Temporal diversity of Taraxacum kok-saghyz plants reveals high rubber yield phenotypes.
Temporal diversity of Taraxacum kok-saghyz plants reveals high rubber yield phenotypes.
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DOI：
10.13057/biodiv/d170262
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发表时间：
2016-01-01
期刊：
影响因子：
--
通讯作者：
Streeter, J. G.
中科院分区：
文献类型：
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作者：
Cornish, K.;Kopicky, S. L.;Streeter, J. G.
蒲公英（Taraxacum koksaghyz）是一种二倍体、异交的橡胶生产品种，正在开发作为替代天然橡胶作物。从20种野生收集植物的后代中获得约17，650粒种子。在俄亥俄州，从这些种子的随机子样本中培育出了新的植物种群，然后进行自由授粉。2011年11月，这些种子直接播种在室外浅养床和高隧道深养床中。从2012年7月至2013年7月从室外床收获植物，以提供植物发育和越冬时的时间表型数据。2013年7月收获了高隧道床，并提供了11个个体加入及其后代的数据，以及冬季床加热的影响。植物是高度可变的。根组织中的橡胶浓度与根、茎或植株大小没有直接关系。在所有生长条件和发育阶段，每株橡胶产量最高的植物是根大、莲座大且橡胶浓度高于平均水平的植物。这些参数似乎独立分离，橡胶浓度是可遗传的。杂交选择的植物大根，大莲座丛，然后高橡胶浓度，应迅速移动蒲公英kok-saghyz走向驯化和商业化。
Taraxacum koksaghyz is a diploid, out-crossing, rubber-producing species under development as an alternative natural rubber crop. About 17,650 seed were obtained from progeny of 20 wild collected plants. New populations of plants were developed in Ohio from a random subsample of these seed, which were then open pollinated. In November 2011, these seed were direct seeded in outdoor shallow raised beds and in high tunnel deep raised beds. Plants were harvested from the outdoor beds from July 2012 to July 2013 to provide temporal phenotypic data as plants developed and overwintered. The high tunnel beds were harvested July 2013, and provided data on 11 individual accessions, and their progeny, and on the effect of winter bed heating. Plants were highly variable. Rubber concentration in root tissue was not directly correlated with root, shoot or plant size. Across all growing conditions and developmental stage, the highest rubber yields per plant were found in plants with large roots combined with a large rosette, and an above average rubber concentration. These parameters appeared to segregate independently, and rubber concentration was heritable. Interbreeding plants selected for large root, large rosette and then high rubber concentration, should rapidly move Taraxacum kok-saghyz towards domestication and commercialization.