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2 results on '"Parnidi"'

1. HERITABILITY OF KENAF (Hibiscus cannabinus L.) RESISTANCE TO ROOT-KNOT NEMATODES (Meliodogyne incognita).

Author

PARNIDI, SOETOPO, L., DAMANHURI, and MARJANI

Subjects
*SOUTHERN root-knot nematode, *KENAF, *ROOT-knot nematodes, *HERITABILITY, *STUNTED growth, *PLANT yields
Abstract

Root knot nematode (Meloidogyne spp.) (RKN) is a plant-parasitic nematode of kenaf. RKN infestation on roots may lead to stunted plant growth in plants and a reduction in yield potential. The inheritance of resistance in kenaf to RKN M. incognita was investigated by crossing two different genotypes of kenaf: Karangpolos 1 (KR1), which is very susceptible to root-knot nematode with Karangploso 15 (KR15), which is moderately resistant to root-knot nematode. Resistance was evaluated using several variables, including the number of rootknot nematodes, reproductive factors, the number of 2nd stage juveniles, the number of egg mass, and the average number of eggs per egg mass. This study found that female parental genotypes did not significantly contribute to kenaf resistance to root-knot nematode. Partial dominance of a single gene was predicted to be responsible for the resistance to RKN M. incognita. The gene effects to all of resistance variables tested were mainly additive and dominant; additive variance was greater compared to dominant variance. The broad-sense heritability value and the narrow-sense heritability value kenaf resistance to RKN M. incognita for all variables were high. The results of this study are useful for determining the appropriate selection model for kenaf plant resistance to RKN M. incognita. [ABSTRACT FROM AUTHOR]

Published
2021

2. Evaluation of vigor and viability of mutated jute seeds.

Author

Murianingrum, M., Utari, D., Suhadi, Slamet, Hidayat, T. R. S., Parnidi, Rahayu, F., Marjani, and Purwati, R. D.

Subjects
*GAMMA rays, *SEED viability, *JUTE fiber, *GERMINATION, *PACKAGING materials, *RADIATION doses
Abstract

Jute fiber has long been known and used as a raw material for packaging agricultural products and is now being developed to support various industries. Improving fiber quality is important in supporting the development use of jute fiber in various industries. The aim of the study was to determine the percentage of vigor and viability of jute seeds with various doses of gamma ray radiation to improve the quality of jute fiber through mutation breeding. The study used a two-factor completely randomized design. The first factor consisted of three jute accessions, namely Branca, Halmahera, and Roxa. The second factor consisted of 12 gamma radiation doses, namely 450 Gy, 500 Gy, 550 Gy, 600 Gy, 650 Gy, 700 Gy, 750 Gy, 800 Gy, 850 Gy, 900 Gy, 950 Gy and control (without mutation treatment). The results showed that there was a significant effect and interaction between accession and radiation dose on the vigor and viability of jute seeds. The dose of 950 Gy increased the germination and simultaneous growth of Branca (9.09 % and 10.40 %) and Halmahera (6.74% and 6.78%). Gamma ray radiation decreased the radicle and hypocotyl length in all accessions at all treatment doses, respectively between 22.79% - 63.54% and 12.91-68.45%, in addition there was an increase and decrease in radicle and hypocotyl dry weight in all accessions at each treatment dose. A dose of 950 Gy can be used as a radiation treatment to improve the quality of jute fiber of branca and Halmahera. [ABSTRACT FROM AUTHOR]

Published
2024
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