Polycross‐Progeny Testing of Red Clover (trifolium pratense L. 1

Crop Science ◽  
1968 ◽  
Vol 8 (4) ◽  
pp. 451-454 ◽  
Author(s):  
Norman L. Taylor ◽  
W. A. Kendall ◽  
W. H. Stroube
Keyword(s):  
Trifolium Pratense ◽  
Red Clover ◽  
Progeny Testing ◽  
Trifolium Pratense L

Selection for resistance to root rot caused by Fusarium spp. in red clover (Trifolium pratense L.)

1995 ◽  
Vol 75 (1) ◽  
pp. 141-146 ◽  
Author(s):  
B. E. Coulman ◽  
M. Lambert
Keyword(s):  
Root Rot ◽  
Adventitious Roots ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Progeny Testing ◽  
Fusarium Spp ◽  
Fusarium Root Rot ◽  
Disease Reaction ◽  
Trifolium Pratense L ◽  
Selection For

Root and crown rots caused by Fusarium spp. are a major cause of stand decline of red clover (Trifolium pratense L.) in North America. The goal of this study was to evaluate the effectiveness of one cycle of selection for resistance to Fusarium root rot. Plants of the red clover cultivars Florex and Arlington were screened for their resistance to infection by two isolates of Fusarium acuminatum and one isolate of F. avenaceum. Plants of various infection categories were intercrossed, and progenies were screened to estimate the heritability of resistance to these pathogens. Synthetics produced by intercrossing either highly resistant (R) or highly susceptible plants were evaluated under sward conditions in the field for dry matter yield, root rot and adventitious root development. There were significant (P = 0.05) differences in aggressiveness among the three Fusarium isolates used, with F. avenaceum 814 being the most aggressive. Plants classed as R for all three isolates were found in both cultivars; however, disease reaction was not always correlated among the isolates. Parent-progeny regressions or correlations of disease reaction were negative in the cultivar Arlington, while for Florex, a relatively low regression coefficient of 0.26 was found. In the field evaluation in the fall of the third year after seeding, synthetics of plants selected for resistance were either not different from, or higher in infection score than the parental cultivars, indicating that selection using one or two isolates/species was ineffective in improving field root rot resistance. Plants with more severely rotted roots showed a tendency to produce more adventitious roots from the crown. It was concluded that progeny testing would be necessary for selection to be effective for resistance to Fusarium root rot in red clover and that more that one isolate or species of the fungus should be used in screening programs. In addition, not all populations of red clover contain sufficient genetic variation for resistance to justify a selection program. Key words: Red clover, disease resistance, selection, root rot, adventitious roots, Trifolium pratense L., Fusarium spp.

Comparisons of Floral Response of Seed Lots of Dollard Red Clover, Trifolium pratense L. 1

Crop Science ◽  
1965 ◽  
Vol 5 (5) ◽  
pp. 425-428 ◽  
Author(s):  
R. J. Bula ◽  
R. G. May ◽  
C. S. Garrison ◽  
C. M. Rincker ◽  
J. G. Dean
Keyword(s):  
Trifolium Pratense ◽  
Red Clover ◽  
Trifolium Pratense L

scholarly journals Volatile Constituents of Trifolium Pratense and T. Repens from N.E. Italian Alpine Pastures

2009 ◽  
Vol 4 (6) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Aldo Tava ◽  
Daniele Ramella ◽  
Maris Grecchi ◽  
Paolo Aceto ◽  
Renato Paoletti ◽  
...  
Keyword(s):  
Steam Distillation ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Volatile Oil ◽  
Volatile Fraction ◽  
Fresh Weight ◽  
Fresh Weight Basis ◽  
Qualitative And Quantitative ◽  
Aerial Parts ◽  
Trifolium Pratense L

The composition of the volatile fraction of two important forage legumes from Italian sub-alpine N.E. pastureland, namely Trifolium pratense L. subsp. pratense (red clover) and T. repens subsp. repens (white clover) were investigated. The volatile oil was obtained from the fresh aerial parts by steam distillation and analyzed by GC/FID and GC/MS. The oil yield was 0.018 and 0.021% (weight/fresh weight basis) for T. pratense and T. repens, respectively. Several classes of compounds were found in both the oils, including alcohols, aldehydes, ketones, terpenes, esters, hydrocarbons, phenolics and acids. Qualitative and quantitative differences were found.

scholarly journals Identification of an extensive gene cluster among a family of PPOs in Trifolium pratense L. (red clover) using a large insert BAC library

2009 ◽  
Vol 9 (1) ◽  
pp. 94 ◽  
Author(s):  
Ana Winters ◽  
Sue Heywood ◽  
Kerrie Farrar ◽  
Iain Donnison ◽  
Ann Thomas ◽  
...  
Keyword(s):  
Gene Cluster ◽  
Trifolium Pratense ◽  
Bac Library ◽  
Red Clover ◽  
Trifolium Pratense L

scholarly journals Mineral Composition of Red Clover under Rhizobium Inoculation and Lime Application in Acid Soil

2015 ◽  
Vol 43 (2) ◽  
pp. 554-560 ◽  
Author(s):  
Olivera STAJKOVIC-SRBINOVIC ◽  
Dušica DELIC ◽  
Nataša RASULIC ◽  
Dragan CAKMAK ◽  
Djordje KUZMANOVIC ◽  
...  
Keyword(s):  
Mineral Composition ◽  
Rhizobium Leguminosarum ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Red Clover ◽  
Dry Weight ◽  
Rhizobium Inoculation ◽  
Shoot Dry Weight ◽  
Trifolium Pratense L ◽  
Lime Application

In the present study the effects of Rhizobium inoculation and lime application on the mineral composition (N, P, K, Ca, Mg, Fe, Mn, Cu, Zn, B) of red clover (Trifolium pratense L.), in very acid soil were evaluated. Inoculation with Rhizobium leguminosarum bv. trifolii significantly increased shoot dry weight (SDW) of red clover plants (three times greater), as well as N, Mg, Fe, Mn and Cu contents in plants compared to the control. Application of lime and Rhizobium together, depending on the lime rate (3, 6 or 9 t ha-1 of lime) and the cut, increased SDW significantly, but decreased the contents of N, P, K, Mg, Mn, Zn and B in plants. Regardless of the changes, in all treatments in both cuts, contents of N, K, Ca, Mg, Mn and Zn in plants were among sufficiency levels (Mg content was elevated in the second cut), while Fe content was mainly high, as well as Cu (in the second cut). Contents of P and B in plants were somewhat lower than sufficiency levels, but above critical level. Therefore, red clover can be grown with satisfactory yield and mineral composition in acid soil with Rhizobium inoculation only, but the application of P and B fertilization is desirable.

scholarly journals PHOSPHORUS-MOLYBDENUM RELATIONSHIP IN SOIL AND RED CLOVER (Trifolium pratense L.) ON AN ACID ANDISOL

2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Alejandra E Ribera ◽  
Maria de la Luz Mora ◽  
Vanessa Ghiselini ◽  
Rolando Demanet ◽  
Felipe Gallardo
Keyword(s):  
Trifolium Pratense ◽  
Red Clover ◽  
Trifolium Pratense L
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