultivars and age groups within cultivars in response to natural selective forces using a multivariate statistical method, canonical discriminant analysis. Ungrazed survivors from four cultivars (GA-5 EF, GA-5 EI, Johnstone, and KY-31) were collected randomly from four 1-yr-old paddocks. These paddocks were then grazed at 2.50, 3.75, 5.00, and 6.25 Angus yearling steers ha-1 for 2 yr, and grazed survivors were collected in a similar fashion as that of ungrazed survivors. The ungrazed and grazed groups were compared in a 2-yr study along with plants grown directly from the original seed lots. Significant genetic diversity was noticed among these four tall fescue cultivars and clearly depicted the relationship of cultivars by ancestry and endophyte status. Significant genetic diversity between GA-5 EF and GA-5 EI indicated that the removal of endophyte resulted in a different cultivar with altered morphological and agronomic characteristics. Significant genetic diversity was observed among the age groups in GA-5 EF, GA-5 EI, and Johnstone. The age groups of KY-31 were stable in terms of genetic variation. These results indicated that changes in genetic variation occurred in a short period of time, that is, 3-yr old paddocks of GA-5 EF, GA-5 EI, and Johnstone."
Language:English
References:19
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vaylay, R., and E. van Santen. 2002. Application of canonical discriminant analysis for the assessment of genetic variation in tall fescue. Crop Sci. 42(2):p. 534-539.
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Web URL(s):
https://www.dl.sciencesocieties.org/publications/cs/articles/42/2/534
    Last checked: 05/05/2017
    Access conditions: Item is within a limited-access website
https://www.dl.sciencesocieties.org/publications/cs/pdfs/42/2/534
    Last checked: 05/05/2017
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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