Additive genetic variance for stem strength in field pea (Pisum sativum)

C. P. Beeck; J. Wroth; W. A. Cowling

doi:10.1071/ar07069

journal article Jan 14, 2008

Additive genetic variance for stem strength in field pea (Pisum sativum)

C. P. Beeck J. Wroth W. A. Cowling

Crop & Pasture Science Vol. 59 No. 1 pp. 80-85 · CSIRO Publishing

View at Publisher Save 10.1071/ar07069

Abstract

Weak stem strength in field pea (Pisum sativum) is a major restriction to yield, seed quality and ease of harvest. Three aspects of stem strength: load at breaking point, flexion and compressed stem thickness, showed substantial genetic variation among a diverse range of six parents including modern cultivars, landrace accessions, and interspecific progeny. Diallel analysis of parents and F1 progeny was conducted using a simple additive-dominance model, which was adequate for load and compressed stem thickness. There were significant additive genetic effects for load and compressed stem thickness with no evidence of dominance or maternal effects, and also significant additive genetic effects for flexion which was subject to more complex genetic control. Valuable alleles for these stem strength traits were present in commercial cultivars and landrace types of field pea. Efficient and practical breeding for improved stem strength will involve several recurrent selection cycles with moderate selection pressure for compressed stem thickness in early generations, followed by verification of improvements in lodging resistance in subsequent field trials. Compressed stem thickness is relatively easy to measure on individual plants in the field and is closely associated with load.

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Details

Published: Jan 14, 2008
Vol/Issue: 59(1)
Pages: 80-85
License: View

Authors

C

C. P. Beeck

ASchool of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.; CCorresponding author. Email: cbeeck@cyllene.uwa.edu.au

J

J. Wroth

ASchool of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.; BCanola Breeders Western Australia Pty Ltd, 15/219 Canning Highway, South Perth, WA 6151, Australia.

W

W. A. Cowling

ASchool of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.; BCanola Breeders Western Australia Pty Ltd, 15/219 Canning Highway, South Perth, WA 6151, Australia.

Cite This Article

C. P. Beeck, J. Wroth, W. A. Cowling (2008). Additive genetic variance for stem strength in field pea (Pisum sativum). Crop & Pasture Science, 59(1), 80-85. https://doi.org/10.1071/ar07069

Additive genetic variance for stem strength in field pea (Pisum sativum)

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