Original scientific paper

CORRELATIONS AMONG AGRONOMIC TRAITS IN FAOSYNFR1B MAIZE POPULATION

I. Buhiniček ; Bc Institute for Breeding and Production of Field Crops, Zagreb
B. Palaveršić ; Bc Institute for Breeding and Production of Field Crops, Zagreb
I. Brkić ; Agricultural Institute Osijek
H. Šarčević ; Faculty of Agriculture University of Zagreb

Abstract

Information on correlations among different traits in maize could help plant breeders to choose the most suitable selection procedure. The aim of this study was to estimate the correlation among different agronomic traits during the second cycle of recurrent selection in FAOSYNFR1B maize population. In 1995 the selection trials with 167 S1 progenies as well as with their 167 corresponding testcrosses with inbred line BcA632N were set up as 13x13 incomplete block design at three locations. On average, more significant correlations among studied traits were found in the trials including S1 progenies than in those including testcrosses. Most correlations ranged from very weak (r= 0.15*) to intermediate (r= 0.49**). The highest correlations at all locations for both S1 progenies and testcrosses were between pollen shed and silking (r= 0.85** to r= 0.96**), and between ear and plant height (r= 0.72** to r= 0.81**). The correlation for stalk rot between S1 progenies and testcrosses ranged from weak (r= 0.34**) to intermediate (r= 0.40**). The correlations between S1 progenies and testcrosses for grain yield were not significant at all locations. Generally, less significant correlations among different locations for the same trait were found in testcrosses than in S1 progenies. Thus it can be concluded that the traits in S1 progenies varied to the lower extent with the environment compared to the testcrosses. This allowed a better estimate of S1 progeny performances than testcross performances for traits under selection.

Keywords

maize; recurrent selection; phenotypic correlations; S1 progenies; testcrosses

Hrčak ID:

22423

URI

https://hrcak.srce.hr/22423

Publication date:

12.3.2008.

Article data in other languages: croatian

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