优质冬小麦新品种“河农341”

成果简介 该品种营养品质和食品加工品质优良，蛋白质含量17．23％，赖氨酸含量0．43％，沉降值49．1ml，最高达63．7ml，湿面筋含量48．9％，面团吸水率61％，稳定时间8．6min，面包体积795ml，面包评分83．5分，容重791g/l。该品种综合性好，幼苗匍訇，生长健壮，     

北农化控Ⅱ号乳油在小麦上试验初报

北农化控Ⅱ号20％乳油是北京农业大学作物化控室研制的复合剂型植物生长调节剂。1997年我团在冬麦返青和拔节期进行不同剂量叶面喷施，经各生育时期调查资料分析，茎基部1－3节间较对照缩短，收获稳增多，单产较对照增产。     

两种耐寒性不同的小麦低温处理后ATPase同工酶的变化

正常温度条件下（２５±１℃）培养的冬小麦京农Ｓ５１００、临远７０６９和春小麦津春４号、津春９号幼苗叶片内均显示出６条ＡＴＰａｓｅ同工酶谱带，芽鞘内则为９－１０条，表明ＡＴＰａｓｅ同工酶不能反映出两种类型小麦在耐寒性上的差异。１－４℃低温处理１－４周后，冬小麦和春小麦幼苗叶片及芽鞘内ＡＴＰａｓｅ同工酶谱均有所减少，叶片中由６条减至１条（ＡＴＰａｓｅ５），芽鞘由９－１０条减至２条（ＡＴＰａｓｅ６，ＡＴＰａｓｅ７），将１－４℃低温处理１－４周后的小麦幼苗转入正常条件下再培养１周，使其幼苗生长恢复正常，检测叶片及芽鞘内的ＡＴＰａｓｅ同工酶，发现各自均基本恢复到低温处理前的水平。     

播期对冬小麦叶面积及其结构的影响

1990～1991年,在石河子农学院农学试验站进行了不同品种、不同播期冬小麦生长分析的研究。结果表明:适期早播有利于冬前叶面积的生长、干物质的积累,同时对返青时的叶面积增长和干物质生产也有利。不同播期的叶面积系数动态和光合势动态只有量上的差异过程相似。播期对叶片的厚薄、器官之间干重比例无大的影响;播期对籽粒灌浆的量有影响,对其基本过程无影响。     

The VER2 promoter contains repeated sequences and requires vernalization for its activity in winter wheat （Triticum aestivum L.）

Previously, we isolated a vernalization-related gene, VER2, from winter wheat (Triticum aestivum L.) and its expression was restricted in the immature leaves of vernalized wheat seedlings. To further investigate the regulation of VER2 expression and the function of its promoter, we isolated a 41.7 kb genomic clone containing VER2 gene from atransformation-competent artificial chromosome (TAC) library of wheat (Triticum aestivum-Haynaldia villosa). The sequence analysis showed that there were eleven predicted genes in the TAC. The exons of gene 3 corresponded to the cDNA sequence of VER2 gene. Analysis of VER2 promoter structure showed that there were three small repeat sequences divided by two large repeat sequences. The putative response elements, such as abscisic acid response elements (ABRE), MeJA-response elements (Me-JARE), low-temperature response elements (LTR), endosperm expression elements, MYB binding sites and similar elements to GA response elements (GARE), were involved in the VER2 promoter region. Construct containing the VER2 promoter (-5895 to 73) driving GFP reporter gene was bombarded into vernalized or non-verualized immature leaves in wheat. The vernalized immature leaves showed bright green fluorescence after incubation for 24 h, however, the green fluorescence was not observed in the non-vernalization leaves under the same condition. These results suggested that vernalization was essential for the function of VER2 promoter in the immature leaves of winter wheat.     

WCSODS模型在徐州地区冬小麦种植常年决策中的应用

利用小麦栽培模拟优化决策系统(WCSODS)对徐州地区冬小麦种植的常年决策进行了模拟分析，对生育期和产量的模拟效果较好，模拟结果表明，徐州26的主要优化栽培措施常年决策为：10月10日前后播种，基本苗180万株／hm^2，施用纯N218kg／hm^2，基施P2O584kg／hm^2，K2O108kg／hm^2，同时注重综合防治病虫害．研究表明，WCSODS模型作某些参数调整后可直接应用于业务工作．     

利用GCM Transient Run生成我国冬小麦主产区的气候渐变情景

本文利用ＧＩＳＳＧＣＭＴｒａｎｓｉｅｎｔＲｕｎ模型生成了我国冬小麦主产区在公元２０１０年、２０３０年、２０５０年及达到ＣＯ２倍增的２０６２年的四种气候渐变情景,并模拟了我国在未来气候变化过程中气温及降水变幅的分布状况．初步分析了我国冬小麦生产可能受到的影响．     

寒胁迫对冬小麦拔节期叶片游离脯氨酸含量的影响

０－４℃低温处理小麦拔节期抗寒性不同的品种,随处理时间延长,叶片中游离脯氨酸含量增加,抗寒性强的品种游离脯氨酸的积累较多,表明植物抗寒性与叶片中游离脯氨酸积累有相关性。     

冀东平原冬小麦超高产育种探讨

根据冀东平原地理位置，冬小麦生长的生态条件，进行了冬小麦起高产育种的研究，建立了以主攻少蘖、大穗、大粒，兼顾抗病、早熟、抗旱、冬性的育种目标。经过多年选育工作，选育出了大穗、大粒、抗病、抗倒的超高型优良品系，为冀东平原冬小麦超高产育种工作奠定了基础。