Abstract. Sadimantara GR, Yusuf DN, Febrianti E, Leomo S, Muhidin. 2021. The performance of agronomic traits, genetic variability, and correlation studies for yield and its components in some red rice (Oryza sativa) promising lines. Biodiversitas 22: 3994-4001. Improving a new variety commonly depends on the nature and magnitude of genetic variability and its utilization, followed by selection and evaluation before being released into new superior types. The present study aims to estimate the genetic variability and relation between yield and its related traits of the red rice promising lines. The experiment was arranged based on a randomized complete block design (RCBD) with three replications. Analysis of variance revealed significant differences among rice lines for 12 quantitative traits. The phenotypic coefficient of variation (PCV) value was higher than the genotypic coefficient of variation (GCV), indicating a negligible environmental influence in the phenotypic expression of traits. High heritability estimates coupled with high genetic advance were recorded for grain total per panicle and grain yield per hill. Grain yield observed a highly significant positive correlation with panicle length (0.63), percentage of filled grains (0.53), grain weight per panicle (0.54), and thousand-grain weight (0.52). It correlated negatively with days to 50% flowering (-0.61) and days to maturity (-0.48). The study indicated that panicle length, percentage of filled grains, grain weight per panicle, and thousand-grain weight are important yield-related traits and could be used for selection to improve the genetic potential of rice yield.

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Rice in Indonesia is still the main staple food, and every year the demand has increased. Indonesian governments have policies to reach self-sufficiency. The strategic programs to increase rice production were through breeding programs. The research was conducted on paddy fields in the village of Ranomeeto District of South Konawe. The study was carried out from October 2018 to April 2019. This study aimed to determine the differences in the agronomic traits in the aspect of vegetative and generative character from some new types of advanced red rice promising lines grown on the paddy field. The experiment was laid out based on Randomized Complete Block Design (RCBD), which consisted of six red rice lines (GS12-1, GS12-2, GS44-1, GS44-2, GS16-1, GS16-2) and one check variety (trisakti). Each treatment was repeated four times, so there were 28 experimental units. Parameters observed were plant height, leaf number, leaf area, number of tillers, panicle length, total grain number, 1000-grain weight, filled grain percentage, unfilled grain percentage and dry weight per m2 The results showed that there were differences in the agronomic traits of the promising rice lines GS12-1, GS12-2, GS44-1, GS44-2, GS16-1, GS16-2, and trisakti variety on paddy field. The new type of advanced red rice promising lines can well be adapted on paddy fields obtained in GS16-1 lines, followed GS16-2 lines and GS44-2 lines.

Salah satu lahan marjinal yang memiliki polibagensi tinggi untuk dikembangkan di Indonesia adalah lahan pantai. Sulawesi Tenggara memiliki panjang garis pantai sebesar 1.740 km, namun masyarakat belum memanfaatkan lahan pasir pantai tersebut secara optimal, terutama untuk kegiatan pertanian. Tanaman yang berpolibagensi untuk dikembangkan di lahan pesisir adalah tanaman sawi mengingat permintaan yang terus meningkat dari tahun ke tahun. Secara nasional kemampuan produksi tanaman sawi Indonesia 8-10 ton ha-1. Di Sulawesi Tenggara produksi sawi rata-rata hanya 3,84 ton ha-1 dengan luas panen 165 ha. Penelitian ini bertujuan mengetahui pengaruh rekayasa mutu tanah pasir pantai melalui aplikasi bahan organik terhadap pertumbuhan dan produksi tanaman sawi. Penelitian menggunakan Rancangan Acak Lengkap dengan 4 perlakuan dengan 5 ulangan. Perlakuan yaitu tanpa pemberian pupuk organik, pupuk kompos kotoran sapi, pupuk organik Gaksi, dan kombinasi pupuk organik. Hasil penelitian menunjukkan bahwa kombinasi pupuk organik kompos kotoran sapi dan pupuk organik Gaksi terbaik pada perlakuan 100 g pupuk kompos kotoran sapi dengan 10 g pupuk organik Gaksi memberikan hasil terbaik terhadap pertumbuhan dan produksi tanaman sawi pada tanah pasir pantai.

The purpose of this research was to investigate a response of four promising lines of upland rice (Oryza sativa L.) on low-light environments. The study was carried out at the Agronomy Field Laboratory, Faculty of Agriculture, Halu Oleo University Kendari and arranged on split plot design on two factors. The different shade level placed as the main plot and different promising lines as subplot. The observed variables were number of productive tillers, panicle length, the number of unfilled grains and grain yield (t ha−1). The results indicate that both the shade levels and upland rice promising lines affected the grain yield and yield attributes. The shade levels tend to decrease grain yield and increase unfilled grain. The GS12-1 lines recorded as a better promising line, especially for the panicle length and grain yield (t. ha−1).

Efforts to develop upland rice need to be supported by plant breeding programs by assembling superior upland rice varieties. Eight advanced promising lines developed through a hybridization breeding program and two check varieties were used to study. The study conducted in Langgea Village (4°3’24”S and 121°27’59”E), Ranomeeto District, South Konawe Regency, Southeast Sulawesi. The experiment arranged in a split-plot design using randomized complete block (RCB) and three replications. Shade treatments arranged as main plots and the different of upland rice promising lines as subplots. The parameters observed were included vegetative and generative character. The results showed that the genotypes significantly differed in grain yield and yield attributing traits. The estimation of genetic parameters of some upland rice promising lines for grain yield and yield attributing traits indicated that total grain per panicle and leaf area had high both genotypic and phenotypic coefficient variance. There were genotypic diversity values on the appearance of some upland rice promising lines at a low light intensity, which had the highest value on the total grain per panicle (282.13) and the lowest value on the grain weight per clump (1.02).

Red rice is an essential food and has nutritional content, but farmers’ production and interest in red rice cultivation are still relatively low. One effort to develop and increase brown rice production is planting superior varieties with selection efficiency. The purpose of this study was to determine the correlation between yield components and yields of the six promising lines of red rice in paddy fields and to know the yield components that were positively correlated very significantly to the results in paddy fields. The research design used was a randomized block design (RBD) consisting of 6 crosses, namely GS11-1, GS11-2, GS12-1, GS12-2, GS44-1, GS44-2, and one comparison variety, Trisakti. The results of the analysis show that there were two components of yield that were highly positively correlated with yields of red rice, which were positively correlated significantly, including the number of productive tillers with grain yield per clump (0.83 **) and the weight of 1000 grains with grain yield (0.57 **).

Tanaman okra telah lama dibudidayakan, namun di Indonesia produksinya masih rendah.  Hal ini terkait dengan aspek fisik tanah dan iklim serta aspek sosial.  Berdasarkan aspek fisik, sebagian besar budidaya Okra diusahakan pada lahan-lahan marginal dengan tingkat kesuburan yang rendah dengan kondisi iklim yang kering.  Secara sosial, tanaman ini belum dibudadayakan secara luas akibat masih terbatasnya pengetahuan masyarakat tentang manfaat dan penggunaannya.  Pada penelitian ini menggunakan pupuk organik cair berbasis limbah pasar yang dapat memperbaiki beberapa sifat tanah serta ramah lingkungan. Penelitian ini bertujuan untuk mengetahui respons tanaman okra terhadap aplikasi pupuk pupuk organik cair. Penelitian dilaksanakan pada Bulan Maret–Juni 2019 di Laboratorium Lapangan Fakultas Pertanian Universitas Halu Oleo. Penelitian ini menggunakan Rancangan Acak Kelompok dengan pupuk organic cair sebagai perlakuan dengan 5 taraf dosis yaitu kontrol, 50 ml L-1, 100 ml L-1, 150 ml L-1 dan 200 ml L-1 air. Data dianalisis sesuai dengan rancangan yang digunakan dan dilanjutkan dengan Uji Jarak Berganda Duncan (UJBD) 5%.  Hasil penelitian menununjukkan bahwa aplikasi pupuk organik cair mempengaruhi semua variabel pertumbuhan (tinggi tanaman, jumlah daun dan diameter batang), komponen hasil (jumlah buah dan bobot buah per tanaman) dan hasil  (jumlah buah dan bobot buah per petak).  Aplikasi pupuk organik cair  dengan taraf dosis 100 ml L-1 air memberikan pengaruh terbaik pada pertumbuhan, komponen hasil dan hasil tanaman okra.Kata kunci  : Okra, pupuk organik cair, pertumbuhan,  hasil