Abstract
Eight maize complexes and varieties representing high and low yield levels were tested for their suitability as top cross testers by comparing the performance of the crosses in relation to the combining ability of the parents estimated by diallel analysis. The discriminating ability of the testers was compared by Schumann and Bradley test. In both cases the results clearly showed that the low performing testers were better and more reliable than the high performing complexes. The utility of per se performance as an indication of general combining ability of the complexes has been discussed.
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Beard, D. F., 1940. Relative values of the selected single cross open pollinated variety as tester of inbred lines of corn (Quoted from Hull, 1947).
Compton, W. A., Gardner, C. O. and Lonnquist, J. H., 1965. Genetic variability in two open pollinated varieties of corn (Zea mays L.) and their F1 progenies. Crop Sci. 5: 505–508.
Davis, R. L., 1927. Report of the plant breeder. Puerto Rico Agri. Expt. Sta. Ann. Rept: 14–15.
Davis, R. L., 1934. Maize crossing values in second generation lines. J. Agri. Res. 48: 339–357.
Finley, K. W., 1964. Adaptation—its measurement and significance in barley breeding. Barley Genet. 1: 351–359.
Gardner, C. O., 1963. Estimates of genetic parameters in cross fertilizing plants and their implications in plant breeding. Statistical Genet. and Plt. Breeding. NAS-NRC. 982: 225–252.
Genter, C. F., 1963. Early generation progeny evaluation in corn. Proc. 18th Ann. Hybird Corn Res. Industry Conf.: 32–36.
Green, J. M., 1948. Relative value of two testers for estimating top-cross performance in segregating maize progenies. J. Amer. Soc. Agron. 40: 45–57.
Hull, F. H., 1947. Cryptic homozygous lines. J. Amer. Soc. Agron. 39: 438–439.
Keller, K. R., 1949. A comparison involving the number of and relationship between testers in evaluating inbred lines of maize. Agron. J. 41: 323–331.
Koble, A. F. and Rinke, E. H., 1963. Comparative S1 line and top-cross performance in maize. Agron. Abstracts. Amer. Soc. Agron. 83.
Lindsey, M. F., Lonnquist, J. H. and Gardner, C. O., 1962. Estimates of genetic variance in open pollinated varieties of corn belt corn. Crop Sci. 2: 105–108.
Lonnquist, J. H. and Gardner, C. O., 1961. Heterosis in intervarietal crosses of maize and its implications in breeding procedures. Crop Sci. 1: 179–183.
Raina, G. L., 1966. Combining ability studies in a diallel set of ten germplasm complexes of Zea mays L. M. Sc. thesis Punjab Agricultural University, Ludhiana. India.
Rawlings, J. O. and Thompson, D. L., 1962. Performance level as criterion for the choice of maize testers. Crop Sci. 2: 217–220.
Robinson, H. F., Cockerham, C. C. and Moll, R. H., 1960. Studies on estimation of dominance variance and effects of linkage bias. Biometrical Genet.: 171–177. New York. Pergamon Press.
Robinson, H. F., Comstock, R. E. and Harvey, P. H., 1955. Genetic variances in open pollinated varieties of corn. Genet. 40: 45–60.
Schumann, D. E. W. and Bradley, R. A., 1959. The comparison of the sensitivities of similar experiments: Model II of the analysis of variance. Biometrics. 12: 405–416.
Sprague, G. F., 1964. Estimates of genetic variation in two open pollinated varieties of maize and their reciprocal F1 hybrids. Crop Sci. 4: 332–334.
Williams, J. C., Penny, L. H. and Sprague, G. F., 1965. Full-sib and half-sib estimates of genetic variance in open pollinated variety of corn, Zea mays L. Crop Sci. 5: 125–129.
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Sharma, D., Tandon, J.P. & Batra, J.N. Effect of tester on combining ability estimates of maize germplasm complexes. Euphytica 16, 370–376 (1967). https://doi.org/10.1007/BF00028945
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DOI: https://doi.org/10.1007/BF00028945