Abstract:
Response of a biotic resistance for genetic resources against can be done gradually. Initial
selection was done on the seed and nursery phase. Polyethilen glycol (PEG)-6000 was often used
in the germination media as a osmotikum solution to indirectly select the drought resistance
plants. The study aimed to obtain the response information of 20 genotypes of papaya
germplasm to drought in the early phase of growth. The research was conducted in the
screenhouse of KP Sumani, Tropical Fruit Research Institute from January to December 2015.
The study consisted of two phases, namely the germination and nursery phase. The research
design used was a randomized block design of two factors. In the germination phase, the first
research factor was PEG-6000 concentration, namely field capacity (without PEG-6000), 10%
PEG-6000, and PEG-6000 15%, whereas the second factor was20 genotypes of papaya. In the
nursery phase, the first factor was moisture content, comprised of media FC, FC-PEG, 50% FC,
FC-PEG 50%, whereas the second factor was 5 papaya genotypes which were selected from the
germination phase. The results showed that the drought resistance selection in the seed
germination phase based on germination perentage and seed vigor index> 60% in a concentration
of 15% PEG-6000, genotypes 18,19, 28,29, and 20were selected. The results also showed that
the height plants grew in polybags was strongly influenced by drought stress either given during
germination and nursery phases. Value on drought vulnerability index both of germination and
nursery phases, 20 genotypes of papaya germplasms were chatagorized as relatively droughtresistant |
