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- W2804229132 abstract "A total of 221 pili accessions, including the 7 NSIC-registered varieties, have been collected from the germplasm collections of IPB-CSC [Institute of Plant Breeding-Crop Science Cluster], CSC orchard (Pili Drive) and DA [Department of Agriculture] Pili Research and Technology Center (DA-PRTC) in Tabaco, Albay [Philippines], as well as from three private pili farms in Bulusan, Sorsogon [Philippines]. Fruit (whole fruit, pulp, nut, shell, kernel) characters have been evaluated for each pili accession according to the tropical fruit descriptor set by the International Board for Plant Genetic Resources (IBGRI) with 'Katutubo' as reference variety. The pili accessions were ranked for fruit character evaluated and several accessions, mostly from Pili Drive, were identified to be superior to 'Katutubo' in terms of fruit characters. Furthermore, tree characters (growth habit, dwarfness, leaf shape, growth and vigor, fruit setting) have been evaluated for all trees except for 17 accessions from the DA-PRTC. SSR [simple sequence repeat] marker primers which have been successfully used in papaya and published primers used in Canarium album (Zhang et al., 2009) were used for cross-species amplification in pili. Six out of the 12 polymorphic primer pairs screened have been optimized and used for genetic diversity analysis and DNA fingerprinting for variety identification of pili. For genetic diversity analysis, five SSR markers amplified a total of 24 alleles (4.8 alleles per markers) in the 95 pili accessions. The average PIC of the five markers was 0.6987 indicating the capability of the primers to detect and quantify genetic diversity in C. ovatum. The initial DNA fingerprints of the 7 NSIC-registered pili varieties and Canarium luzonicum using 6 SSR primers have been established: Katutubo (111111), Lanuza (112212), Laysa (223322), Magayon (114411), Magnaye (104511), Mayon I (115612), Orolfo (114711), and C. luzonicum (326812). Each digit of the finger print refers to the banding patterns for markers Cas A 131, Cas A 183, Cas C 120, SSR 12, SSR 31 and SSR 38, respectively. The fingerprints were informative and differences were observed among the genotypes in terms of the uniqueness of identification numbers with the 6 primers. This demonstrated the usefulness of this technique for varietal identification in pili. Moreover, the dendrogram generated based on SAHN cluster analysis using UPGMA revealed that the varieties and C. luzonicum formed two groups at 0.60 coefficient of similarity namely: Group 1 - Katutubo, Magayon, Magnaye, Orolfo and Laysa and Group 2 Lanuza, Mayon 1 and C. luzonicum. However for Group 2, at 0.75 coefficient of similarity, C. luzonicum separates from the C. ovatum varieties. A partial cDNA library of pili was prepared. The full length cDNAs of a small heat shock protein (583 bp) and zinc-finger protein (792 bp) were generated using the partial sequences obtained from clones in the cDNA library. On the other hand, the partial cDNA sequence (450 bp) of the house keeping gene glyceraldehydes-3-phosphate was obtained using designed gene-specific primers and polymerase chain reaction. The complete cDNAs of two isoforms of the pili oleisin were elucidated. RAPD-PCR [randomized amplified polymorphic DNA-polymerase chain reaction] using 37 random primers has been conducted to screen for sex-specific and sex-neutral DNA fragments for the development of SCAR [sequence characterized amplified region] markers for sex determination of pili. Three candidate sex neutral DNA fragments have been obtained from the study." @default.
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- W2804229132 date "2013-01-01" @default.
- W2804229132 modified "2023-09-23" @default.
- W2804229132 title "Development of DNA markers for genetic diversity analysis, fingerprinting and sex determination of pili (Canarium ovatum)" @default.
- W2804229132 hasPublicationYear "2013" @default.
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