The relationships between morphological traits in maize (Zea mays L.) by linear and rank correlation coefficients

The objective of this study was to assess the relationships between ear length, ear diameter, plant height and ear setting height in maize linear Pearson correlation coefficients and Spearman’s rank correlation coefficients. The plant height and ear setting height were positively linear and rank correlated in all four years of study. The correlation coefficients, both - linear and rank, between all four traits observed in 2018 were statistically significant. Ear diameter and plant height were linear and rank correlated in 2018, however in 2015 only Pearson correlation coefficient was statistically significant between these two traits.

REFERENCES (14)

Borkowf C.B.: Computing the nonnull asymptotic variance and the asymptotic relative efficiency of Spearman’s rank correlation. Computational Statistics and Data Analysis, 2002, 39, 271-286.

Google Scholar

Grzebisz W.: System korzeniowy rośliny a żyzność gleby. Postępy Nauk Rolniczych, 1990, 4/5/6, 4-19.

Google Scholar

Jagła M., Szulc P., Ambroży-Deręgowska K., Mejza I., Kobus-Cisowska J.: Yielding of two types of maize cultivars in relation to selected agrotechnical factors. Plant Soil Environment, 2019, 65(8), 416-423.

Google Scholar

Nash D.M., Halliwell D.J.: Fertilisers and phosphorus loss from productive granzing systems. Aust. J. Soil Res., 1999, 37, 403-429.

Google Scholar

Pearson K.: Notes on regression and inheritance in the case of two parents. Proceedings of the Royal Society of London, 1895, 58, 240-242.

Google Scholar

Potarzycki J., Grzebisz W.: Dynamika uwalniania fosforu wodnorozpuszczalnego z gleb nawożonych w przeszłości gnojowicą i nawozami mineralnymi. (Eksperyment inkubacyjny). Prace Nauk. AE we Wrocławiu, Chemia, 2001, 888, 190-196.

Google Scholar

Roberts D., Kunst R.: A case against continuing use of the Spearman formula for rank-order correlation. Psychological Reports, 1990, 66, 339-349.

Google Scholar

Soper H.E., Young A.W., Cave B.M., Lee A., Pearson K.: On the distribution of the correlation coefficient in small samples. Appendix II to the papers of "Student" and R. A. Fisher. A co-operative study. Biometrika, 1917, 11(4), 328-413.

Google Scholar

Sowiński P.: Wrażliwość kukurydzy na chłód. Cz. II. System korzeniowy, regulacja funkcjonowania rośliny, perspektywy hodowli. Biuletyn IHAR, 2000, 214, 3-16.

Google Scholar

10.

Spearman C.: The proof and measurement of association between two things. American Journal of Psychology, 1904, 15(1), 72-101.

Google Scholar

11.

Szulc P., Bocianowski J., Rybus-Zając M.: Response of nitrogen nutritional indices maize leaves to different mineralorganic fertilization. Maydica, 2012, 57, 260-265.

Google Scholar

12.

Szulc P., Waligóra H., Michalski T., Rybus-Zając M., Olejarski P.: Efficiency of nitrogen fertilization based on the fertilizer application method and type of maize cultivar (Zea mays L.). Plant Soil Environ., 2016, 62(3), 135-142.

Google Scholar

13.

Uhart S.A., Andrade F.H.: Nitrogen deficiency in maize. Crop Science, 1995, 35(5), 1376-1383.

Google Scholar

14.

Withers P.J., Sharpley A.N.: Soil amendments and environmental quality. Phosphorus fertilizers. Chapter 2, 1995, 65-107.

Google Scholar

Submit your paper

Instructions for Authors

eISSN:	2719-423X
ISSN:	1642-686X