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CORRELATION AND PATH ANALYSIS OF GRAIN YIELD AND MORPHOLOGICAL TRAITS
IN TEST–CROSS POPULATIONS OF MAIZE
ZORANA
SRECKOV1, ALEKSANDRA NASTASIC2, JAN BOCANSKI1,
IVICA DJALOVIC2, MIRJANA
VUKOSAVLJEV3
AND BOJAN JOCKOVIC2
Abstract:
One of the goals of this paper was to determine correlation between
grain yield, like the most important agronomic trait, and traits of the
plant and ear that are influencing on the grain yield, in two test–cross
populations, which are formed by crossing progenies of NSU1
population after 17 cycles of phenotypic recurrent selection and two
testers, 568/II NS and B73. At 568/II NS testcrosses, grain yield had
the highest value of genotypic coefficient of correlations with kernel
row number. In second studied population the highest value of
coefficient of correlations also was found between grain yield and
kernel row number, but that relation was negative.
Path
coefficient
analysis
provides more information among variables than do correlation
coefficients. Because of that goal of this study also was founding the
direct and indirect effects of morphological traits on grain yield.
Desirable, high significant influence on grain yield, in path
coefficient analysis, was found for ear height, in both studied
populations. Plant height, in both testcross populations, kernel row
number and oil content, at B73 testcrosses, has high significant
undesirable effect on grain yield.
1Faculty
of Agriculture, Novi Sad, Serbia
2Institute
of Field and Vegetable Crops, Novi Sad, Serbia
3WUR,
Wageningen, Netherlands
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