Pollen fertility at different flowering times and its effect on seed setting of some bitter gourd (Momordica charantia L.) varieties in Ho Chi Minh city

Ministry of Science and Technology, Vietnam Pub Date : 2024-02-25 DOI:10.31276/vjst.66(2).39-43

Dang Thai Phuong Phan, Thuy Duong Nguyen, Van Ba Vu

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Abstract

In the hybridisation process, pollen grains directly participate in the process through flower pollination. Pollen grain quality determines fruit formation and seed setting. In this study, the pollen grains of the local bitter gourd variety (BD2) and F1 commercial variety were collected at 8 different flowering times (8-11h30) for fertility evaluation in the 2020 Spring-Winter crop season in Ho Chi Minh city. Self-pollinate the 2 varieties over 8-9 hours to evaluate their ability to set seeds. The obtained results indicated that the local variety (BD2) had the highest fertility pollen (61.26%) at 08:30 am and the lowest (46.22%) at 9:00 am. Meanwhile, the F1 commercial variety showed the highest fertility pollen (94.05%) at 11:30 am and the lowest (79.58%) at 8:00 am. The fertility of variety BD2 is 60.21%, resulting in 33.50 seeds per fruit in which the percentage of mature seed is 71.72%. Similarly, the commercial variety found the pollen fertility is 85.55%, resulting in 11.25 seeds per fruit in which the percentage of mature seeds is 84.90%. This information is useful for bitter gourd hybridisation.

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胡志明市一些苦瓜（Momordica charantia L.）品种不同花期的花粉育性及其对结籽的影响

在杂交过程中，花粉粒通过花朵授粉直接参与杂交过程。花粉粒的质量决定了果实的形成和种子的结实。本研究收集了当地苦瓜品种（BD2）和 F1 商用品种在 8 个不同花期（8-11h30）的花粉粒，用于胡志明市 2020 年春-冬作物季节的育性评价。在 8-9 小时内对这 2 个品种进行自花授粉，以评估其结籽能力。结果表明，当地品种（BD2）在上午 8:30 时的花粉结实率最高（61.26%），在上午 9:00 时的花粉结实率最低（46.22%）。而 F1 商用品种在上午 11:30 时的花粉结实率最高（94.05%），在上午 8:00 时的花粉结实率最低（79.58%）。品种 BD2 的花粉受精率为 60.21%，每个果实产生 33.50 粒种子，其中成熟种子的比例为 71.72%。同样，商品品种的花粉受精率为 85.55%，每果结籽 11.25 粒，成熟种子率为 84.90%。这些信息对苦瓜杂交很有帮助。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Ministry of Science and Technology, Vietnam

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