Flowering pattern and effective population size in cajuput clonal seed orchard in Yogyakarta, Indonesia. Issue 1 (July 2021)

• Record Type: Journal Article
• Authors: Kartikawati, N K; Rimbawanto, A; Putri, A I
• Is Part Of: IOP conference series. Volume 800:Issue 1(2021)
• Publication Date: 2021-07
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/800/1/012041
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Clonal seed orchard (CSO) is established from superior trees vegetative material to produce the genetically improved seed. The flowering pattern and number of clone in CSO influence seed quality, genetic diversity and the possibility of inbreeding. The study aimed to determine the flowering pattern, identify effective population size and effective clone size in cajuput CSO. This was conducted in cajuput CSO in two sites, i.e. Gunungkidul and Sleman, during peak flowering. The cajuput CSO was established in a randomized complete block design using 30 clones in Sleman and Gunungkidul with five and eight replications, respectively. The flowering number of each individual, number of flowering ramet for each clone and number of capsule retention were recorded. The result showed that the clone performance (i.e., flowering and survival rate) in Sleman was better than in Gunungkidul. Two clones (i.e., number 14 of Provenance Suli, Ambon, and number 30 of Provenance Masarete, Moluccas) in Gunungkidul did not produce flower seed. The effective population size in Gunungkidul (Ne=26.20) is higher than in Sleman (Ne=25). However, the effective clone number in Gunungkidul (Nc=25) is lower than in Sleman (Nc=27). Genetic diversity in both CSOs is high (0.98). Therefore, the proportional mixing of seed collected from both CSO is essential to increase the genetic diversity and the realized genetic gain in deploying seeds for operational planting.