论文部分内容阅读
对采自我国新疆的６份旱麦草属材料进行的形态学和细胞学研究发现，编号为Ｚ１１５７、Ｚ１１５９和Ｚ１１６０的材料均属于东方旱麦草，并建议将东方旱麦草的分种特征中“颖及外稃被有绒毛”修改为“颖及外稃有或无绒毛”；Ｚ１１５８和Ｚ１１６４为旱麦草，Ｚ１１６５为毛穗旱麦草。对上述材料和来自中东的另５份材料进行的观察发现，旱麦草属植物突出表现为：植株矮小，栽培条件下株高为２９．１～５７，２ｃｍｉ分蘖力极强，单株有效分蘖数多数超过１００个；花序短而宽，穗长变化于１．９～５．７ｃｍ之间，而穗宽达１．５～３．４ｃｍ；小穗密集，密度达３７～８９个／１０ｃｍ花序；其早熟特性表现为开花一成熟所需时间短，致使成熟期普遍早于普通小麦对照。抗病性鉴定表明，该属植物为小麦白粉病和黄矮病的良好抗源，并鉴定出３份抗白粉病资源以及５份兼抗白粉病和黄矮病的资源。研究还发现，旱麦草属植物亦具有冬春性分化，１１份材料中８份表现冬性或弱冬性。
Morphological and cytological studies on 6 Hypnotis materials collected from Xinjiang of China found that materials numbered as Z1157, Z1159 and Z1160 belonged to P. australis and suggested that “ And nephew were fluffy ”to“ Ying and nepheline with or without hair ”; Z1158 and Z1164 for the dry grass, Z1165 for the gross dry grass. The above materials and the other from the Middle East, the other five observations found that Pomaceae prominent performance: plant dwarf, plant height 29.1 ~ 57,2 cmi, strong tillering ability, the effective number of tillers per plant Mostly over 100; short and wide inflorescences, spike length varied from 1.9 to 5.7 cm, and spike width 1.5 to 3.4 cm; spikelets dense, with a density of 37 to 89 per 10 cm inflorescence; Its precocious trait is characterized by a short time of flowering-ripening, which leads to the maturity generally earlier than that of the common wheat. Resistance to the disease indicated that the genus was a good source of resistance to wheat powdery mildew and yellow dwarf and identified 3 sources of powdery mildew resistance and 5 sources of resistance to powdery mildew and yellow dwarf. The study also found that the genus Pirandi also has winter and spring differentiation, 11 of the material in the performance of 8 winter or weak winter.