Lima padi hibrida (H40, H41, H45, H57, H63) dan tiga varietas pembanding (Maro, Hipa3, dan IR64) diuji daya hasilnya di Jawa Tengah pada MK 2005. Percobaan menggunakan rancangan acak kelompok dengan empat ulangan. Tujuan penelitian adalah untuk mengetahui stabilitas hasil dan daya adaptasi padi hibrida tersebut pada tujuh lokasi di Jawa Tengah. Stabilitas hasil tiap genotipe ditentukan berdasarkan analisis regresi hasil terhadap produktivitas lingkungan, sedangkan daya adaptasi ditentukan berdasarkan kriteria Finlay dan Wilkinson. Hasil penelitian menunjukkan bahwa rata-rata hasil kelima padi hibrida berkisar antara 4,92-6,35 t/ha. Empat padi hibrida (H40, H45, H57, dan H63) memberikan hasil 2,33-8,61% lebih tinggi daripada IR 64. Analisis statistik menunjukkan bahwa hasil H40, H45, H57, dan H63 stabil pada berbagai lokasi uji. Kombinasi H40, H57, dan H63 berpeluang untuk dapat beradaptasi dengan semua lingkungan. H45 beradaptasi khusus di lingkungan optimal, dan kombinasinya dengan H40 dapat beradaptasi pada lingkungan marginal.
Yield Stability and Adaptability of Five Rice Hybrids in Central Java. Five rice hybrids (H40, H41, H45, H57, and H63) and three check varieties (Maro, Hipa3, and IR64) were tested for their yield stability and adaptability at 7 locations in Central Java during the dry season of 2005. The experiment was arranged in a randomized block design with 4 replications. Objectives of the research were to evaluate stability and adaptability of the rice hybrids at 7 locations in Central Java. Yield stability and adaptability were determined based on the stability model of Eberhart and Russel and the adaptability criteria of Finlay and Wilkinson. Results indicated that yield potential of the five rice hybrids varied greatly, ranging from 4.92 t/ha (H41) to 6.35 t/ha (H35). Four rice hybrids yielded 2.33-8.61% higher than did IR64. The yield performances of hybrids H40, H45, H57, and H63 were stable across locations. Hybrids H40, H57, and H63 adapted well in all environments. Hybrid H45 adapted only to an optimal growth environment, while H40 adapted to sub optimal areas.
