Estimates of Genetic Variation, Genetic Advance and Heritability in S1 line Population of Waxy Corn
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Abstract
The study aimed to assess genetic variation in agricultural characteristics, fresh-ear yield, and eating quality of S1 lines population of waxy corn, which is in the cycle 3 of recurrent selection. The 288 lines were split into 2 sets, 141 lines each. Three commercial varieties (SW254, Sweet White, and Big White) were used as check. The experiment was conducted using alpha-lattice design (12x12) with 2 replications at the experimental plot of Kasetsart University, Kamphaeng Saen Campus from June to October 2021. It showed statistically significant differences for green and white weight, ear length and number of kernel rows. Estimates of GCV and PCV ranged between 5.6% and 28.9%. The highest GCV and PCV value were found particularly for green and white weight and ear height with moderate heritability values were also found for both traits and their genetic advance over mean (GAM) was ranged 8.0-19.0%. Means of fresh-ear yield and ear length of the selected S1 lines trends to be better than that of population and check mean. It indicates that existence of genetic variation in the population should be exploited in future breeding for fresh-ear yield.
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