Phenotypic and genetic relationships between yield components in maize View Full Text


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Article Info

DATE

1981-12

AUTHORS

Ercole Ottaviano, Alessandro Camussi

ABSTRACT

Physiological components of kernel development — LAG period, effective filling period duration (EFPD) and grain filling rate (GFR) — ear moisture release (ΔU), ear size (row number and kernels per row), days from emergence to silking and number of leaves, were examinated on 45 F1 hybrids (10×10 diallel cross) in order to study their genetic relationships with yield. Combining ability analysis revealed that all trait variability derived mainly from g.c.a. effects. LAG period and EFPD were the traits most affected by genotype-environment interaction.Covariation analysis (path method) based on mean phenotypic values and on g.c.a. effects yielded similar information. It is shown that GFR and EFPD are both related to plant yield, but GFR made the most important contribution. On the contrary, a significant relationship between yield and LAG was not detected. Ear size components were also positively related to yield and had negative effects on GFR. These results indicate that, for our material, the dry matter accumulation rate is the main limiting factor of yield.Considering s.c.a. effects, kernel number per row made the most important contribution. More... »

PAGES

601-609

References to SciGraph publications

  • 1975-11. An ideotype of maize in EUPHYTICA
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf00038787

    DOI

    http://dx.doi.org/10.1007/bf00038787

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1035214499


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