Indian Society of Genetics & Plant Breeding

Estimation of heritability using spatial variability models: The case of lentil (Lens culinaris Medikus) trials in Syria

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Heritability is a key determinant of response to selection
and breeding efficiency, and is often estimated using data
from field trials involving simple block designs. However,
spatial variability patterns that cannot be modeled using
a classical block analysis framework have been found to
be prevalent in field trials of lentil
(Lens culinaris Medikus),
an important food legume crop worldwide. Therefore, 18
different models, each describing a different spatial pattern,
were assessed using lentil yield data from preliminary
and advanced yield trials in Syria. More often the best
models included linear trends and auto-correlated errors
in addition to the classical block effect than those based
on block effects alone. For instant, of the 31 preliminary
yield trials on seed yield, model based on complete block
and first-order autocorrelated errors along rows was found
best in eigl)t trials followed by auto-correlated errors in
rows and column dimensions in seven trials. Out of the
18 advanced yield trials, randomized complete block was
most suitable to describe the field variability in six trials
followed by complete blocks with a linear trend along
rows in three trials.

Keywords: Lentil, heritability, field trials, spatial variability


Year: 2005
Volume: 65
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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