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Second Indicator |
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| LEADER |
00000ctm a2200000Ka 4500 |
| 001 |
in00001843653 |
| 005 |
20190325112014.0 |
| 008 |
040820s2003 xx b 000 0 eng d |
| 035 |
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|a (OCoLC)ocm56327474
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| 037 |
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|a 31-13310
|b UMI
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| 040 |
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|a TXA
|c TXA
|d UtOrBLW
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| 049 |
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|a TXAM
|a TXAR
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| 099 |
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|a 2003
|a Dissertation
|a J654
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| 100 |
1 |
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|a Jones, Darren Gerald.
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| 245 |
1 |
0 |
|a Efficiency of early generation testing in upland cotton /
|c by Darren Gerald Jones.
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| 264 |
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1 |
|a [Place of publication not identified] :
|b [publisher not identified] ;
|c 2003.
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| 300 |
|
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|a x, 106 leaves ;
|c 28 cm.
|
| 336 |
|
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|a text
|b txt
|2 rdacontent
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| 337 |
|
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|a unmediated
|b n
|2 rdamedia
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| 338 |
|
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|a volume
|b nc
|2 rdacarrier
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| 502 |
|
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|b Ph. D.
|c Texas A&M University
|d 2003
|
| 504 |
|
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|a Includes bibliographical references (leaves 56-60).
|
| 500 |
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|a Vita.
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| 500 |
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|a "Major Subject: Plant Breeding".
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| 530 |
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|a Issued also on microfiche from University Microfilm Inc.
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| 520 |
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|a Data from segregating populations developed from 1990-2002 at College Station (CS), TX and from 1992-2002 at Weslaco (W), TX were used in this evaluation. The early generation test (EGT) at CS utilized yield and quality parameters of the F₂ population to identify populations to advance for later generation pedigree selection. A modified EGT was used in W, F₂ and F₃ populations were evaluated for yield and fiber quality with these data used to determine advanced strain performance potential. Correlation analysis was used to determine the effect of EGT on the number of advanced strains and their performance at a number of locations in central and south Texas. No associations (P=0.05) were found between F₂ EGT data from CS and the number of advanced strains selected from each population for lint yield, lint percent, fiber elongation, and uniformity index. At W, F₂ yield data were associated (P[<]0.08) with the number of selections through the F₆ generation, but there were no associations of F₂ fiber properties and the number of strains selected. However, when F₃ EGT data from W were used, associations (P[<]0.10) were found between fiber length, fiber strength, and uniformity index and the number of advanced strains selected. Correlations between EGT yield and advanced stain performance trials did not support EGT at CS, however, fiber properties of F₂ populations were significantly associated with advanced strain fiber properties. At W, EGT lint yield data did correlate with performance trial data, thereby supporting the use of EGT where lint yield was the primary selection criteria. Early generation test data can provide the breeder with useful information relative to lint yield, fiber length, fiber strength, and fiber elongation of advanced strains, especially when evaluated at multiple locations and well defined selection goals are observed. The necessity of multiple locations and years probably reflects genotype by environment variation.
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| 650 |
|
4 |
|a Major plant breeding.
|
| 856 |
4 |
1 |
|u http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=765157971&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD
|t 0
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| 948 |
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|a cataloged
|b h
|c 2004/8/20
|d c
|e eneff
|f 3:28:38 pm
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| 994 |
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|a E0
|b TXA
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| 999 |
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|a MARS
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| 999 |
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|i 1ef4e326-4782-3592-a6ad-ae9c02696e64
|t 0
|
| 952 |
f |
f |
|p noncirc
|a Texas A&M University
|b College Station
|c Cushing Memorial Library & Archives
|s cush tdrm
|d Cushing: Theses & Dissertations Microforms (Does not check out)
|t 0
|e 2003 Dissertation J654
|h Other scheme
|i unmediated -- volume
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| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|s www_evans
|d Available Online
|t 0
|e 2003 Dissertation J654
|h Other scheme
|
| 998 |
f |
f |
|a 2003 Dissertation J654
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|l Cushing: Theses & Dissertations Microforms (Does not check out)
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f |
|a 2003 Dissertation J654
|t 0
|l Available Online
|