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| 001 |
in00001074921 |
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20200904152557.0 |
| 008 |
921001s1991 xx a bm 000 0 eng d |
| 035 |
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|a (OCoLC)ocm26708028
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| 035 |
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|9 AFR7130AM
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| 040 |
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|a TXA
|b eng
|c TXA
|d OCLCQ
|d OCLCO
|d OCLCQ
|d TXA
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| 035 |
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|a (OCoLC)26708028
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| 049 |
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|a TXAM
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| 099 |
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|a 1991
|a Dissertation
|a M465
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| 100 |
1 |
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|a Maxwell, Robert Vern,
|d 1958-
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| 245 |
1 |
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|a Inheritance and descriptive features of the intermediate-leaf character in cucumber /
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| 264 |
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|c 1991.
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| 300 |
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|a xiv, 125 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 Typescript (photocopy).
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| 502 |
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|b Ph. D.
|c Texas A & M University
|d 1991
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| 500 |
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|a Vita.
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| 504 |
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|a Includes bibliographical references.
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| 500 |
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|a "Major subject: Horticulture."
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| 520 |
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|a The increasing expense of hand labor has directed current attention toward development of new pickling cucumber cultivars adapted for mechanical harvest. A new cucumber phenotype, called 'Intermediate-leaf', possesses the advantage of heavy concentrated fruit sets of uniform maturity needed for adaptation to mechanical harvest. An evaluation of descriptive features differentiating intermediate-leaf from other plant morphotypes and discerning the mode of inheritance of this character are important for using this trait in future cultivar improvement. Eight homogeneous populations within three morphotype classes (normal-leaf, intermediate-leaf, and little-leaf) were used for comparison of several morphological and physiological parameters. Inheritance of leaf size was determined using families of F1, F2, and BC generations of little-leaf x normal-leaf parents. Morphologically, intermediate-leaf exhibits the same prolific branching characteristics of little-leaf, but has leaves of slightly larger size and is approximately 10 days earlier in maturity. Yields, both from intermediate-leaf lines and hybrids of intermediate-leaf x normal-leaf cucumbers, are consistently higher than other morphotypes. Total leaf area and net photosynthetic rates per unit leaf area were not significantly different between morphotypes, but a trend for small leaved types to direct dry weight accumulation in reproductive rather than vegetative tissue was observed. Leaf size is controlled by a single incompletely dominant gene with heterozygotes expressing slightly smaller size than the homozygous dominant normal types. In the absence of the dominant allele, modifying genes influence the final leaf size, providing a wide variation of small leaf size. Of the fifteen different enzyme systems evaluated, only 6-phosphogluconate dehydrogenase expressed variation between morphotypes. The little-leaf lines display a different banding pattern than the three normal-leaf cultivars evaluated.
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| 650 |
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0 |
|a Cucumbers
|x Genetics.
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| 650 |
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0 |
|a Cucumbers
|x Morphology.
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| 650 |
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0 |
|a Cucumbers
|x Varieties
|x Testing.
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| 650 |
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4 |
|a Major horticulture.
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| 655 |
|
7 |
|a Academic theses
|2 lcgft
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| 700 |
1 |
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|a Pike, Leonard M.,
|e degree supervisor.
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| 700 |
1 |
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|a Bender, David,
|e degree committee member.
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| 700 |
1 |
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|a Miller, Marvin E.,
|e degree committee member.
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| 700 |
1 |
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|a Villalon, Benigno,
|e degree committee member.
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| 710 |
2 |
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|a Texas A & M University,
|e degree granting institution.
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| 856 |
4 |
1 |
|x http://hdl.handle.net/1969.1/DISSERTATIONS-1250372
|z Link to OAKTrust copy
|t 0
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| 856 |
4 |
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|u http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=744883171&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD
|z Link to OAKTrust copy
|t 0
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| 994 |
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|a C0
|b TXA
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| 999 |
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|i 266c52a8-2d4f-3142-a299-7cced1543d06
|t 0
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| 952 |
f |
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|p noncirc
|a Texas A&M University
|b J.J. Pickle Campus
|c High Density Repository
|s HDR
|d Remote Storage
|t 0
|e 1991 Dissertation M465
|h Other scheme
|i unmediated -- volume
|m A14841035930
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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 1991 Dissertation M465
|h Other scheme
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| 998 |
f |
f |
|a 1991 Dissertation M465
|t 0
|l Available Online
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| 998 |
f |
f |
|a 1991 Dissertation M465
|t 0
|l Remote Storage
|