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M. Rachmadi
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KORELASI ANTARA KARAKTER KERAPATAN TRIKOMA DAN STOMATA DENGAN KETAHANAN PENYAKIT KARAT PADA BEBERAPA KULTIVAR KRISAN POT Warid Ali Qosim; M. Rachmadi; , Hersanti; Atin Suwarti
Zuriat Vol 16, No 1 (2005)
Publisher : Breeding Science Society of Indonesia (BSSI) / PERIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/zuriat.v16i1.6782

Abstract

Penyakit karat dapat menurunkan kualitas bunga krisan pot. Tujuan penelitian untuk mengevaluasi karakter ketahanan 22 kultivar krisan pot terhadap penyakit karat dan korelasinya dengan kerapatan trikoma dan stomata. Percobaan ditata dalam Rancangan Acak Kelompok (RAK) dengan 22 kultivar krisan pot sebagai perlakuan dan diulang tiga kali. Hasil penelitian menunjukkan terdapat sembilan kultivar krisan pot tergolong imun, yaitu kultivar Tawn Falk, Tiger, Reagen Rossy, Pink Mambo, Yellow Boaldi, Autumn Glory, Yellow Kettay, Stroika dan White Boaldi dan satu kultivar tahan yaitu kultivar White Reagan. Empat Kultivar yang tergolong agak peka, yaitu kultivar Mike, Pink Davis, Pink Regol dan Redding. Delapan kultivar tergolong peka, yaitu White Cherry Papilon, Fiji Yellow, Red Cherry Papilon, Pink Violet, Fiji White, Puma Sunny Pink Arola dan Fiji. Terjadi hubungan korelasi negatif antara karakter kerapatan trikoma dan stomata dengan karakter ketahanan terhadap penyakit karat.
Preliminary Selection on Yield of Three Way Cross QPM Hybrids in West Java-Indonesia D. Ruswandi; Dwi Wirawan; S. Ruswandi; F. Kasim; M. Rachmadi
Zuriat Vol 18, No 2 (2007)
Publisher : Breeding Science Society of Indonesia (BSSI) / PERIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/zuriat.v18i2.6706

Abstract

Thirty-two TWC QPM hybrids were selected based on genotype × environment (G × E) interaction and stability. The experiment was conducted in three locations with differing conditions. TWC QPM hybrids were tested under nitrogen deficient and nitrogen sufficient fertilization at the Padjadjaran University Faculty of Agriculture Experimental Station, Jatinangor, Sumedang from March until July 2004. Another set of TWC QPM hybrids was tested under sufficient nitrogen fertilization at a high altitude location in Pangalengan from June until October 2004. Each experiment was arranged in a randomized block design with two replications with 32 TWC QPM hybrids and two check cultivars, i.e. Bisi-2 and Pioneer-7. Bartlett’s homogeneity test was applied to error derived from analyses of variances of every location. Combined analysis was done since error was homogenous for all observed characters. The combined analysis showed that there was G × E interaction for seed weight per 10 plants. Preliminary METs in West Java successfully selected newly developed TWC QPM hybrids based on stability and interaction between G × E. These hybrids are QPDMR-8-BCP1 and QPDMR-8-BCP2 for wide adaptive cultivars and QPDMR-35-BCP1, QPDMR-26-BCP1, QPDMR-8-BCP1, QPDMR-1-BCP2, QPDMR-8-BCP2, QPDMR-10-BCP2 and QPDMR-15-BCP2 specific adaptive cultivars.
MOLECULAR CHARACTERIZATION OF QUALITY PROTEIN MAIZE AND DOWNY MILDEW RESISTANCE LINES BASED ON SIMPLE SEQUENCE REPEATS (SSRs) MARKER D. Ruswandi; N. Wicaksana; M. B. Pabendon; M. Azrai; M. Rachmadi; A. Ismail; N. Carsono; F. Damayanti; F. Kasim
Zuriat Vol 16, No 1 (2005)
Publisher : Breeding Science Society of Indonesia (BSSI) / PERIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/zuriat.v16i1.6779

Abstract

The information on germplasm diversity and genetic relatedness among elite breeding materials is an important element in maize breeding. Molecular characterization and genetic relationship of 11 QPM-DMR lines were analysed using thirty three SSRs markers. Genetic relationship was determined using Jaccard’s similarity coefficient, and dendogram was then constructed based on the unweighted pair-group method with arithmetical averages (UPGMA). Result showed that (i) all SSRs loci were informative for describing the genotypic variation as showed by their PIC, which ranged from 0.19 for umc1304 to 0.93 for phi112; (ii) the eleven maize inbred lines were clustered into one major group A and small groups B and C that corresponds well with the breeding programs adopted at different institutes of release, and (iii) thus, SSRs marker system is a valuable marker for varietals identification and for genetic diversity study of elite breeding materials.
HERITABILITY AND HETEROSIS OF GRAIN YIELD ON DOWNY MILDEW RESISTANCE (DMR) AND QUALITY PROTEIN MAIZE (QPM) INBREDS AND THEIR SINGLE CROSS HYBRIDS D. Ruswandi; N. Wicaksana; M. Rachmadi; A. Ismail; D. Arief; F. Kasim
Zuriat Vol 16, No 1 (2005)
Publisher : Breeding Science Society of Indonesia (BSSI) / PERIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/zuriat.v16i1.6780

Abstract

Improvement of high yield maize cultivars possessing high quality of seed as showed by high lysine and tryptophan content must be fulfilled with resistance against downy mildew pathogen in any maize breeding program. A set of experiment to study genetic variability and to estimate both heritability and heterosis of important characters of grain yield on DMR and QPM lines has been conducted. Four downy mildew resistance (DMR) lines, i.e. Nei 9008, P 345, Ki 3, and MR 10; three quality protein maize (QPM) lines, including CML 161, CML 163, and CML 172; and their single cross hybrids formed based on line × tester mating design were used in the experiment. The following characters: height of the first ear, seeds number per row, seed weight per ear, and grain yield per plot showed broad genetic variability. Narrow sense heritability (hns) of grain yield and its components ranged from 0.01 to 0.71. Broad sense heritability (hbs), on the other hand, ranged from 0.20 to 0.74. It was found that hybrid derived from crossing between parental inbred lines possessing broad genetic background would express high heterosis.
Co-Authors A. Ismail Atin Suwarti D. Arief D. Ruswandi Dwi Wirawan F. Damayanti F. Kasim Hersanti - M. Azrai M. B. Pabendon Muklis Muklis N. Carsono N. Wicaksana S. Ruswandi WARID ALI QOSIM Yundari, Yundari