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Genetic Analysis for Stalk Lodging Resistance in Narrow‐Base Maize Synthetic Population ZPS14
Author(s) -
Djordjevic Jovan S.,
Ivanovic Mile R.
Publication year - 1996
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1996.0011183x0036000400016x
Subject(s) - stalk , biology , agronomy , population , path coefficient , yield (engineering) , path analysis (statistics) , grain yield , grain quality , horticulture , mathematics , materials science , statistics , demography , sociology , metallurgy
Stalk lodging resistance and grain yield are the result of interactions of many traits expressed during maize ( Zea mays L.) development. Determination of which traits influence stalk lodging resistance and grain yield might improve breeding program efficiency. The main objective of this study was to identify stalk traits that might relate to stalk lodging and grain yield, so that they can be selected as correlated traits for improving both grain yield and stalk quality. For this investigation, S 1 progenies were randomly derived from the Yugoslavian maize synthetic population ZPS14. Correlations and path coefficient analysis showed stalk water content had the greatest impact on stalk lodging resistance and grain yield. Genotypic correlations ( r g ) revealed that stalk water content had a negative and significant influence on both percentage of lodged plants ( r g = – 0.46*) and grain yield ( r g = – 0.42*). Thus, improvement in grain yield and stalk lodging would be not expected from selection for stalk water content. However, a small number of S 1 families with high stalk water content and above average grain yield were identified, suggesting some progress could be made in improving both traits simultaneously if the breeding population was large. A significant genotypic relationship was not found for grain yield and stalk lodging resistance ( r g = 0.04). As shown by path analysis, direct effects of stalk lodging on grain yield were small and nonsignificant ( P 1.2 = 0.003). Breeding for better stalk quality, thus, will not affect future progress of selection for grain yield.