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| Morphological Variation Analysis of Different Paphia textileGeographical Populations Along the Coast of Beibu Gulf |
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| DOI：10.16768/j.issn.1004-874X.2022.07.014 |
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| Abstract: |
| 【Objective】The study was carried out to explore the morphological differences among three Paphia textile
populations, which was of great importance for germplasma resources conservation, geographical populations identification
and artificial breeding of P. textile populations along the coast of Beibu Gulf.【Method】Based on 5 multivariate analysis
methods (morphological characteristics analysis, variance analysis, principal component analysis, discriminant analysis
and cluster analysis) were used to compare and analyze the morphological differences among three wild populations of P.
textile in Beihai , Zhanjiang and Dongxing.【Result】The Beihai population in Guangxi had the most round shell, thicker
shell and fuller soft part. The average shell height coefficient was 0.585, shell thickness coefficient was 0.033, shell weight
coefficient was 0.388, and soft part weight coefficient was 0.134. The Dongxing population in Guangxi had thin and light shell with the flattest shell type. The average shell height coefficient was 0.571, shell thickness coefficient was 0.032, and
shell weight coefficient was 0.135. The Zhanjiang population in Guangdong had thick shell with the lowest shell uplift degree.
The shell width coefficient was 0.366, shell thickness coefficient was 0.035, and shell weight coefficient was 0.325. Three
principal components were obtained by the principal component analysis method, the contribution rates of principal component
1, principal component 2 and principal component 3 were 37.366 22.205% and 12.718%, respectively; and the cumulative
contribution rate was 72.289%. Then, the discrimination functions of the 3 populations were set up, the identification accuracy
was 94.00%-100.00% (P1
) and 92.11%-100.00% (P2
) and the total discriminate accuracy was 97.56%. The results of cluster
analysis indicated that the morphological characteristics of Zhanjiang population were similar to those of Beihai population,
but quite different from those of Dongxing population. In addition, Dongxing population had the highest degree of divergence.
【Conclusion】Compared with the Beihai population in Guangxi and the Zhanjiang population in Guangdong, the Dongxing
population in Guangxi has the largest differences in morphology, and among individuals within the population, while the
morphology of the Beihai population in Guangxi is more similar to that of the Zhanjiang population in Guangdong. |
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