| From april2012to march2013, in Yunnan Grassland Research Institute of AnimalScience researches the morphological and agrictural characteristics of two cocksfoot(Dactylis glomerata) subspecies, eight materials in all. The one distributed the HengduanMountains is Himalayensis, the other distributed the Mediteranean region is Hispanica. Inorder to lay foundation for new varieties of cocksfoot. The results showed that:1. There are tremendous differences in Himalayensis and Hispancia. Himalayensis has tall plant,drooping inflorescence, long and wide blade, obsolete cilium in seed costa. Hispancia has low plant,upright inflorescence, short and thin blade, obvious cilium in seed costa.2. Himalayensis and Hispancia are strictly self-infertility. Some agronomic traits are complementary.Himalayensis’ annual forage yield and seed production capacity are better than Hiapanica.Hispanica tiller regeneration, autumn and winter reproducibility are better than Himalayensis.3. Different Himalayensis meterials have large difference between morphological charecterics andagronomic traits. PI221085have high forage yield, low plant, fine tillering and regeneration.PI265565growing fast in winter, tall plant, good tillering and regeneration. PI249730are best onforage seaon balance. PI17034have low plant, slender leaves, strongly reproductive ability. Theyhave further development and utilization values.4. Himalayensis and autoteraploid have differences in morphological and economical charaters. Theautoteraploid vegetative organs tend to be smaller, but reproductive argans tend to larger.Homologousploidy has higher forage yield, more uniform seasonal distribution, growing faster inwinter, stronger tillering and renewanle. These illustrate chromoaomes doubling effectivelyimprove the problems of poor tillering, growing slow in winter, low forage yield and unevendistribution in Himalayensis. That means chromosome doubing technology is value in Dactylisglomerata breeding. |
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