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oai:www.ideals.illinois.edu:2142/21881 2023-07-10 col_2142_5131 col_2142_14798 com_2142_5130 com_2142_686 com_2142_397

Juvik, John A. Meyer, Annette Carol 2011-05-07T13:22:02Z 2011-05-07T13:22:02Z 10000-01-01 1995 Sweet corn genotypes containing the shrunken2 (sh2) endosperm mutation are associated with reduced emergence and poor seedling vigor. Shrunken2 genotypes with known differences for field emergence and vigor were used to investigate the contribution of seedling cell division to emergence and seedling growth. Variation among genotypes was observed for all of the cell division cycle phases which include G1, S, and G2. The S phase, when cells are undergoing DNA replication, showed the closest association to seedling growth. Inbred lines homozygous for starchy (Su1) endosperm displayed a significantly higher proportion of nuclei in the S phase than the same inbred homozygous for the sh2 endosperm mutation. Among all the genotypes tested, the proportion of nuclei in the S phase was positively correlated with field emergence and seedling vigor. Variation was observed among sh2 genotypes for the rate of cell division in seedling shoots, which was measured by a method using nitrogen-15 to label DNA. Rates of DNA replication during the S phase in six to nine day old sh2 sweet corn seedlings were highly and positively correlated with field emergence and seedling growth rates. Made available in DSpace on 2011-05-07T13:22:02Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9522151.pdf: 4358082 bytes, checksum: 73c160800ea3f67a09c306aaf55b4d12 (MD5) Previous issue date: 1995 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:53:50Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:24:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9522151 (UMI)AAI9522151 http://hdl.handle.net/2142/21881 eng Copyright 1995 Meyer, Annette Carol Agriculture, Agronomy Biology, Cell Cell cycle parameters and sweet corn emergence and seedling vigor text Crop Sciences Crop Sciences University of Illinois at Urbana-Champaign Dissertation Ph.D.