不同节位段丝瓜留种种子质量鉴定

Quality Identification for Seeds of Luffa at Different Nodal Segment

选用南京蛇形丝瓜为试验材料主蔓 2 1～ 30节、 31～ 40节、 41～ 49节留种 ,以主蔓 2 0节以下留种作对照 ,比较不同节位段种子的千粒重、单瓜种子数、单瓜种子重量、发芽率、发芽势、酶活性及种子种植后第一雌花节位。试验结果显示 :随着主蔓留种节位段的升高 ,种子千粒重呈下降趋势 ,而单瓜种子数 ,则呈上升趋势 ,单瓜种子重量以 41～ 49节最高 ,其它节位段则无明显差异。田间发芽率和发芽势以对照最高 ,其次是 31～ 40节 ,不同节位段种子过氧化物酶 (POD)、多酚氧化酶 (PPO)、苯丙氨酸转氨酶 (PAL)活性差异性不一致 ;不同节位段种子种植后第一雌花节位无显著差异 ,在生产上可留 2 0节以内的种瓜作原种 ,留 30节以内的种瓜作生产用种。

The experiment selected Nanjing sepiform Luffa as test material which is reserved seed for planting at 21-49 nodes of main vine, taking below 20 nodes of main vine as control group, to compare the qualities of seeds of Luffa at differeent nodal segment such as 1000-grain weight, seed quality and quantity of single towel gourd, germination percentage and energy, enzyme activity and the node location of the first female flower. The results indicate that with the rising of node location for reserving seed, there is an upward trend in 1000-grain weight of seeds, while the trend of seed quality of single towel gourd is downwards. There are no obvious differences in seed weight among different nodes with the exeption of highest weight at 41-49 nodes.The control group is highest in germination percentage and energy, and then the 31-40 nodes. The active differences of POD, PPO and PAL of seeds at different nodes are not same, and the first female flower nodes also show no remarkable differences, so the seed gourd at below 20 nodes can be used for original seed in production, and the ones below 30 nodes can be used for production.[HJ5:1]