Reproductive success and compatibility among accessions of <i>Jatropha curcas</i> in Indonesia

  • Endah R. Palupi Departmen Agronomy and Horticulture, Bogor Agricultural University, Bogor, Indonesia 16680
  • Ade S. Ahmad Departmen Agronomy and Horticulture, Bogor Agricultural University, Bogor, Indonesia 16680
  • Rofiq Affandi Departmen Agronomy and Horticulture, Bogor Agricultural University, Bogor, Indonesia 16680
  • Abdul Qadir Departmen Agronomy and Horticulture, Bogor Agricultural University, Bogor, Indonesia 16680
  • Eni Randriani Indonesian Centre for Estate Crops Research and Development, Sukabumi, Indonesia

Abstract

Large scale exploitation of Jatropha curcas for biofuel
production is restrained by low productivity hence
economically not protable. One of the main constraints
is due to limited number of female owers in an
inorescence which eventually develop into fruits that
bear seed. Investigation on oral biology and
reproductive potential of the species had been carried
out, but seems to vary among sites. The research was
conducted to study reproductive success and the
compatibility among Indonesian Jatropha accessions.
The research was set up in two experiments. The rst
experiment was conducted at the Jatropha seed
orchard, Pakuwon, Sukabumi, West Java from April to
July 2007 using four-year- old trees of accessions from
Lampung, Banten, West Java, and Central Java. The
second experiment was conducted at Leuwikopo
Experimental Station of Bogor Agricultural University
from April to July 2008 using one-year-old trees of
accessions from Lampung, Bengkulu, Palembang, and
Kediri. Flowers were obtained from controlled self and
cross-pollinated as well as left for open-pollination. The
result showed that reproductive success varied among
accessions; the greatest success was 0.73 obtained
from aWest Java accession and the least was 0.53 from
Banten accession. The Jatropha accessions were
categorized as partially self-incompatible as indicated
by index of self-incompatibility (ISI) that ranged 0.93-
0.99. Banten accession produced highly viable and
vigorous seeds regardless of pollination methods;
accessions of Central Java produced higher viability
seeds when cross-pollinated within accession, whereas
those from West Java and Lampung produced higher
viability seeds when self-pollinated.

Keywords: accessions, Jatropha curcas, selfpollination,
self-incompatibility, seed
viability

Published
2014-12-16