CD Skripsi
Perbandingan Respons Seleksi Dengan Intensitas Seleksi Yang Berbeda Pada 4 Populasi Half-Sib Tanaman Jagung (Zea Mays L.)
ABSTRACT
Maize (Zea mays L.) is one of strategic food commodities in Indonesia. Production improvement can be achieved through development of new varieties using mass selection in open-pollinated populations. This study aimed to determine differences between expected and actual selection response after selection with 10% and 15% intensities in 4 half-sib families of maize. The research was conducted at experimental field of Faculty of Agriculture, Riau University from January to May 2025 using randomized complete block design with 4 half-sib families as treatments replicated 4 times. Base population consisted of crosses between Pulut Uri 1 as female parent with 4 maize varieties (Pulut Uri 1, Anoman, Lamuru, and Jutawan) as male parents. Parameters observed included days to male flowering, days to female flowering, days to harvest, ear length without husk, ear weight without husk, number of kernel rows per ear, number of kernels per ear, kernel weight per ear, kernel weight per plant, and 100-kernel weight. Results showed that genetic variance components of all characters in both 10% and 15% selection intensity populations were categorized as narrow. Broad-sense heritability in 10% selection intensity population with high category was only found in days to male flowering (0.57) and days to female flowering (0.64), while 15% selection intensity population only in days to female flowering (0.54). Actual response values from four families in both 10% and 15% selection intensity populations tended to decrease compared to expected values from base population, except for days to harvest. Comparison of both populations showed relatively similar response patterns. Variability of all observed characters was relatively narrow for all four half-sib families in both populations.
Keywords : maize, half-sib, selection intensity, heritability, selection response
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