GREEN SEED COAT COLOUR RETENTION IN LENTIL - University ...

Sutherland in 2005 produced the most desirable green lentil of any site for
all years (Table 4.10). Elrose in 2006 had the second most desirable lentil colour
and was harvested prior to any fall precipitation in 2006. Elrose in 2005 had the
least desirable green lentil colour. The lentils at this site stayed in the field longer
after harvest maturity than any other site and received some fall precipitation. From
Table 4.3 the length of time for desiccation until harvest can be calculated.
Comparing this time length to mean index scores from each site (Table 4.6) raises
the possibility that a longer length of time between desiccation and harvest
increased the chance of poorer quality lentil samples. In both 2005 and 2006 the
site that had the longest time between desiccation and harvest produced the least
desirable set of lentil samples.
Regression analysis was done using available weather data and the index
scores from all locations over the two years. They included total rainfall in the
growing season, rainfall 30 days prior to harvest, and growing degree days. All of
the correlations were not significant with very low R 2 values (data not shown).
From the weather data available it was not possible to predict which location would
produce the most desired green lentil.
Table 4.12 depicts how changes in the experimental setup will change the
estimate of broad sense heritability. Equation 4.2 was used to calculate the
heritabilities. The number of locations and years has more effect than the number
of replicates. When resources are limiting it appears the best combinations will be
several locations, multiple years if possible, and at least two replicates. It also
shows how fluid the heritability estimate is depending on the experimental regime
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