Relationship between spring vigor and the presence of adventitious roots in established stands of red clover (<i>Trifolium pratense</i> L.)

Montpetit, J. M.; Coulman, Bruce

doi:10.4141/cjps91-108

Cited by 6 publications

(6 citation statements)

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“…Similar observations have been made for white clover (Gibson & Trautner, 1965) and alsike clover (Townsend, 1964). A recent experiment showed that profuse adventitious root growth from red clover crowns imparted better spring vigor of plants in three and four year old stands (Montpetit & Coulman, 1991).…”

Section: Introductionsupporting

confidence: 66%

“…Moderate correlation coeffi- (Montpetit & Coulman, 1991) indicating the higher consistency of measurements when adventitious roots were larger. The difficulty in measuring the smaller adventitious root volumes in the present study lead to more variation in the results, possibly explaining the poor correlation of this root volume with variables other than adventitious root score.…”

Section: Relationship Between Root and Shoot Charactersmentioning

confidence: 99%

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Responses to divergent selection for adventitious root growth in red clover (Trifolium pratense L.)

Montpetit

Coulman

1991

Euphytica

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Red clover (Trifolium pratense L.) persistence is improved by the growth of adventitious roots from the crown. The effect of one cycle of divergent phenotypic selection for adventitious roots in red clover was evaluated and root and shoot traits including degree of flowering habit correlated. Three classes of single-cross progenies were produced by crossing plants within and between the high and low root selections. Parents and progeny were grown as spaced plants. Adventitious root score and volume were significantly correlated (p < 0.05); however they generally had low or nonsignificant correlations with other variables. A significant correlation (r = -0.36, p < 0.01) was found between adventitious root score and flowering score (growth type) in 1988 but not in 1989. Significant variation was found among the three classes of single-cross progeny for adventitious root score and crown diameter. The effect of progeny class on score of adventitious roots was not linear, suggesting dominance effects for the absence of adventitious roots may have been present. A narrow-sense heritability estimate of 0.30 was found by midparent offspring regression of the adventitious root score. This low heritability value implies that successful selection would require progeny testing.

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Section: Introductionsupporting

confidence: 66%

Section: Relationship Between Root and Shoot Charactersmentioning

confidence: 99%

Responses to divergent selection for adventitious root growth in red clover (Trifolium pratense L.)

Montpetit

Coulman

1991

Euphytica

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“…Several authors have suggested that to increase the persis- tence of red clover, one should select for a more fibrous root system (Sawai et al 1986;Smith 1989;Montpetit and Coulman 1991). There is some evidence that such selection leads to increased persistence (Smith 1989;McLean and Nowak 1998 ).…”

Section: Discussionmentioning

confidence: 99%

“…Several other reports indicate that the more persistent types have a more prolific root system (Kendall and Stringer 1985;Sawai et al 1986;Smith 1989). It has also been suggested that selection for a more fibrous root system should result in an increase in persistence (Montpetit and Coulman 1991;McLean and Nowak 1998).One of the aims of the red clover breeding program at the Crops and Livestock Research Centre is to develop cultivars of red clover with increased persistence, using phenotypic recurrent selection. Here persistence is defined as the ability to survive in the field for 3 or 4 yr.…”

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Selection for persistence in red clover

Christie¹,

Martin²

1999

Can. J. Plant Sci.

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Christie, B. R. and Martin, R. A. 1999. Selection for persistence in red clover. Can. J. Plant Sci. 79: [357][358][359]. To increase the persistence of red clover (Trifolium pratense L.), phenotypic recurrent selection was conducted under field conditions. After three cycles of selection, a strain designated as CRS-16, was developed. This strain has better persistence than the check cultivars, Florex and Marino, and has a more fibrous root system. Among 4-yr-old plants, about 10% initiated new shoots from below the crown. Although red clover (Trifolium pratense L.) is considered to be a perennial, it generally behaves as a biennial or a shortlived perennial. In most regions where it is grown, it will live only 3 or 4 yr (Taylor and Quesenberry 1996). In Atlantic Canada, it will survive for 2 yr, i.e., the year of seeding and the first harvest year, and may survive into the third year. There would be an advantage for a cultivar which would survive consistently for 3 or 4 yr.Cressman (1967) found that most plants died in the second and third year due to deterioration of the crown. However, he noted differences among plants with regard to the type of root. The more persistent plants were reported to have a larger root system with more adventitious roots arising from the main taproot, or from the crown. The less persistent types had a main taproot, and few other roots; these types will die if the crown deteriorates. Several other reports indicate that the more persistent types have a more prolific root system (Kendall and Stringer 1985;Sawai et al. 1986;Smith 1989). It has also been suggested that selection for a more fibrous root system should result in an increase in persistence (Montpetit and Coulman 1991;McLean and Nowak 1998).One of the aims of the red clover breeding program at the Crops and Livestock Research Centre is to develop cultivars of red clover with increased persistence, using phenotypic recurrent selection. Here persistence is defined as the ability to survive in the field for 3 or 4 yr. MATERIALS AND METHODSIn 1980, 6000 plants were established at Charlottetown in a spaced planting with 1 m centres. In the fall, 1982, 50 superior plants were selected (Choo 1984) and open-pollinated seed was harvested from each of these plants separately. Of these 50 plants, 38 were selected from the cultivar Florex. In 1983, 40 progeny plants from each selection were established in a second spaced planting. In 1985, seed was harvested from all the surviving plants (about 100) and bulked. This seed was increased and formed the basis of the cultivar AC Charlie .In 1987, AC Charlie was included in a yield trial seeded at Charlottetown. In the summer of 1990, all surviving plants of AC Charlie were dug (approximately 300 plants). The roots were examined for size, and for freedom from disease. To select for disease resistance, the roots were cut about 8 cm below the crown and examined in cross section. About 50 plants, identified as disease free, were brought into the greenhouse and intercrossed using bumblebees for p...

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Commercial Importance of Adventitious Rooting to Agronomy

Kovar

Kuchenbuch

1994

Biology of Adventitious Root Formation

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Relationship between spring vigor and the presence of adventitious roots in established stands of red clover (Trifolium pratense L.)

Cited by 6 publications

References 1 publication

Responses to divergent selection for adventitious root growth in red clover (Trifolium pratense L.)

Responses to divergent selection for adventitious root growth in red clover (Trifolium pratense L.)

Selection for persistence in red clover

Commercial Importance of Adventitious Rooting to Agronomy

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