Potential to increase yield in lucerne (Medicago sativa subsp sativa) through introgression of Medicago sativa subsp falcata into Australian adapted material

Mackie, J. M., Pepper, P. M., Lowe, K. F., Musial, J. M. and Irwin, J. A. G. (2005) Potential to increase yield in lucerne (Medicago sativa subsp sativa) through introgression of Medicago sativa subsp falcata into Australian adapted material. Australian Journal of Agricultural Research, 56 12: 1365-1372. doi:10.1071/AR05085


Author Mackie, J. M.
Pepper, P. M.
Lowe, K. F.
Musial, J. M.
Irwin, J. A. G.
Title Potential to increase yield in lucerne (Medicago sativa subsp sativa) through introgression of Medicago sativa subsp falcata into Australian adapted material
Journal name Australian Journal of Agricultural Research   Check publisher's open access policy
ISSN 0004-9409
Publication date 2005-01-01
Sub-type Article (original research)
DOI 10.1071/AR05085
Volume 56
Issue 12
Start page 1365
End page 1372
Total pages 8
Editor Jenny C Fegent (Managing Editor)
Place of publication Collingwood
Publisher CSIRO Publishing
Collection year 2005
Language eng
Subject C1
300203 Plant Improvement (Selection, Breeding and Genetic Engineering)
630502 Pasture, browse and fodder crops
Abstract The effect of interspecific heterosis in crosses between Medicago sativa subsp. sativa and M. sativa subsp. falcata was assessed. Three sativa and 3 falcata plants were crossed in a diallel design. Progeny dry matter yield and natural plant height were assessed in a replicated field experiment at Gatton, Queensland. Yield data were analysed using the method of residual maximum likelihood (REML) and Griffing's model 1. There were significant differences between the reciprocal, general combining ability (GCA), and specific combining ability (SCA) effects. As expected, S-1 populations were lower yielding than their respective intraspecific cross and falcata x falcata crosses were significantly lower yielding than sativa x sativa crosses. Some of the interspecific crosses indicated substantial SCA effects, yielding at least as well as the best sativa x sativa crosses. We have demonstrated the potential usefulness of unselected M. sativa subsp. falcata as a heterotic group in the improvement of yield in northern Australian adapted lucerne material, and discuss how it could be incorporated into future breeding to overcome the yield stagnation currently being experienced in Australian programs.
Keyword Agriculture, Multidisciplinary
Alfalfa
Plant Breeding
Winter-active
Genetic Diversity
Alfalfa Germplasms
Forage Yield
Heterosis
Improvement
Population
Queensland
Components
Cultivars
Dormancy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes DOI: 10.1071/AR05085

 
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Created: Wed, 15 Aug 2007, 17:08:26 EST