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The Journal of Heredity 1999:90(5)
© 1999 The American Genetic Association 90:550-553

Brief communication. Inheritance of growth habit-related attributes in red clover (Trifolium pratense L.)

H Mirzaie-Nodoushan1, IL Gordon2, and WB Rumball3

1Research Institute of Forests and Rangelands, PO Box 13185-116, Ministry of Jahade Sazandegi, Tehran, Iran 2Massey University, USA 3Grassland, Agresearch, Palmerston North, New Zealand

There are two divergent types of red clover, prostrate and erect. Prostrateness of the first type may be helpful in changing the architecture of commercial cultivars to increase their persistence. Generation mean experiments were carried out to investigate the function and number of genes controlling the two growth habit-related attributes, prostrateness and stem thickness, in red clover. To achieve these estimates, two pairs of parent plants (one erect and one prostrate in each pair) were used to produce F1, F2, BC1, and BC2 populations. Three-parameter, six-parameter, and best-fit models were presented for each attribute. Prostrateness was partially dominant to erectness. Thick stems were partially to completely dominant to thin stems. There was strong evidence for dominance x dominance epistasis controlling prostrateness and additive x additive epistasis controlling stem thickness. Both characters seemed to be controlled by few genes.


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