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STABILITAS PERTUMBUHAN VEGETATIF 5 (LIMA) GENOTIPE PEPAYA (Carica papaya L.)
DI 3 ( TIGA) LINGKUNGAN TUMBUH

Sunyoto dan T. Budiyanti
Balai Penelitian Tanaman Buah Tropika
Jl. Raya Solok-Aripan Km 8 Solok Sumatera Barat 27301

Balai Penelitian Tanaman Buah Tropika telah melakukan beberapa tahap kegiatan pemuliaan pepaya sehingga diperoleh beberapa kandidat pepaya unggul. Calon varietas unggul tersebut perlu di uji stabilitas pertumbuhan dan hasil pada beberapa lokasi. Penelitian ini bertujuan untuk mengetahui stabilitas pertumbuhan vegetatif 5 genotip pepaya di tiga lokasi. Penelitian dilakukan di tiga lokasi yaitu : KP Subang dengan ketinggian tempat 84 meter dpl, KP Sumani 84 meter dpl dan Lubuk Alung Padang Pariaman 25 dpl. Rancangan percobaan yang digunakan pada masing-masing lokasi adalah Rancangan Acak Kelompok dengan 5 perlakuan (5 genotip) dan 6 ulangan. Peubah yang diamati meliputi pertumbuhan vegetatif pepaya. Stabilitas pertumbuhan dihitung berdasarkan regresi dari Eberhart dan Russel. Hasil pengujian terdapat interaksi yang nyata antara genotip dan lingkungan yaitu pada tinggi tanaman, jumlah daun, diameter batang, letak bunga pertama dan tinggi bunga pertama. Uji stabilitas tinggi tanaman dan jumlah daun genotipe BT-1 mempunyai koefisien regresi (βi)<1. Hasil uji stabilitas terhadap karakter ruas letak bunga pertama dan tinggi bunga pertama mempunyai koefisien regresi (βi)> 1 artinya genotipe memiliki stabilitas di bawah rata- rata dan beradaptasi khusus di lingkungan yang produktivitasnya tinggi. Penampilan beberapa karakter vegetatif dan generatif awal pada 5 genotip pepaya di 3 lokasi yang terlihat berbeda, menunjukkan pertumbuhan yang tidak stabil.
Kata kunci : Pepaya; Stabilitas; Pertumbuhan vegetatif

ABSTRACT. Sunyoto and T. Budiyanti. The Stability of vegetative growth 5 genotypes of papaya on three growth sites. 2010. Indonesian Tropical Fruits Research Institute has conducted several stages of papaya breeding activity in order to obtain best candidate of papaya. Need to investigate 5 genotype of papaya due to stability of growth vegetative stability at 3 growth sites. This study aimed to determine the stability of five genotype of papaya at three locations. This research was conducted at three locations namely; KP. Subang, at 84 meter above sea level, KP Sumani at 84 metre above sea level, and Lubuk Alung Padang Pariaman at 25 metre above sea level. The experimental design used were randomized Block Design with 5 treatment (5 genotypes) and 6 replications. The variables observed were the vegetative growth of papaya. The stability of growth is calculated based on regression by Eberhart and Russell. The result showed that significant interaction occur between genotype and environment was showed in plant height, leaf number, stem diameter, first flower position and first flower height position. The stability test of plant height and leaf number BT -1 genotype had regression coeficients (βi) <1. That means this genotype at low level of stability than average and adapt specially to high productivity environment. Appearance of vegetative and generative characters beginning at five genotypes of papaya in three sites which look differ, that is showed by un stable of growth.
Keywords : Papaya; Stability; Vegetative growth

 
Prosiding :
Seminar Nasional Program dan Strategi Pengembangan Buah Nusantara Solok,
Balitbu Tropika
Solok, 10 Nopember 2010
SELEKSI DAN KARAKTERISASI NENAS RENDAH OKSALAT

Hadiati, S.
Balai Penelitian Tanaman Buah Tropika
Jl. Raya Solok-Aripan Km 8 Solok Sumatera Barat 27301

Penelitian ini bertujuan untuk mendapatkan 5 – 10 aksesi nenas sebagai kandidat nenas unggul dengan kandungan kasium oksalat rendah. Penelitian dilakukan pada bulan Januari 2005 - Desember 2005 di KP. Aripan –Solok. Bahan tanaman yang digunakan adalah 88 aksesi nenas hasil koleksi indigenous. Hasil penelitian menunjukkan bahwa 1). Kandungan oksalat antar tanaman dalam satu aksesi dan antar aksesi bervariasi, 2). Kandungan oksalat aksesi hasil eksplorasi indigenous berkisar 1071.63 mg/100g – 4463.37 mg/100 g dan hasil seleksi sementara diperoleh 5 tanaman yang mempunyai kandungan oksalat relative rendah dibandingkan aksesi lainnya dengan TSS (≥ 15° Brix ), yaitu N–014.4 (1090 mg/100 g ; 16.67° Brix), N– 070.1 (1110 mg/100 g ; 16.80° Brix ; N– 001.3 (1150 mg/100 g ; 16.20° Brix), N– 055 (1230 mg/100 g ; 17.00° Brix), N– 004.2 (1260 mg/100 g ; 16.07° Brix).
Kata kunci: Ananas comosus; Aksesi; Seleksi; Oksalat

ABSTRACT. Hadiati, S. 2010. Selection and characterization of low oxalate pineapple. The objective of this research was to find 5 – 10 accessions of pineapple which have low content of oxalate, and those are as the leading candidate pineapple. The research was conducted at Aripan – Solok experimental station from January – December 2005. The plant materials used were 88 accessions of indigenous pineapple collection. The result showed that 1) the oxalate content within plants in one accession and among accessions is varied; 2). The oxalate content of accessions of indigenous pineapple collection, which have been evaluated, ranges between 1071.63 mg/100g – 4463.37 mg/100 g and temporary selection results are obtained 5 individual plants which have low oxalate with TSS level of more or less 15° Brix, namely : N–014.4 (1090 mg/100 g ; 16.67° Brix), N– 070.1 (1110 mg/100 g ; 16.80° Brix ; N– 001.3 (1150 mg/100 g ; 16.20° Brix), N– 055 (1230 mg/100 g ; 17.00° Brix), N– 004.2 (1260 mg/100 g ; 16.07° Brix).
Keywords : Ananas comosus; Accession; Selection; Oxalate

Prosiding : 
Seminar Nasional Program dan Strategi Pengembangan Buah Nusantara Solok, 
Balitbu Tropika Solok, 
10 Nopember 2010