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Estimation of the number of loci involved in the inheritance of resistance to Phytophthora palmivora (Butl.) Butl. in the leaves of Theobroma cacao L


, : Estimation of the number of loci involved in the inheritance of resistance to Phytophthora palmivora (Butl.) Butl. in the leaves of Theobroma cacao L. Plant Pathology 43(1): 73-79

Comparisons of theoretical and observed distributions indicated that resistance to necrosis caused by P. palmivora within leaf tissues of Theobroma cacao clone ICS1 was influenced by a minimum of 5 unlinked heterozygous loci.

Accession: 002373473

DOI: 10.1111/j.1365-3059.1994.tb00555.x

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Related references

Jimenez, S.-E.R.cha, H., 1969: Applicability of the spectrophotometric analysis of tissue extracts on the study of resistance of cacao (Theobroma cacao L.) to Phytophthora palmivora (Butl.) Butl

Prendergast, N.W.; Spence, J.A., 1965: A contribution to the study of the resistance of Theobroma cacao L. to Phytophthora palmivora Butl.) Butl. Two of the six varieties tested showed high resistance to Ph. palmivora. This resistance may be correlated with differences in total oxidizable phenols, potyphenoloxidase activity and rate of browning. A qualitative difference in polyphenol conten...

Prendergast, N.W.; Spence, J.A., 1967: A contribution to the study of the resistance of Theobroma cacao L. to Phytophthora palmivora (Butl.) Butl. The application of zoospores of a pod strain of P. palmivora to detached unwpunded pods of 6 cacao clones showed that 2 varieties carried high resistance to the pathogen. Subsequent investigation indicated that certain biochemical factors, viz. to...

Amponsah, J.D.; Asare Nyako, A., 1973: Glasshouse method for screening seedlings of cocoa (Theobroma cacao L.) for resistance to black pod caused by Phytophthora palmivora (Butl.) Butl. Germainated seeds of ten clones were placed after four days in solutions of varying concentrations of Ph. palmivora inoculum. Seedling mortality at eight weeks appeared to be related to susceptibility in the field, and the method shows promise for...

Babacauh, Kd, 1983: Population structure of Phytophthora palmivora (Butl.) Butl. emend. Bras. and Griff., a parasite of the cacao plant (Theobroma cacao L.). Bulletin de la Societe botanique de France: lettres botaniques30(1): 15-25

Turner, P.D., 1960: Strains of Phytophthora palmivora Butl. Butl. from Theobroma cacao L. I. Isolates from West Africa. Study of 179 isolates from ten cacao-growing countries in West Africa revealed the occurrence of three types, differing in physiological and morphological characters, sexual behaviour and geographical distribution. The three categories are respect...

Turner, P.D., 1961: Strains of Phytophthora palmivora (Butl.) Butl. from Theobroma cacao L. II. Isolates from non-African countries. Forty isolates from 14 non-African countries were compared with the West African isolates studied previously . Cultures from all of the countries, including the West African ones, were intercrossed. Almost all of the non-African isolates were sexu...

Turner, P.D.; Wharton, A.L., 1960: Leaf and stem infections of Theobroma cacao L. in West Africa, caused by Phytophthora palmivora (Butl.) Butl. This information from Ghana has been noted . Similar skmntoms have been reported from Nigeria, Fernando Po, and Cameroun . These infections are of local importance only and may be due to either of the 2 complementary strs. of the pathogen . The sy...

Hislop, E.C.; Park, P.O., 1962: Studies on the chemical control of Phytophthora palmivora (Butl.) Butl. on Theobroma cacao L. in Nigeria. III. Field trials. Two field trials of fungicides are fully described and the results discussed in III. Possible causes of the poor control obtained are considered in relation to the results of the laboratory tests; incomplete drying of the fungicide deposits and in...

Hislop, E.C.; Park, P.O., 1962: Studies on the chemical control of Phytophthora palmivora (Butl.) Butl. on Theobroma cacao L. in Nigeria. II. Persistence of fungicides on pods. Laboratory and field studies are described in II for testing the tenacity of fungicides sprayed on cacao pods by applying artificial rain in an experimental rain tower. A general relationship was established between leaching of deposits and rainfa...