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You searched for: Author "Schoper, J." Remove constraint Author: "Schoper, J." Journal Crop science Remove constraint Journal: Crop science Subject Zea mays Remove constraint Subject: Zea mays
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1. Maize Pollen Longevity and Distance Isolation Requirements for Effective Pollen Control

Author:
Schoper, J. B.,   et al.   ; Luna V., S.; Figueroa M., J.; Baltazar M., B.; Gomez L., R.; Townsend, R.;     Show all 6 Authors
Source:
Crop science 2001 v.41 no.5 pp. 1551-1557
ISSN:
0011-183X
Subject:
Zea mays; corn; dehiscence; gene flow; leaves; longevity; planting; pollen; pollen flow; pollen viability; pollinators; seed set; solar radiation; water potential; wind speed
Abstract:
... Pollen is an important vector of gene flow in maize (Zea mays L.). Experiments were conducted to investigate the duration of pollen viability and the effectiveness of isolation distance for controlling gene flow. Pollen longevity was tested by collecting pollen at dehiscence and exposing it in a thin layer in the open air and sunshine for prescribed time periods before assessing pollen viability b ...
DOI:
10.2135/cropsci2001.4151551x

2. Pollen Control During Transgenic Hybrid Maize Development in Mexico

Author:
Schoper, J.,   et al.   ; Garcia C., M.; Figueroa M., J.; Gomez L., R.; Townsend, R.;     Show all 5 Authors
Source:
Crop science 1998 v.38 no.6 pp. 1597-1602
ISSN:
0011-183X
Subject:
Zea mays; plant breeding; recombinant DNA; seeds; landraces; transgenic plants; gene flow; gene expression; inbred lines; color; wild relatives; pollination; females; Mexico
Abstract:
... Pollen containment may be necessary to prevent the dissemination of novel genes from transgenic crops into sexually compatible land races or wild relatives in locations where these are grown or occur naturally in the same vicinity. Routine maize (Zea mays L.) breeding activities employ controlled pollinations and are sometimes done in areas where land races or wild relatives are known to occur. Th ...
DOI:
10.2135/cropsci1998.0011183X00380060031x

3. Pollen Viability, Pollen Shedding, and Combining Ability for Tassel Heat Tolerance in Maize

Author:
Schoper, J. B.,   et al.   ; Lambert, R. J.; Vasilas, B. L.;     Show all 3 Authors
Source:
Crop science 1987 v.27 no.1 pp. 27-31
ISSN:
0011-183X
Subject:
Zea mays; diallel analysis; temperature; heat stress; heat tolerance; pollen; inbred lines; pollen germination; general combining ability; specific combining ability
Abstract:
... High temperatures during maize (Zea mays L.) pollination limit kernel number. Knowledge is limited on the effect of heat stress on both pollen viability and tassel shedding characteristics or of possible heat tolerance sources and testers. The purpose of this research was to determine the tassel response to heat stress, as measured by in vitro pollen viability and shedding characteristics, and the ...
DOI:
10.2135/cropsci1987.0011183X002700010007x

4. Maize Pollen Viability and Ear Receptivity under Water and High Temperature Stress

Author:
Schoper, J. B.,   et al.   ; Lambert, R. J.; Vasilas, B. L.;     Show all 3 Authors
Source:
Crop science 1986 v.26 no.5 pp. 1029-1033
ISSN:
0011-183X
Subject:
Zea mays; ears; water stress; heat stress; seeds; drought; genetic variation; genotype; seed set
Abstract:
... Pollen viability and ear receptivity may be important determinants of maize (Zea mays L.) seed set under drought and high temperature conditions. Little quantitative information is available concerning the influence of water and heat stress on pollen viability, as determined with seed-set-limiting pollen amounts, or ear receptivity. The purpose of this investigation was to determine the effect of ...
DOI:
10.2135/cropsci1986.0011183X002600050038x