Heritability and genetic advance for activity of lipoxygenase and yield components traits in soybean Glycine max (L.) Merr.

Abstract

The research was conducted on 146 RILs population, using a cross between ‘Nakhon Sawan1’
x ‘AGS129’ to estimate genetic variability, heritability and genetic advance for activity of lipoxygenase and
yield components traits in soybean. The 146 RILs and parents were planted in a randomized complete
block design (RCBD) with two replications. Data of agronomic traits were collected, such as days to
flowering, plant height, no. of seeds/pod, no. of pods/plant and no. of seeds/plant. The specific activity of
lipoxygenase was measured in soybean seeds using spectrophotometer at 234 nm. The results showed
that lipoxygenase activity trait has high genotypic coefficient of variation (GCV = 23.053%) and moderate
broad-sense heritability (Hb
2 = 42.774%). These results indicated large genetic effects on the expression
of the trait. In addition, no. of seeds/plant and no. of pods/plant trait have high genotypic coefficient of
variation and high broad-sense heritability. Also, no. of seeds/plant trait has the highest genetic advance

in percent of the mean (GAM = 123.359%). These results indicated that yield components traits were
controlled by additive gene effects. Our results may be useful in breeding programs for selection
lipoxygenase activity trait and yield components traits in soybean.