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Efendi, Roy
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SIDIK LINTAS DALAM PENENTUAN KARAKTER SELEKSI JAGUNG TOLERAN CEKAMAN KEKERINGAN Efendi, Roy; Aqil, Muhammad; Makalau, Andi Takdir; Azrai, Muhammad
Informatika Pertanian Vol 25, No 2 (2016): Desember 2016
Publisher : Sekretariat Badan Penelitian dan Pengembangan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (571.788 KB) | DOI: 10.21082/ip.v25n2.2016.p171-180

Abstract

Information on characteristics related to drought tolerance is particularly important for improving hybrid maize yield. The present study was conducted with 62 genotypes involving tolerant, moderate, susceptible and very susceptible, for post flowering drought tolerance of hybrid maize. An experiment was conducted to determine the characteristics association between grain yield and its components and their direct and indirect effects to the yield. The research was arranged in a randomized completed block design with three replications. Drought stress treatment was started from flowering (50 days after planting, dap) until milk-dough stage (80 dap). The result indicated significant and positive association of grain yield with plant height, ear position height, stalk diameter, leaf area, leaf angle, the percentage of leaf senescence, leaves rolling score, ear length, ear diameter, number of grain/ear and shelling percentage were correlated with the yield under drought stress. Grain yield was strongly correlated with plant height, leaf area, ear length, ear diameter, and shelling percentage. Indirect effect on grain yield under drought conditions were found for the following parameters: stalk diameter, leaf angle, percentage of leaf senescence, leaf rolling scores and number of seeds/ear.
Keragaman Genetik dan Penampilan Jagung Hibrida Silang Puncak pada Kondisi Cekaman Kekeringan Azrai, Muhammad; Efendi, Roy; Suwarti, Suwarti; Praptana, R. Heru
Jurnal Penelitian Pertanian Tanaman Pangan Vol 35, No 3 (2016): Desember 2016
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (172.741 KB) | DOI: 10.21082/jpptp.v35n3.2016.p199-208

Abstract

Wide diversity genetic materials is required to develop new superior drought tolerant maize. The objective of this experiments were to obtain genetic diversity information,heritability value and to find out yield character performance, yield component and Agronomic traits performance of top cross maize severe drought stress. One hundred and fifty maize  genotypes of top cross selection  and four hybrid maize as check varieties, were tested to obtained the Agronomic trait performance in Probolinggo of East Java and Gowa district of South Sulawesi in dry season of 2013. Factorial Randomized block Design with two replication was used in this experiment. Each hybrid grown one plant per hole in two rows of 5 m length plot,  placed in 70 cm between row space and 20 cm between row. The result of this research showed that top cross hybrid had different significantly response under drought stress, eventhough genotypes had low genetic diversity. Heritability probability of broad sense of silking, ear row number, and shelling percentage were high, wherease in the mid heritability showed traits of 50% anthesis, anthesis-silking interval, plant height, ear height, weight and ear performance, ear length, 1000 seeds weight and yield. The 20 best hybrids according to the highest grain yield, were 17 genotypes which had good combining ability with P21, 2  genotypes had good combining ability with Bima 11 and only one genotype had good combining ability with both of top cross parent (P21 and Bima 11). The yield rates of 20 top cross hybrids in Probolinggo spreaded at 4.8 t/ha – 6.7 t/ha significantly higher than tester variety, wherease yield rates in Gowa  ranged at 4.5 t/ha – 6.7 t/ha and only 4 tested hybrids within significantly superior than four tester variety. For the purpose of further selection, determining of the best C1 genotype should be done per location due to large environmental effect.
Co-Authors Aqil, Muhammad Azrai, Muhammad Makalau, Andi Takdir Praptana, R. Heru Suwarti, Suwarti