
TY  - JOUR
A1  - Greenham, CG 
A1  - Daday, H 
T1  - Further studies on the determination of cold hardiness in <I>Trifolium repens</I> L. and <I>Medicago sativa</I> L.
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1960
VL  - 11
IS  - 1
SP  - 1
EP  - 15
KW  - 
UR  - https://doi.org/10.1071/AR9600001 
N2  - This paper deals with probe measurements of low frequency resistance (RLF), high frequency resistance (RHF), and resistance index (= 100 x RLF/RHF), for the determination of cold hardiness or the injury caused by cold treatments. Populations of white clover (Trifolium repens L.) were subjected to different periods of freezing. Discrimination between treatments could be made in terms of RLF, RHF, and resistance index, though discrimination in terms of RHF is poor. The rest of the paper deals with lucerne (Medicago sativa L.). Measurements were made after a cold treatment on field plants consisting of four commercial strains and their F1 crosses, and also on F2 seedlings. RLF and the resistance index appear to be equally good predictors for the recovery of strains or of individual plants from such populations. The Appendix deals with measurements on commercial (tetraploid) plants, diploids, and colchicine-produced tetraploids. 
ER  -

