Biometric Analysis on Genetic Divergence between Parental and Regenerated Accessions in Tall Coconut Palms (Cocos nucifera L.) from International Genebank for Africa and the Indian Ocean

This study endeavour assesses agromorphological likeness between initial introductions and regenerated accessions at the International Coconut Genebank for Africa and the Indian Ocean (ICG-AIO) based in C?te d’Ivoire. Ten couples of parental (G0) and regenerated (G1) accessions of Tall coconut palms were analyzed using Principal Component Analysis (PCA) and Multiple Analysis of Variance (MANOVA) from 26 agromorphological characters. The main results showed a relative decrease in the expression of the phenotypical traits concerning the component of the fruit, height and vigor of the stem and yield of bunches and fruits after one regeneration cycle. But, a high proportion (69%) of studied characters from leaf, inflorescence and nut components showed likeness between G0 and G1 accessions. After one regeneration cycle, the controlled pollination method guarantees significant conservation of the expression of the majority of agromorphological traits. Consequently, regenerated accessions of Tall coconut palms can be used to pursue research and development programs in C?te d’Ivoire.

文昌市椰子资源果实表型和品质综合评价

为了更好地开展椰子品种选育工作,以文昌市62份椰子资源的果实为材料,测定果实重量、椰子水重量、果形指数、可溶性固形物、维生素C、蛋白质含量和氨基酸含量等主要果实性状,对其进行相关性分析、主成分分析、聚类分析和综合排序。结果表明,果实表型和品质性状存在不同程度的变异,变异系数为7.29%~43.31%,其中蛋白质含量的变异系数最大,椰子水口感等果实风味指标存在中等的变异程度,pH值的变异系数最小。有28对指标的相关性达到了显著水平,101对指标的相关性达到了极显著水平。主成分分析提取了7个主成分,累积贡献率为80.85%。根据主成分分析结果计算得分并排序,DJ150、PL163、WC105、DG133、CX032、DJ014和DG135综合排名最高,果实品质较好。结合聚类分析的结果,最终筛选出DJ150、PL163、WC105、CX032和DJ014五份优质椰子资源,并将椰子果实品质评价因子简化为5个指标,分别是固酸比、维生素C、氨基酸、椰肉口感和可溶性固形物。研究结果可以为高种椰子品种选育工作提供数据支持。

椰树风情 人生滋味——丘濬《椰林挺秀》诗赏析

丘濬的《椰林挺秀》诗是一首形象鲜明、风味别致的写景咏物诗。诗人选取自己所熟悉的南国风物作诗歌咏,既生动传神地刻划了景物的形态风姿以及随风雨阴晴而变的独特景观,也在写景咏物之中隐然寄托了他那亲近自然的心愿和热爱生活的情怀。由于诗人具有良好的诗学修养,加之对所写景物能了然于胸中,故而写起景物来娴熟老到,得心应手,颇见艺术功力。该诗在取材、风格、语言等方面跳脱了明代前期台阁体的影响,给人以耳目一新的感受。

几种农药防治椰心叶甲的效果比较

新近传入海南的危险性害虫———椰心叶甲 ,威胁着椰树及其它棕榈科植物的安全。选用5种农药对高杆椰树进行茎干注射和根部埋药防治椰心叶甲试验 ,结果表明 ,3 %呋南丹颗粒剂 ,30%乙酰甲胺磷乳液比其它3种农药效果好。