【摘要】 为了综合评价木麻黄Casuarina equisetifolia家系种子品质并揭示种子特性、变异规律等对苗期生长的影响,对9个家系(湛江采种母树林)种子形态、千粒重、发芽特性、田间出苗率、育苗成活率和苗期生长量(6月龄、14月龄)进行测定分析。研究表明,木麻黄种子形态性状、千粒重(1.020～1.872 g)、发芽率(2.7%～67.3%)、发芽势(1.3%～66.0%)、发芽指数(0.26～10.24)及田间出苗率(2.5%～24.4%)在家系间均达到极显著差异水平(P<0.01),种子发芽率与发芽势、发芽指数呈显著正相关(P<0.05),千粒重与种子形态、发芽率、发芽势、发芽指数呈极显著正相关(P<0.01),与育苗成活率、苗期生长量相关不显著, GD20、 GD22、 GD23这3个家系千粒重较大,发芽率较高,发芽迅速、整齐,苗期生长较快,可作为木麻黄育苗的首选家系。更多还原

【Abstract】 To comprehensively evaluate the seed quality of excellent families of Casuarina equisetifolia and to reveal the impact of seed characteristics and variation patterns on seedling growth,the seed morphological characteristics,thousand-seed weight,germination traits,field emergence rate,seedling survival rate,and seedling growth from nine families(collected from the mother tree forest in Zhanjiang) were measured and analyzed. The study revealed that seed morphological traits,thousand-seed weight(1. 020 g to 1. 872 g),germination rate( 2. 7% to 67. 3%),germination potential( 1. 3% to 66. 0%),germination index( 0. 26 to 10. 24),and field emergence rate(2. 5% to 24. 4%) all showed extremely significant differences among families(P<0. 01). The germination rate was positively and significantly correlated with germination potential and germination index(P <0. 05). The thousand-seed weight was significantly positively correlated with seed morphology,germination rate,germination potential,and germination index(P<0. 01),but not significantly correlated with seedling survival rate and seedling growth. The families GD20,GD22,and GD23 had heavier thousand-seed weight and higher germination rates,rapid and uniform germination,and faster seedling growth,which can be used as the preferred families for C. equisetifolia seedling cultivation.更多还原