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首页> 外文期刊>Journal of Arboriculture >Hybridization and self-compatibility in controlled pollinations of eastern north American and Asian hemlock (Tsuga) species
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Hybridization and self-compatibility in controlled pollinations of eastern north American and Asian hemlock (Tsuga) species

机译：北美东部和亚洲铁杉（Tsuga）物种在控制授粉中的杂交和自交配

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摘要

Controlled pollinations were made between five hemlock (Tsuga) species from eastern North America and Asia. Resulting seeds were collected and planted, and more than 5,700 seedlings germinated. A selected number of putative hybrids from each cross were tested for authenticity by DNA fingerprinting. Attempts to hybridize T. canadensis (eastern hemlock) with three Asiatic species were unsuccessful. However, 59 authentic hybrids from crosses between T. caroliniana (Carolina hemlock) and T. chincenis (Chinese hemlock) were identified. Crosses between the Asiatic species also were successful. Selfing was demonstrated in all species. Further studies are needed to determine the nature of the crossability barrier between T. canadensis and the Asiatic species. Because eastern native hemlocks are suffering injury from the introduced pest hemlock woolly adelgid (Adelges tsugae), fundamental information of this type may enable plant breeders to successfully hybridize adelgid-tolerant species with the susceptible native hemlock species to create new trees that are both tolerant to the adelgid and horticulturally desirable.
机译：在北美东部和亚洲的五个铁杉（Tsuga）物种之间进行了控制传粉。收集并种植得到的种子，并发芽了5,700多个幼苗。通过DNA指纹图谱测试了每个杂交中选定数量的推定杂种的真实性。尝试使加拿大T. canadeensis（东铁杉）与三种亚洲物种杂交成功。然而，鉴定出来自T. caroliniana（卡罗来纳州铁杉）和T. chincenis（中国铁杉）之间的杂交的59个真实杂种。亚洲物种之间的杂交也很成功。在所有物种中都证明了自交。需要进行进一步的研究来确定加拿大山毛榉和亚洲物种之间的可交叉性屏障的性质。由于东部本地铁杉正在遭受引入的害虫铁杉羊毛阿德吉德（Adelges tsugae）的伤害，这种类型的基本信息可以使植物育种者成功地将耐阿德吉德的物种与易感的本地铁杉物种杂交，从而创造出既可以耐受又可以耐受的新树。 adelgid和园艺理想。

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