Morphological Changes in Parental Lines of Pioneer Brand Maize Hybrids in the U.S. Central Corn Belt
We observed changes over time (1930-2007) for 38 morphological characteristics by examining 78 parental inbreds of hybrids that have been used to measure genetic gain in maize (Zea mays L.) in the central Corn Belt of the United States. Fifty-eight percent of the characteristics changed as new inbre...
Saved in:
Published in | Crop science Vol. 52; no. 3; pp. 1033 - 1043 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Madison, WI
Crop Science Society of America
01.05.2012
The Crop Science Society of America, Inc |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | We observed changes over time (1930-2007) for 38 morphological characteristics by examining 78 parental inbreds of hybrids that have been used to measure genetic gain in maize (Zea mays L.) in the central Corn Belt of the United States. Fifty-eight percent of the characteristics changed as new inbreds were successively bred during this period. More recently, during the era of single-cross hybrids, changes occurred for several characteristics either at differential rates or in opposite directions, depending on whether inbreds were used as female or male parents. Founder contributions by pedigree also changed in time and according to usage as females or males in single-cross hybrids. Further conscious selection on some of these characteristics might expedite further improvements in rate of genetic gain. |
---|---|
Bibliography: | http://dx.doi.org/10.2135/cropsci2011.05.0274 All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher. |
ISSN: | 1435-0653 0011-183X 1435-0653 |
DOI: | 10.2135/cropsci2011.05.0274 |