Korelasi Genetik Pertumbuhan dan Produksi Getah pada Uji Keturunan Pinus merkusii di KPH Banyumas Barat

Abstract

ABSTRAKPenelitian ini bertujuan untuk mengetahui korelasi genetik pertumbuhan (tinggi dan diameter) terhadap produksi getah tanaman uji keturunan Pinus merkusii. Penelitian dilakukan pada uji keturunan half-sib P. merkusii produksi getah umur 4 tahun, menggunakan Incomplete Block dengan Row Column Design sistem sub galur (Sulawesi 1, KBS Sumedang 1, Sulawesi 2 dan Jatim 2). Korelasi genetik antara tinggi dan diameter terhadap produksi getah pada sub galur KBS Sumedang bernilai negatif sehingga seleksi lebih lanjut hanya ditujukan untuk produksi getah saja. Sedangkan korelasi genetik pada sub galur Sulawesi 2, Sulawesi 1 dan Jatim 2 bernilai positif sehingga seleksi lebih lanjut ditujukan untuk produksi kayu dan getah.Kata kunci: Korelasi genetik, pertumbuhan, Pinus merkusii, sub galur, uji keturunan ABSTRACTThe research was aimed to assess the correlation between genetic of growth (diameter and height) and resin yield of progeny test Pinus merkusii. The study was conducted on half-sib progeny test of 4-year-old P. merkusii resin yield plantation, using incompletely-block-rowcolumn design by sub-line system of the following seed sources (Sulawesi 1, SSO Sumedang 1, Sulawesi 2 and Jatim 2). Genetic correlation between resin yield and tree height and diameter of sub-line SSO Sumedang were negative, therefore the further selection only addressed for resin production. On the other hand, the genetic correlation for sub-line Sulawesi 1, Sulawesi 2 and Jatim 2 were positive and further selection would be designed for resin and wood production.

Estimation of genetic parameter for growth of one year old Swietenia macrophylla King. progeny trial in Trenggalek, East Java

“…The genetic correlation between height growth and stem diameter of 1-year-old S. macrophylla plants has a strong positive value (0.90). Like the heritability value, the genetic correlation value in this study is greater than the genetic correlation value in the research of [8] on the same plant species and age, which amounted to 0.79. Although it is an introduced species, the genetic correlation value in this study is also higher than the genetic correlation value of several other tropical plant species, including sandalwood (Santalum album) aged 8 months at 0.87 [35], and nyawai (Ficus variegata) aged 1 year at 0.8 [36].…”

“…In this study, the significant effect of the interaction treatment between blocks and families on plant growth (height and stem diameter) is likely to occur because the test site has a high difference in slope, so the growing conditions are quite diverse. At the field level, analysis of variance with significant results for the treatment of families and the interaction between blocks and families in 1-year-old S. macrophylla plants was also reported in the research of [8] in Kemampo, South Sumatra. In another study conducted in Butuan, Northern Mindano, Philippines on 50-month-old S. macrophylla progeny trial plants, it was informed that the origin of the seed source (land race) had a significant effect on the growth of height and stem diameter [4].…”

“…The moderate criterion for stem diameter characteristics and the high criteria for plant height characters both include these heritability values [28]. When compared to findings from a study conducted on the same plant species and age in Kemampo, South Sumatra by [8], the individual and family heritability values in this study are greater. The genetic material employed in this study had a pretty wide distribution (West Java, Central Java, East Java, and Lombok), whereas the genetic material used in the study by [8] comes from Bogor, Lampung, and South Sumatra.…”

“…The findings of this study are consistent with those of [7], who found that there were substantial differences in the growth of S. macrophylla seedlings from West Java, Central Java, East Java, and Lombok across families and land races. Additionally, the heritability value of individual and family of S. macrophylla progeny trial at 1-year-old in Kemampo, South Sumatra, was reported to be in the moderate category at the field level [8]. These findings encourage the breeding efforts of S. macrophylla since there will be possibilities for selection because to the high genetic diversity and moderate to high heritability values.…”