Rice Genomics and Genetics 2015, Vol.6, No.4, 1-5
3
phenotypic and genotypic coefficient of variation,
heritability (broad sense) and genetic advance as per
cent of mean were estimated by the formula as
suggested by Burton (1952) and Johnson et al. (1955).
The following quality traits are
2.1 Kernel Length (KL)
Ten unbroken hulled kernels with their tips intact
from each genotype were measured for their length
using Vernier Callipers. Average of length was taken
in millimeters.
2.2 Kernel breadth (KB)
Ten unbroken hulled kernels with their tips intact from
each genotype were measured for their breadth using
Vernier Callipers. Average of breadth was taken in
millimeters.
2.3 Kernel length / breadth ratio (KLBR)
The ratio between kernel length and breadth was
estimated.
2.4 Kernel length after cooking (KLAC)
Ten randomly selected whole milled rice kernels
were taken in a labelled test tube and soaked in
water for ten minutes. The tubes were placed in a
water bath maintained at boiling temperature
(100
℃
) for 20 minutes. After cooking, the cooked
kernels (intact on both ends) were measured using a
graph paper mounted in a glass frame and the
average kernel length after cooking was expressed
in millimeters.
2.5 Kernel breadth after cooking (KBAC)
Ten randomly selected whole milled rice kernels
were taken in a labelled test tube and soaked in
water for ten minutes. The tubes were placed in a
water bath maintained at boiling temperature
(100
℃
) for 20 minutes. After cooking, the cooked
kernels (intact on both ends) were measured using a
graph paper mounted in a glass frame and the
average kernel breadth after cooking was expressed
in millimeters.
2.6 Linear elongation ratio (LER)
The ratio of mean length of cooked rice to mean
length of milled rice was computed as linear
elongation ratio (Juliano and Perez, 1984).
2.7 Breadth wise expansion ratio (BER)
The ratio of mean breadth of cooked rice to mean
breadth of milled rice was computed as breadth wise
expansion ratio
The zinc and iron content were determined by using
Atomic Absorption Spectrophotometer as suggested
by Jackson (1973). All the statistical analysis was
done by using GENRES statistical software GEN
STAT 2004.
References
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5
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3
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