Full TGIF Record # 269790
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Web URL(s):https://archive.lib.msu.edu/tic/its/articles/1974sup1b.pdf
    Last checked: 03/15/2016
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Publication Type:
i
Report
Content Type:Abstract or summary only
Author(s):Schmit, R. M.; Funk, C. R.; Duell, R. W.
Author Affiliation:Soils and Crops, Rutgers, University [Rutgers University]
Title:Self incompatibility and isolation barriers in selected fine fescue (Festuca rubra L. subsp. rubra, F. rubra subsp. commutata Guad., and F. longifolia Thuill.) clones
Section:Turfgrasses
Other records with the "Turfgrasses" Section
Meeting Info.:Blacksburg, Virginia: June 19-21, 1973
Source:Abstracts of Papers Presented at the Second International Turfgrass Research Conference. 1973, p. 1-2.
# of Pages:2
Publishing Information:Blacksburg, Virginia: [International Turfgrass Society]
Keywords:TIC Keywords: Breeding aims; Breeding program; Clones; Cultivar improvement; Cultivar variation; Festuca ovina subsp. duriuscula; Festuca rubra subsp. commutata; Festuca rubra subsp. rubra; Genetic variability; Self-incompatibility; Taxonomy
Abstract/Contents:"Recently, considerable breeding effort has been undertaken to develop improved fine fescue cultivars. Unfortunately, however, the taxonomy of these grasses has been the subject of much confusion in the literature. In particular, little information exists as to the breeding inter-relationships in terms of isolating factors. Superior fine fescue clones and cultivars were observed and morphologically typed in a space-plant nursery and in turf plots. Characteristics including seedling vigor, degree of rhizome development, disease resistance and root growth were examined. Diverse types within each group were brought into the greenhouse in early spring to observe flowering habits. Chromosome counts of select plants were made. Crossing of distinct fine fescue types appears limited by anthesis date, hour of pollen shed, degree of selfing of the female parent and/or differences in chromosome number. Distinct differences exist between fescue types with regard to pollinating date and time of day. Strongly rhizomatour (F. rubra var. rubra) plants flower in late afternoon and appear to have a chromosome number of 56, thereby isolating them from 42 chromosome weak creeping types. Chewings-type fescue (F. rubra var. commutata) sheds pollen in the early morning as do hard fescue cultivars (F. longifolia), but flowering is several days later in Chewings-types. In addition, preliminary studies of pollen germination in vitro indicate, that pollen viability drops off rapidly after dehiscence. Pollen shed at sunrise loses virtually all viability by early afternoon. This reinforces temporal isolation of distinct fine fescue groups, particularly isolating Chewings-types from spreading red fescues. Self-compatibility was assessed in clones of selected Chewing-types and spreading-type fescues. Wide variability in selfing occurred between clones. Attempts to select for differences in self-compatibility appear encouraging. Practical applications of self-incompatibility are discussed."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Schmit, R. M., C. R. Funk, and R. W. Duell. 1973. Self incompatibility and isolation barriers in selected fine fescue (Festuca rubra L. subsp. rubra, F. rubra subsp. commutata Guad., and F. longifolia Thuill.) clones. Int. Turfgrass Soc. Annexe - Tech. Pap. p. 1-2.
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https://archive.lib.msu.edu/tic/its/articles/1974sup1b.pdf
    Last checked: 03/15/2016
    Requires: PDF Reader
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