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| 001 |
in00000081352 |
| 005 |
20220104090726.0 |
| 008 |
820730s1981 xx a bm 000 0 eng d |
| 035 |
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|9 AAJ7174AM
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| 035 |
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|a (OCoLC)08646332
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| 035 |
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|a (OCoLC)8646332
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| 035 |
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|a (OCoLC)ocm08646332
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| 040 |
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|a TXA
|b eng
|c TXA
|d OCLCQ
|d OCLCF
|d OCLCO
|d OCLCQ
|d TXA
|d UtOrBLW
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| 049 |
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|a TXAM
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| 100 |
1 |
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|a Meckenstock, Dan Herman.
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| 245 |
1 |
0 |
|a Characterization of caryopsis development in Sorghum bicolor (L.) Moench.
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| 264 |
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1 |
|c 1981.
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| 300 |
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|a xi, 99 leaves :
|b illustrations ;
|c 29 cm
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| 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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| 500 |
|
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|a "Major subject: Plant Breeding."
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| 500 |
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|a Typescript (photocopy).
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| 500 |
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|a Vita.
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| 502 |
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|b Ph. D. in Philosophy
|c Texas A & M University
|d 1981
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| 504 |
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|a Includes bibliographical references (leaves 78-87).
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| 520 |
3 |
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|a Sorghum bicolor (L.) Moench kernel fresh weight accumulation (FWA) and dry matter accumulation (DMA) were modeled in two experiments. Experiment I (1977, 1978) studied different endosperm types while Experiment II (1979, 1980) studied selected temperate and tropically adapted (TA) lines and their hybrids. A logistic equation was used to model DMA. Endosperm types differed in ultimate kernel mass (UKM), whereas hybrid UKM was intermediate to parents. The year with warmest temperature in each experiment had shorter duration of DMA, hence smaller UKM. Corneous endosperm showed no UKM variation over two diverse environments. Heterosis was not manifested in either rate or duration of DMA. Rate of DMA was highest in RTx415 (2.71 mg/k/day). Hybrid DMA rates were intermediate to parents. Duration of DMA was longest for RTx430 which accounted for its larger UKM. Hybrids were equivalent to parents (except RTx430) for duration of DMA. Longer duration of RTx430 was not transmitted to F(,1) hybrids. Variation in duration was not observed among cultivars in warmer years. Varieties with smaller ovaries had longer lag periods prior to initiation of DMA. A cubic spline equation was used to model FWA. Variety ranking for maximum fresh weight was consistent with that of UKM with exception to waxy and sugary endosperm types which had higher fresh weights than expected for their relative UKM. This indicated more kernel water was associated with these two types. In warmer years, cessation of DMA occurred as early as peak fresh weight, thus inducing physiological maturity of (99% UKM) at higher grain moisture. However, corneous endosperm was an exception, continuing DMA after maximum fresh weight was reached. This accounted for its stable UKM over years. Rate of FWA was greater for hybrids than parents, particularly for TA hybrids in the warmest year. This was the only heterotic response observed for kernel size and may partially account for the yield advantage of TA hybrids in warmer semi-arid climates. Maximum rate of water loss from the kernel occurred after 99% of UKM was reached. Hybrids lost water at slower rates than parents. These data support previous findings in that environmental effects were greatest for duration of DMA, not rate of DMA. Also, hybrid vigor was not manifested in the yield component kernel size.
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| 650 |
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0 |
|a Sorghum.
|0 http://id.loc.gov/authorities/subjects/sh85125316
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| 650 |
|
4 |
|a Plant Breeding.
|
| 655 |
|
7 |
|a Academic theses.
|2 lcgft
|0 http://id.loc.gov/authorities/genreForms/gf2014026039
|
| 700 |
1 |
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|a Gbur, Ed,
|e degree committee member.
|
| 700 |
1 |
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|a Miller, Fred,
|e degree supervisor.
|0 http://id.loc.gov/authorities/names/n82007899
|
| 700 |
1 |
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|a Newton, Ron,
|e degree committee member.
|0 http://id.loc.gov/authorities/names/no2016024390
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| 700 |
1 |
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|a Rooney, Lloyd,
|e degree committee member.
|
| 700 |
1 |
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|a Rosenow, Darrell,
|e degree committee member.
|
| 710 |
2 |
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|a Texas A & M University,
|e degree granting institution.
|0 http://id.loc.gov/authorities/names/n80125885
|
| 856 |
4 |
1 |
|u http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=749776651&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD
|z Link to ProQuest Copy
|t 0
|
| 856 |
4 |
1 |
|u https://hdl.handle.net/1969.1/DISSERTATIONS-90837
|z Link to OAKTrust copy
|t 0
|
| 994 |
|
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|a C0
|b TXA
|
| 999 |
f |
f |
|s 63a07aad-32cc-3396-9bc8-415f465469c8
|i 5fa190d3-c088-3b75-9db2-175dd17cf551
|t 0
|
| 952 |
f |
f |
|p noncirc
|a Texas A&M University
|b J.J. Pickle Campus
|c High Density Repository
|s HDR
|d Remote Storage
|t 0
|e 1981 Dissertation M487
|h Other scheme
|i unmediated -- volume
|m A14841002547
|
| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|s www_evans
|d Available Online
|t 0
|e 1981 Dissertation M487
|h Other scheme
|
| 998 |
f |
f |
|a 1981 Dissertation M487
|t 0
|l Remote Storage
|
| 998 |
f |
f |
|a 1981 Dissertation M487
|t 0
|l Available Online
|