Diallel Analysis of Photosynthetic Traits in Maize
Capability to intercept and utilize sunlight is important in maize (Zea mays L.) for its growth and dry matter accumulation. Little research has been conducted on the combining ability of maize physiological traits related to photosynthesis, such as light saturation point (LSP), light compensation p...
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Published in | Crop science Vol. 52; no. 2; pp. 551 - 559 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Madison, WI
Crop Science Society of America
01.03.2012
The Crop Science Society of America, Inc American Society of Agronomy |
Subjects | |
Online Access | Get full text |
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Summary: | Capability to intercept and utilize sunlight is important in maize (Zea mays L.) for its growth and dry matter accumulation. Little research has been conducted on the combining ability of maize physiological traits related to photosynthesis, such as light saturation point (LSP), light compensation point (LCP), apparent quantum efficiency (AQE), maximum photosynthesis (Pmax), total protein content (PRO), and activity of phosphoenolpyruvate carboxylase (PEPC) and ribulosebisphosphate carboxylase (RuBPC). The five photosynthesis-related traits and two key enzymes were examined for their combining abilities using a six-parent diallel design. The objectives were to (i) evaluate general combining ability (GCA) and maternal (MAT) effects of the six maize lines and specific combining ability (SCA) and nonmaternal (NMAT) effects for crosses and (ii) determine if GCA effects were different among three maize heterotic groups. Results revealed that the additive gene effects were more important than nonadditive effects for LSP, LCP, Pmax, PRO, PEPC, and RuBPC. Maternal effects for LCP, PRO, and RuBPC were significant and positive for some lines, which could be used as female parents in hybrid development. Information on means of parental lines, combining ability, and heterosis values suggested that RUBPC, PEPC, and PRO might be the key traits that make the Suwan 1 heterotic group different from the Reid and non-Reid groups and should be explored fully in future hybrid maize breeding programs. |
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Bibliography: | http://dx.doi.org/10.2135/cropsci2011.06.0333 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/cropsci2011.06.0333 |