Application of index selection in maize breeding with regard to economic weights of traits
Henryk Bujak
henryk.bujak@upwr.edu.plKatedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu (Poland)
Katarzyna Dmochowska-Huba
Katedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu (Poland)
Stanisław Jedyński
Katedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu (Poland)
Jan Kaczmarek
Katedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu (Poland)
Abstract
Twenty two flint lines and 21 dent lines of maize were grown in field trials at Smolice and Kobierzyce using incomplete block design. Seeds were sown on 5 m2 plots at 75 × 18.6 cm spacing. The following characters were measured: pollen shed, silking, ear length, no. of rows/ear, no. of kernels/row, no. of kernels/ear, ear weight, cob weight, % dry matter and weight of grain/ear. The measurements of the characters were used to construct three indices: specific, foreign and general. Each index was computed with and without economic weights. In general, both variants of index gave similar rankings of the lines. After incorporating economic weights to the construction of indices the following lines were selected as the most promising: S 50668-4, K 409, S 41798-1-2-2, S 50685, S 47225A. It is concluded that using economic weights in the construction of indices gives a better characterization of inbred lines and is helpful in the choice of parents for a particular cross combination.
Supporting Agencies
Keywords:
economic weights, foreign index, general index, inbred lines, maize, specific indexReferences
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Authors
Henryk Bujakhenryk.bujak@upwr.edu.pl
Katedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu Poland
Authors
Katarzyna Dmochowska-HubaKatedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu Poland
Authors
Stanisław JedyńskiKatedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu Poland
Authors
Jan KaczmarekKatedra Hodowli Roślin i Nasiennictwa, Uniwersytet Przyrodniczy we Wrocławiu Poland
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Copyright (c) 2007 Henryk Bujak, Katarzyna Dmochowska-Huba, Stanisław Jedyński, Jan Kaczmarek
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