Growth of hybrids between the common and early ecotypes of Imperata cylindrica
Growth of hybrids between the common and early ecotypes of Imperata cylindrica
复制标题
白茅普通生态型和早期生态型杂交种的生长
DOI：
10.1111/grs.12155
复制
发表时间：
2017
影响因子：
1.3
通讯作者：
T. Tominaga
中科院分区：
文献类型：
--
作者：
Ikuya Miyoshi;T. Tominaga
以普通生态型（C-）和早熟生态型（E-）的白茅（Imperata cylindrica（L.）Raeusch.）与他们的父母进行比较，以澄清他们潜在的入侵性。每个人工杂种及其亲本各6个分株，共276个分株（6个分株× 22个C-和E-型间杂种（CE-杂种），6个分株× 22个E-和C-型间杂种（EC-杂种），6个C-型亲本分株和6个E-型亲本分株）于5月单独移植到直径21 cm × 16 cm深，3300 cm 3的粘土盆中。将种植有CE-杂种、EC-杂种、C-型亲本和E-型亲本的粘土盆的一半（每个克隆的三个分株）放置在潮湿条件下（潮湿地块），其中所有粘土盆保持在距盆底9.5 cm深的水中。作为对照，将剩余的陶罐放在地上。在11月收获所有分株并测量其干重。在湿土中，E型比C型生长得更好。CE-杂种和EC-杂种对地下水位表现出广泛的生长反应，一些杂种在对照和湿润条件下均上级其亲本。在东北地区，杂交种广泛分布，杂交会使两个亲本类型融合成一个单一的种群，从而导致它们的灭绝。
Growth of hybrids between the common‐ (C‐) and early‐ (E‐) ecotypes of cogongrass (Imperata cylindrica(L.) Raeusch.) was compared with their parents to clarify their potential invasiveness. Six ramets of each artificial hybrid and their parents, a total of 276 ramets (6 ramets × 22 hybrids between C‐ and E‐type (CE‐hybrids), 6 ramets × 22 hybrids between E‐ and C‐type (EC‐hybrids), six ramets of C‐type parent and six ramets of E‐type parent) were transplanted individually into clay pots (21‐cm diameter × 16‐cm depth, 3300 cm3) in May. Half of the clay pots planted with CE‐hybrids, EC‐hybrids, C‐type parents and E‐type parents, three ramets of each clone, were placed in wet conditions (wet plot), in which all of the clay pots were kept in water 9.5 cm deep from the bottom of the pot. As controls, the remaining clay pots were placed on the ground. All ramets were harvested in November and their dry weights were measured. The E‐type grew better than C‐type in the wet plot. CE‐hybrids and EC‐hybrids showed a broad range of growth response to groundwater level and some hybrids were superior to their parents under both control and wet conditions. In the Tohoku region, the hybrids are commonly distributed, hybridization can cause the two parent types to fuse into a single population and would result in their extinction.