Open AccessThe SUSPECT SYMPTOMS OF INBREEDING DEPRESSION AND THE HOMOZYGOSITY LEVEL OF FOURTH GENERATION OF SP450T AND FIFTH GENERATION OF DURA DELI OIL PALM SELFING POPULATION
Author(s) -
Rokhana Faizah,
Sri Wening,
Hernawan Yuli Rahmadi,
Abdul Razak Purba
Publication year - 2016
Publication title -
jurnal penelitian kelapa sawit
Language(s) - English
Resource type - Journals
eISSN - 2614-8889
pISSN - 0853-196X
DOI - 10.22302/iopri.jur.jpks.v24i2.8
Subject(s) - inbreeding depression , inbreeding , selfing , biology , population , runs of homozygosity , palm oil , genetics , veterinary medicine , zoology , microbiology and biotechnology , medicine , genotype , food science , single nucleotide polymorphism , environmental health , gene
Inbreeding is a common method used to reproduce candidate mother plant from selected parental lines for commercial seeds in Reciprocal Recurrent Selection (RRS) oil palm breeding program. However this practice may increased homozigosity level of selected population. This study concerned the level of homozygosity of SP540T fourth generations and Dura Deli Dolok Sinumbah fifth generations (3 crosses respectively) and their correlation with inbreeding depression symptoms. Polymerase Chain Reaction-Simple Sequence Repeat (PCR-SSR) with 16 markers developed for oil palm was used to analyze 327 samples. The result shows that the levels of homozigosity of SP540T fourth selfing generation were ranged between 0.44-0.84 or 0.61 in average. While the levels of homozygosity of Dura Deli fifth selfing generations were ranged between 0.60-0.93 or 0.78 in average. The homozygosity level in Dura Deli was 1.27% higher than SP540T populations. Correlation analysis showed that the higher the level of homozygosity, the higher of the inbreeding symptoms 2 observed (R =0.95).