Uji Stabilitas Hasil Umbi 7 Genotip Kentang di Dataran Tinggi Pulau Jawa
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Indonesian Center for Horticulture Research and Development
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Untuk mengetahui stabilitas 7 genotip kentang pada berbagai kondisi lingkungan di Pulau Jawa, telah dilakukan uji multilokasi. Lokasi pengujan adalah 2 kali di Pangalengan dan Garut, masing-masing sekali di Lembang, Cipanas, Ciwidey, Magelang, Banjarnegara, dan Pasuruan. Rancangan percobaan yang digunakan acak kelompok dengan 4 ulangan setiap petak percobaan ditanami 30 tanaman. Hasil percobaan menunjukkan bahwa satu-satunya genotip yang stabil adalah I-1085 dengan nilai koefisien regresi b=1 dan simpangan regresi δij=0. Genotip Atlantik menghendaki lingkungan yang menguntungkan ditandai dengan nilai b>1, sebaliknya genotip Panda dapat beradaptasi pada lingkungan yang kurang menguntungkan dengan nilai b<1. Potensi hasil tinggi ditampilkan oleh genotip 380584.3 (33,5 t/ha) dan genotip FBA-4 (28,1 t/ha) dengan b=1 namun δij=0.Yield stability evaluation of 7 potato genotypes in highland of Jawa Island. The aim of the research was to observe tuber yield stability of 7 potato genotypes at different environment of Jawa Island. Multilocation trials were located at Pangalengan and Garut for 2 seasons, Lembang, Cipanas, Ciwidey, Magelang, Banjarnegara, and Pasuruan (1 season) respectively. Experimental was arranged in a randomized complete block design with 4 replications, consisted of 30 plants per plot. The results of the experiment indicated that genotypes of I-1085 were stable to all location, showed by b=1and δij =0. Whereas, Atlantic was adapted to favorable environments showed by b>1. Panda was adapted to unfavorable environment showed by b<1. The highest tuber yield were obtained from genotypes 380584.3 (33.5 t/ha) and FBA-4 (28.1 t/ha), with b=1 but δij=0.
Keywords
Solanum tuberosum L.; Stability; Genotypes; Yield