Keragaman Genetik dan Karakter Agronomi Galur Haploid Ganda Padi Gogo dengan Sifat-Sifat Tipe Baru Hasil Kultur Antera

The development of new plant type of upland rice in relatively short time can be done by using anther culture technique. The technique has been recognized as a rapid and efficient technology for plant improvement. Plant materials used in this research were 320 s doubled haploid lines derived from anther culture and their 4 parents namely Fatmawati, SGJT-28, SGJT-36 and Way Rarem. Observation was conducted on plant height, number of productive tillers, days of flowering and maturity, length of panicle, number of grains per panicle, number of filled grains per panicle, percentage of unfilled grains, weight of 1000 grains and weight of grains per hill. The result showed that there were broad variations in the agronomic characters of doubled haploid lines. There were 58 upland rice lines can be obtained with new plant type characters (NPT). Several lines showed superior characters. Line P6-105, P3-134, P3-135, P3-175 had productive tiller more than that of parental, P3-160, P3-196, P6-274 had long panicle, number of grain per panicle and low percentage of unfilled grain, P3-135, P6-271, P6-274, and P6-276 had weight of grains per hill. These lines had potential as new plant type of upland rice. Length of panicle, number of grains per panicle, number of filled grains per panicle, and weight of grains per hill had high heritability and wide genetic variability

Characterization of Doubled Haploid Derived From Anther Culture for New Type Upland Rice

Anther culture is one of tissue culture methods which can be applied to plant breeding programs in order to accelerate the process of obtaining pure lines. The successful development of rice varieties is highly dependent on genetic diversity and desirable traits. To obtain the genetic variability of doubled haploid lines through anther culture techniques, anther F1 or F2 were used as explants sources. The objectives of the study were to select and characterize doubled haploid lines of upland rice having the characters of new plant type, and to study the genetic variability and agronomic characters of tested doubled haploid lines. A total of 58 doubled haploid lines, and four parental lines i.e. Fatmawati, SGJT-28, SGJT-36, and Way Rarem were used in this study. The experiment used completely randomized design with three replications. Results showed that the characters of the doubled haploid lines vary considerably. Selection of the character i.e. number of productive tillers, number of fi lled grain per panicle, and percentage of empty grain was more effective to be selected because they were well correlated to weight of grain per hill, possessed high heritability values, and have wide genetic variability. Based on productive tillers number, number of fi lled grains per panicle, fertility, weight of 1,000 grains, and weight of grains per hill, the lines of P3-26, P3-27, P3-28, P4-45, P5-50, P6-103, P6-105, P3-120, P3-134, P3-135, P3-150, P3-158, P3-248, P3-249, P6-271, P6-272, P6-274, P6-276, and P6-295 were potential for further selection for new type of upland rice

Penularan Teknologi Grafting Kopi Robusta pada Kelompok Tani Sejahtera Kabupaten Rejang Lebong Provinsi Bengkulu

Provinsi Bengkulu menyandang predikat sebagai daerah segitiga kopi (coffee triangle regions). Permasalahan utama petani kopi adalah produktivitas rendah, yakni 0.70 ton/hektar. Teknologi grafting (sambung), yang di masyarakat dikenal sebagai kopi stek dapat untuk mengatasi permasalahan rendahnya produktivitas tanaman. Metode penularan teknologi tersebut dilaksanakan dengan metode penyuluhan dan sekolah lapang. Penyuluhan teknologi grafting tanaman kopi robusta dilakukan terhadap Kelompok Tani Sejahtera. Praktek lapang tentang teknologi grafting dilakukan di kebun petani kooperator. Tahapan kegiatan pengabdian pada masyarakat (PPM) ini terdiri dari penyiapan materi untuk penyuluhan dalam bentuk power point, koordinasi dengan petani kooperator, peninjauan kebun kopi milik petani kooperator, penularan keahlian grafting kepada kelompok tani melalui kegiatan penyuluhan dan sekolah lapang untuk praktek penyambungan dengan teknologi Tak Ent. Hasil kegiatan ini adalah materi penyuluhan, dokumentasi keadaan kebun kopi petani kooperator sebelum dan sesudah kegiatan PPM, anggota Kelompok Tani Sejahtera mengetahui teknologi grafting metode tak ent, anggota kelompok tani trampil melakukan grafting, dan pohon kopi robusta hasil teknologi grafting yang mulai berbuah dan akan panen pada musim panen 2021. Simpulan kegiatan adalah anggota Kelompok Tani Sejahtera mengetahui teknik grafting kopi robusta dengan metode tag ent dengan baik, dan mulai mempraktekkan grafting di kebun masing-masing, serta perkembangan pohon kopi hasil grafting menunjukkan penampilan buah sangat lebat, sehingga dapat meningkatkan produktivitas kebun kopi