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| Web URL(s): | https://www.jstor.org/stable/23433375?seq=1
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https://www.jstor.org/stable/pdf/23433375.pdf
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Garay, Adriel;
Nott, Heather;
Elias, Sabry |
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| Author Affiliation: | Oregon State University Seed Laboratory, Oregon State University, Corvallis, OR |
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| Title: | Better alternative to breaking multiple seed units in tall fescue |
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| Meeting Info.: | St. Paul, Minnesota: June 5-12, 2008 |
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| Source: | Seed Technology. Vol. 30, No. 1, 2008, p. 86-87. |
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| Publishing Information: | Lincoln, Nebraska: Association of Official Seed Analysts and Society of Commercial Seed Technologists |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Festuca arundinacea; Methodology; Seed quality; Seed testing
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| Abstract/Contents: | "The AOSA Rules for Testing Seeds treats multiple florets in grasses differently. For example in tall fescue and ryegrasses, it requires the analysts to break them apart manually to estimate the inert and pure seed units, which is time consuming and can create variability. In orchardgrass and fine fescues, it uses the factor method, which is more time efficient and reduces subjectivity. Kentucky bluegrass, which uses a blowing procedure, multiple seed units (MSUs) are left intact. The last option is efficient, eliminates subjectivity, does not change the nature of the sample and the result reflects the true condition of the seed as it is being marketed and planted. Research was conducted to determine if a better alternative to breaking multiples can be identified for tall fescue. The research included the following steps: First, the frequency of multiple florets in tall fescue samples was measured using samples from 2006 and 2007 crop years. The results in both years indicated that 96% of samples contained less than 50 multiples and less than 1% of samples showed 100 multiples or above. The low number of multiples present in the sample suggested that even if all multiples are left intact, its potential to influence purity and germination results would be small. Second, blowing was used to determine if light weight multiples, which contain no caryopsis, can be separated. Regardless of the number of multiples present in the sample, blowing lifted most empty multiples which did not show germination value. On the other hand, most of the multiples that remained in the pure seed portion contained caryopsis larger than 1/3 and the majority of them germinated. This indicated that if a blowing procedure is used, tall fescue florets in the light fraction (including multiples) can be considered inert; whereas those in the heavy portion (including multiples) can be considered pure seed. Third, the new method (blowing tall fescue first and leaving the multiples intact) was compared with the current AOSA method (where blowing is not required and multiples have to be broken apart). This comparison was performed in-house and followed by a national referee study. The new method produced comparable results to the current AOSA method, furthermore, when the number of multiple florets neared 100 in the blind samples, the new method produced more uniform results. A second year referee demonstrated that breaking or not breaking multiples present in the heavy portion, produced comparable germination results. This indicates that multiples found in the heavy portion (after blowing) has planting like single pure seed units. The time efficiency was measured during the national referee study. All participant labs saved time using the new method over the current AOSA method. Based on all the above studies, a rule change is proposed. The sample would be blown using the proposed blowing procedure for tall fescue, then, any multiple present in the light portion would be considered inert and multiples present in the heavy portion would be considered pure seed units. In essence, tall fescue would be treated the same as Kentucky bluegrass. The beneficial implications of the new method for testing tall fescue will be discussed." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"Abstracts from oral and poster presentations given at the 98th Association of Official Seed Analysts and the 5th Society of Commercial Seed Technologists (AOSA/SCST) annual meeting" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Garay, A., H. Nott, and S. Elias. 2008. Better alternative to breaking multiple seed units in tall fescue. Seed Technology. 30(1):p. 86-87. |
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| Web URL(s):
https://www.jstor.org/stable/23433375?seq=1
Last checked: 04/15/2016
Access conditions: Item is within a limited-access website
https://www.jstor.org/stable/pdf/23433375.pdf
Last checked: 04/15/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b3628131 |
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