Pengaruh Pemotongan Akar dan Umur Bibit terhadap Pertumbuhan dan Jenis Seks Tanaman Pepaya

Rahayau Triatminingih

Abstract


ABSTRAK. Persilangan antartanaman menghasilkan populasi segregasi dengan proporsi seks yang berbeda-beda.
Dalam persilangan tanaman, identitas varietas menjadi kunci utama. Di sisi lain teknik identifikasi seks sejak fase benih
sangat dibutuhkan dalam upaya mempercepat siklus generasi dan efisiensi dalam uji persilangan. Tujuan penelitian
adalah mengetahui tipe seks yang terjadi akibat pengaruh perlakuan pemotongan akar dan umur bibit pada pepaya.
Penelitian dilaksanakan di Probolinggo, Jawa Timur, pada bulan April sampai dengan Desember 2001. Penelitian
menggunakan rancangan petak terpisah dengan 4 ulangan. Petak utama adalah varietas yang dikombinasikan dengan
umur bibit, dan anak petak adalah akar yang tidak dipotong dan dipotong. Hasil penelitian menunjukkan bahwa
perlakuan pemotongan akar tidak berpengaruh nyata terhadap persentase hidup dan persentase tanaman berbunga.
Umur bibit tidak berpengaruh nyata terhadap persentase hidup, tetapi berpengaruh nyata terhadap persentase
berbunga. Pemotongan akar mempengaruhi persentase tanaman sempurna dan persentase tanaman betina, tetapi tidak
berpengaruh nyata terhadap persentase tanaman berbunga jantan. Untuk meningkatkan persentase tanaman sempurna
pada varietas Dampit, bibit ditanam pada umur 3 minggu setelah di polibag. Pemotongan akar pada varietas Sarirona
umur bibit 3 minggu dalam polibag menyebabkan penurunan persentase tanaman betina secara nyata. Persentase
tanaman sempurna pada varietas Dampit berbeda nyata dengan varietas Sarirona.

ABSTRACT. Triatminingsih. R. 2009. The Effects of Root Cutting and Seedling Age on the Growth and Sex
Type of Papaya. Out crossing the plant produces population segregation with variation of sex types in different
proportion. In plant crossing, identity of variety is the main key. On the other hand, sex identification technique at
early seedling stage is needed in order to accelerate generation cycle and to increase efficiency on crossing assessment.
The objective of this research was to determine the influence of root cutting and seedling age on the growth and sex
type of papaya. The research was conducted in Probolinggo, East Java, from April to December 2001. The split plot
design with 4 replications was used in this experiment, where combination of variety and seedling age as the main
plot, and root cutting as the subplot. The results of this experiment showed that root cutting did not significantly affect
the percentage of survival and the flowering plant. Seedling age significantly affected the percentage of flowering
plant, but not on the percentage of survival. Root cutting at seedling stage could affect the percentage of female
flower and hermaphrodite flower. Root cutting on papaya seedling Sarirona variety at 3 weeks after transplanting
in the polybag could decrease the percentage of female flower. While Dampit variety transplanted after 3-week in
the polybag without root cutting gave higher percentage of hermaphrodite flower. The percentage of hermaphrodite
flower on Dampit variety was significantly different from Sarirona variety.


Keywords


Carica papaya L.; Root cutting; Seedling; Identification; Sex type

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DOI: http://dx.doi.org/10.21082/jhort.v19n1.2009.p%25p

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