Evaluation of breeding value of inbred lines of maize on the basis of multitrait analysis

Henryk Bujak

henryk.bujak@upwr.edu.pl
Katedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza we Wrocławiu (Poland)

Stanisław Jedyński

Katedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza we Wrocławiu (Poland)

Jan Kaczmarek

Katedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza we Wrocławiu (Poland)

Cecylia Karwowska

Hodowla Roślin Rolniczych „Nasiona Kobierzyc” Sp. z o.o. (Poland)

Zbigniew Kurczych

Hodowla Roślin Rolniczych „Nasiona Kobierzyc” Sp. z o.o. (Poland)

Józef Adamaczyk

Hodowla Roślin Smolice Sp. z o.o. (Poland)

Abstract

Forty eight maize hybrids obtained by crossing of six lines with eight flint testers were sown in a square lattice with two replications at two locations (Kobierzyce, Smolice). Statistical analyses were performed according to the computer program SERGEN. Indices expressing crossing potential were calculated for all lines and testers. Significant GCA effects were estimated for plant height, ear length, no. of rows/ear and no. of seeds/ear. SCA effects were significant for no. of seeds/ear. Significant interaction of maternal GCA effects with environment was found for ear length, no. of seeds/ear and seed weight/ ear whereas GCA effects for testers were significant in the case of ear length, no. of rows/ear and seed weight/ear. Plant height, ear length and no. of rows/ear were mostly determined by additive gene action. Both additive and non-additive gene action was involved in the inheritance of no. of grains/ear. The most promising lines were 1450-9, 1470-8, 1470-12, K 154, K 182 and K 324 which showed high crossing potential. The best hybrids were 1360-5 x K 194 and 1450-9 x K154 which were characterized by high no. of seeds/ear.

Keywords:

combining ability, crossing potential, inbred lines, maize