TITLE:
Repeatability of Pre-Harvest Sprouting in Wheat
AUTHORS:
Eduardo Stefani Pagliosa, Valeria Carpentieri-Pipolo, Deoclécio Domingos Garbuglio, Thiago Henrique Oro, Karla Bianca de Almeida Lopes, Claudemir Zucareli
KEYWORDS:
Triticum aestivum, Rainfall Simulator, Repeatability
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.11,
May
19,
2014
ABSTRACT: This study aimed to
detect genotypic differences in the resistance to sprouting of wheat grains,
evaluate the effectiveness of different methods for inducing sprouting and
identify, using repeatability estimates, the minimum number of spikes necessary
for the adequate evaluation of the percentage of grain sprouting in the spike
in order to assist in the selection of superior genotypes in breeding programs.
Spikes from four wheat cultivars (Frontana, IPR Catuara, Quartzo and BRS 220)
were evaluated using three methods for inducing grain sprouting in the spike
(water immersion, rainfall simulation and germination chamber). To determine
the most efficient method, repeatability coefficients were estimated through
analysis of variance, principal components analysis and structural analysis
based on correlation and covariance matrices. The induction of sprouting by
immersion in water was the most effective method for indicating genotypic
differences and may be used in breeding
programs for this purpose. The repeatability method based on the components of
covariance was more efficient. A minimum of 11 spikes is required to make a
high-reliability estimate of the percentage of sprouted grains in the spike.