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DNA markers linked to yield, yield components, and morphological traits in autotetraploid lucerne (Medicago sativa L.)

Musial, J.M. and Lowe, K.F. and Mackie, J.M. and Aitken, K.S. and Irwin, J.A.G. (2006) DNA markers linked to yield, yield components, and morphological traits in autotetraploid lucerne (Medicago sativa L.). Australian Journal of Agricultural Research, 57 (7). pp. 801-810.

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Article Link(s): http://dx.doi.org/10.1071/AR05390

Publisher URL: http://www.publish.csiro.au

Abstract

We have mapped and identified DNA markers linked to morphology, yield, and yield components of lucerne, using a backcross population derived from winter-active parents. The high-yielding and recurrent parent, D, produced individual markers that accounted for up to 18% of total yield over 6 harvests, at Gatton, south-eastern Queensland. The same marker, AC/TT8, was consistently identified at each individual harvest, and in individual harvests accounted for up to 26% of the phenotypic variation for yield. This marker was located in linkage group 2 of the D map, and several other markers positively associated with yield were consistently identified in this linkage group. Similarly, markers negatively associated with yield were consistently identified in the W116 map, W116 being the low-yielding parent. Highly significant positive correlations were observed between total yield and yield for harvests 1-6, and between total yield and stem length, tiller number, leaf yield/plant, leaf yield/5 stems, stem yield/plant, and stem yield/5 stems. Highly significant QTL were located for all these characters as well as for leaf shape and pubescence.

Item Type:Article
Corporate Creators:Animal Science
Additional Information:Reproduced with permission from © CSIRO Publishing. Access to published version may be available via Publisher’s website.
Keywords:Alfalfa; non-dormant.
Subjects:Science > Biology > Genetics
Plant culture > Field crops > Forage crops. Feed crops
Deposited On:02 Feb 2009 01:59
Last Modified:15 Mar 2011 00:44

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