Growth performance and morphological variation including sex ratio in calamus subinermis provenance cum progeny trials in Sabah

Chia, Fui Ree (2009) Growth performance and morphological variation including sex ratio in calamus subinermis provenance cum progeny trials in Sabah. Masters thesis, Universiti Malaysia Sabah.


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Survival percentage and growth performance of Calamus subinermis at different sites with different soil types, terrain, climate, canopy opening and espacement was investigated in the 14 years old provenance cum progeny trial located at Sook, Segaliud Lokan and Kolapis A. These studies indicated that the survival and growth rate of C subinermis varied between sites and provenances. High survival percentage was observed in Sook's plot while Kolapis A and Segaliud Lokan plots had high mortality percentage. However, the growth rate was significantly higher in Kolapis A and Segaliud Lokan compared to Sook's plot. The growth performance of C subinermis was highly affected by surrounding environment. This was indicated by the different growth increment of different trait at different sites which shows the interaction between genotype and environment. However, provenance site interaction only occurred in stem diameter and number of suckers. Thus selection for stem diameter and number of suckers traits are not restricted to planting site. The non-significant difference in provenance site interaction indicated that total stem length and internode length traits are site specific. Therefore, the best provenance for breeding in total stem length were provenance Kota Marudu, Lawas and Tandek in Sook; provenance Tamparuli, Tuaran and Penampang in Segaliud Lokan and provenance Tuaran, Pulau Tigaand Kota Belud in Kolapis A. Morphological variation in C subinermis was evaluated in the provenance cum progeny trial in Kolapis A. Variations were occurred among provenances of this species. It was noted that stem diameter and internode length had a high provenance, family and individual heritability value as compared to other traits. The superior morphological trait like thornless leaf sheath had a low heritability value. The thornless leaf sheath trait was highly correlated to stem diameter. To complement the future breeding program, the sex ratio and the occurrence of andromonoecius individual of this species were determined in these trials. The female bias was observed in C subinermis population in fertile site like Kolapis A and Segaliud Lokan. The observed andromonoecy individual in Kolapis A indicates possible natural and artificial pollination in this species. The morphological variations among provenances indicated that future improvement program should concentrate on the provenances which geographically far away as some of these families are suspected to be full-sib.

Item Type: Thesis (Masters)
Uncontrolled Keywords: growth performance, morphological variation, Calamus subinermis, progeny trial, provenance
Subjects: S Agriculture > SB Plant culture
Divisions: SCHOOL > School of International Tropical Forestry
Date Deposited: 13 Jun 2013 05:09
Last Modified: 06 Oct 2017 08:48

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