Combining Ability for Seedling Vigor in <i>Bromus inermis Leyss</i><sup>1</sup>

Robinson, L. R.; Thomas, H. L.

doi:10.2135/cropsci1963.0011183x000300040024x

Cited by 8 publications

(3 citation statements)

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“…Seed weight has been shown to be related to seedling vigour in several grasses (DAVIES, 1927;ROGLER, 1954;KNEEBONE & CREMER, 1955;KALTON et al, 1959;TOSSELL, 1960;ROBINSON & THOMAS, 1963). Its effect has generally been found to be confined to the early stages of growth but it can persist for up to 3 months after sowing as in Bromus inermis (TRUPP ,~ CARLSON, 1971) and subterranean clover (BLACK, 1956(BLACK, , 1957.…”

Section: Introductionmentioning

confidence: 99%

The effect of seed weight and coleoptile tiller development on seedling vigour in tall fescue, Festuca arundinaceaSchreb.

Lewis

Garcia

1979

Euphytica

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INDEX WORDSFestuca arundinacea, tall fescue, seed weight, coleoptile tiller, seedling vigour, selection criterion. SUMMARYTwo characters, previously shown to influence the rate of seedling growth in tall fescue, were studied in detail in three distinct populations as part of a programme to improve seedling vigour in the species. The effect of seed weight was found to be confined to the very early stages of growth and was apparent in seedling dry matter yield but not in tiller number. The development of a tiller in the axil of the coleoptile, which varied significantly between populations, had a far greater and more permanent effect both in terms of dry matter yield and tiller number. The increase in tiller number attributable to the coleoptile tiller and its derivatives increased geometrically in step with the total tiller number, so that the intitial difference of 28~ in the first harvest remained practically unchanged in the subsequent three harvests. Similarly, the percentage difference in dry matter yield between plants with and without a coleoptile tiller remained more or less constant at about 22~ from the second harvest onwards.It is concluded that the development of a coleoptile tiller may prove to be a useful selection criterion in the breeding of this species.

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Section: Introductionmentioning

confidence: 99%

The effect of seed weight and coleoptile tiller development on seedling vigour in tall fescue, Festuca arundinaceaSchreb.

Lewis

Garcia

1979

Euphytica

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“…A number of workers have used the diallel crossing system for bromegrass studies. Where the parents may be regarded as a random sample, Model I has been used (Dunn and Wright 1970; Ross et al 79'70: Robinson and Thomas 1963;Tim-othy et al 1959). For crosses in which the parents have been selected for the characters studied, Model II has been used (Mishra and Drolson 1972;Drolson and Nielson 1970).…”

Section: Discussionmentioning

confidence: 99%

AN EVALUATION OF DISEASE RESISTANT CLONES OF BROMUS INERMIS (LEYSS.) AS BREEDING STOCKS

Walton¹

1974

Can. J. Plant Sci.

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“…The environmental component, determined by such factors as position in the inflorescence (Bean, 1973;Johnston, 1980) and conditions during seed development (McFadden, 1963;Whalley et al 19666;Bean, 1973Bean, , 1974, would certainly be substantial. Genetic variation in seed weights has been demonstrated within several grass species, and selecting for higher seed weight has been suggested as a means of improving seedling vigour in Bromusinermis (Robison & Thomas, 1963;Trupp & Carlson, 1971), Panicum, antidotale (Wright, 1976) and.F. arundinacea (Hayes, 1975).…”

Section: Introductionmentioning

confidence: 99%

Selection for seedling vigour in Festuca arundinacea

Faulkner¹,

Johnston²,

Mcaneney³

1982

J. Agric. Sci.

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Two sets of experiments were carried out to compare methods of selecting Festuca arundinacea (tall fescue) for improved seedling vigour.In the first, germination and seedling growth of four varieties (Goar, Lironde, S. 170, and ZW 42-6) were compared in hydroponic growth tanks. From each variety, groups of seedlings were selected for each of four vigour characters (speed of germination, leaf length, root length and speed of production of the second leaf) and a fifth group was selected at random as a control. Plants of each group were intercrossed in isolation and their progeny compared.In the second, S. 170 was studied through two cycles of selection in a soil-based compost. In the first cycle, groups of seedlings were selected for each of five characters (speed of emergence, leaf length, and speed of production of the second leaf, first axillary tiller and coleoptile tiller). Two further groups were selected randomly. In the second cycle, the progeny of each group were reselected for the same character as their parents. Both first-and second-cycle progeny were compared among themselves.Significant direct responses to selection were obtained in all characters except speed of germination in hydroponics. Indirect responses also occurred but were mostly smaller and in response to selection for a related character, e.g. selection for early tillering resulted in early second leaves and vice versa. Two cycles of selection raised the frequency of coleoptile tillers from about 5 to 55 %, but the concomitant advances in vigour characters were smaller than those achieved by direct selection. It is argued that for practical purposes the basic criterion in selecting for improved seedling vigour should be rapid attainment of a particular growth stage such as appearance of the first tiller. Since speed of emergence itself responded to selection, the attainment of such a stage should be related to date of sowing rather than of emergence or germination.In the progeny of the hydroponic selections, all characters showed significant varietal differences, some of them the reverse of differences between the parent populations of the varieties. These results illustrated the importance of seed provenance as a determinant of seedling vigour, and suggest that choice of parent material is important in breeding for improved vigour.

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Combining Ability for Seedling Vigor in Bromus inermis Leyss¹

Cited by 8 publications

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The effect of seed weight and coleoptile tiller development on seedling vigour in tall fescue, Festuca arundinaceaSchreb.

The effect of seed weight and coleoptile tiller development on seedling vigour in tall fescue, Festuca arundinaceaSchreb.

AN EVALUATION OF DISEASE RESISTANT CLONES OF BROMUS INERMIS (LEYSS.) AS BREEDING STOCKS

Selection for seedling vigour in Festuca arundinacea

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Combining Ability for Seedling Vigor in Bromus inermis Leyss1

Cited by 8 publications

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The effect of seed weight and coleoptile tiller development on seedling vigour in tall fescue, Festuca arundinaceaSchreb.

The effect of seed weight and coleoptile tiller development on seedling vigour in tall fescue, Festuca arundinaceaSchreb.

AN EVALUATION OF DISEASE RESISTANT CLONES OF BROMUS INERMIS (LEYSS.) AS BREEDING STOCKS

Selection for seedling vigour in Festuca arundinacea

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Combining Ability for Seedling Vigor in Bromus inermis Leyss¹