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| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2012.pdf#page=45
Last checked: 02/08/2012
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Saxena, Priti;
Bonos, Stacy A.;
Meyer, William A. |
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| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University |
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| Title: | Determination of the gene effects controlling rapid lateral tillering rate and rhizome formation in tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | New Brunswick, New Jersey: January 6, 2012 |
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| Source: | Proceedings of the Twenty-First Annual Rutgers Turfgrass Symposium. 2012, p. 44-45. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Rutgers, The State University of New Jersey |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Cultivar evaluation; Diallel crosses; Festuca arundinacea; Genetic analysis; Lateral growth; Plant density; Rhizome growth; Tillering rate
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| Abstract/Contents: | "Tall fescue [Lolium arundinaceum (Schreb.) Darbys.] is a cool season, perennial, self-incompatible, bunch type turfgrass, which spreads primarily by erect tillers. However, some types have been found that have a rapid lateral tillering rate and rhizome formation. The rapid tillering rate and rhizome formation are beneficial in tall fescue as they help plants to spread faster and recover from damage. Tall fescue clones with three types of growth habit classified as: 'Bunch type' which spreads by erect tillers; 'broad base type' which spreads by lateral tillers; and 'rhizome type' which produce rhizomes along with tillers were used in controlled diallel crosses to study the inheritance of rapid lateral tillering rate and rhizome formation in tall fescue. Two genotypes from each growth type were selected and allowed to cross in isolation in all possible combinations. Progenies were planted in teh field in randomized complete block design with four replications. Turf density (to represent rapid lateral tillering) and number of rhizomes were collected on the progeny of the controlled crosses. Narrow sense heritability estimates, maternal effects and heterosis were calculated. Significant heterosis and maternal effects were found for turf density in the broadbase type parent crosses and rhizome type parent crosses, including reciprocals. Significant heterosis was found inthe bunch type parent crosses and when bunch type parents were crossed with broad base type parents. Significant maternal effects were found in the corsses between rhizome type and bunch type parents and their reciprocals. The narrow sense heritability estimates was very high for turf density. Broadbase type parents and bunch type parents had the highest mid parent-progeny mean followed by the braodbase type parents. Rhizome type parents have the lowest mid parent-progeny mean. For rhizome formation, significant heterosis and maternal gene effects were found in the rhizome type parent crosses including reciprocals, the broad base type crossed with bunch type parents and the broad based type crossed with the rhizome type parents, respectively. Based on the narrow sense heritability estimates, rhizome formation is heritable, but less than turf density. Rhizome type parents have the highest mid parent-progeny mean. Significant heterosis and maternal effects for turf densitty and rhizome formation in tall fescue might be due to dominant gene effects, which allow the expression of contributed genes from one parent than other parent in a cross, resulting in desired trait formation. High narrow sense heritability suggest the additive gene effects may be strongly influencing turf density and rhizome formation. However, further analysis of combining ability will be helpful to confirm the type of gene actions influencing these traits. Diallel analysis has proven to be useful to evaluate the performance of parents based on progeny tests, selecting superior parents, and improving breeding efficiency for the rapid tillering rate and rhizome formation in tall fescue." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Saxena, P., S. A. Bonos, and W. A. Meyer. 2012. Determination of the gene effects controlling rapid lateral tillering rate and rhizome formation in tall fescue [Lolium arundinaceum (Schreb.) Darbysh.]. Proc. Rutgers Turfgrass Symp. p. 44-45. |
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| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2012.pdf#page=45
Last checked: 02/08/2012
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b3696858 |
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