试论四川省当前玉米育种工作的几个问题

本文借鉴“中单二号”玉米品种在我省推广应用的成功经验,对当前我省玉米育种工作提出三点意见;1.不能脱离生态分区育种来谈广谱适应性品种的选育问题。2.一个品种在生产上应用推广的成功需要借助于良种、良法、以及与之适宜的耕作制度的配套。3.育种工作者必须坚持与种子工作紧密的结合,育种工作者放松繁育环节是严重的失误。     

杂交水稻旱地大苗育秧应用种衣剂研究初报

本文研究了四川农大研制的水稻种衣剂在旱地大苗育秧上的应用效果．初步结果表明，用R_2，R_4和R_6号水稻种衣剂进行种子包衣，能显著提高秧苗素质，增加有效稳和千粒重，增产3－5％．旱育秧使用包衣种子，还可免去苗床调酸消毒环节，达到简化育秧程序、节省成本和增产增收的效果，值得进一步推广应用．     

玉米种子蛋白质电泳鉴定品种的研究──醇溶蛋白和盐溶蛋白的比较

用十二烷基碘酸钠聚丙烯酰胺凝胶电泳（ＳＤＳ－ＰＡＧＥ）对玉米种子醇溶蛋白和盐溶 蛋白分别用于区分不同品种的效果作了比较。种子醇溶蛋白采用了７０％乙醇和 ５５％异丙醇两种溶剂分别提取。结果表明，两种溶剂提取的醇溶蛋白ＳＤＳ－ＰＡＧＥ 带谱均较简单，品种间差异小，难以把各供试品种互相区分开来。而种子盐溶 蛋白则显示出丰富的带谱，品种间在谱带数目、带的分布与强弱等特点均可见 较明显的差异，据此可将各供试品种互相区分开来．杂交后代中，还可见到某 些“杂种带谱”。利用玉米种子盐溶蛋白ＳＤＳ－ＰＡＧＥ在玉米品种鉴定中显示了一 定的应用潜力。     

从现有小麦品种中筛选抗穗发芽变异的初步研究

本研究对四个穗发芽抗性有差异的品种（品系）的成熟期穗发芽抗性和种子休眠性进行四年连续混合选择。其中宜宾白麦子的选择群体穗发芽率和Ａ７４２９－７的选择群体的种子发芽率均较未选择群体低,并且达到显著水平。四个品种（系）的穗发芽率和种子发芽率的变异度均较原始群体增大,从变异的分布范围看,主要是由于发芽率的低值降低引起,其中宜宾白麦子的种子发芽率与穗发芽率和Ａ７４２９－７的种子发芽率的变异增加达显著水平。而蓬安白麦子和永川白麦子无论种子休眠和穗发芽抗性的选择平均效应及其变异度均与原始群体无显著差异。研究结果表明,在一些稳定群体（品种和品系）中穗发芽抗性可以通过选择而得到改良,但这种选择改良不是对所有群体均有效。     

应用因子分析综合评价水稻种子活力

用因子分析对１３个水稻杂交组合及其５个亲本种子的有关种子活力的形态生理指标作了分析。将种子活力指标分为三种类型,并对各杂交组合及亲本的种子活力高低进行了排序。     

小麦种子活力与产量的关系

小麦同一品种,大粒种子较小粒种子活力高;粒度相同,先萌发的种子较随后萌发的种子活力高。高活力的种子表现出分蘖、抽穗、开花提早,速度快而整齐;大粒种子比小粒种子平均增产32.2％,第3天萌发的种子平均比第5天、第第7天萌发的种子分别增产26.7％和59.3％,高活力的种子苗期有较多的分蘖成穗是获得高产的最重要原因。     

Advances in reproductive biology and seed production systems of Eucalyptus: the case of Eucalyptus globulus

Eucalyptus globulus is the main eucalypt species grown in Australian plantations. The focus on seedling deployment systems, coupled with exploitation of large, open-pollinated base populations for breeding purposes over the last two decades, has required a detailed understanding of the reproductive biology of this species. We review our research on the reproductive biology of E. globulus, with a focus on its breeding system and advances made in seed production systems. While most improved seed is still obtained from open-pollinated seedling or grafted seed orchards, the development of the one-stop/single-visit pollination procedure has revolutionised the breeding and deployment of this species. The reduced costs of controlled pollination has meant full pedigree-control can now be maintained in large advanced-generation breeding populations and E. globulus is one of the few eucalypt species where large-scale production of manually pollinated seed for family forestry is being undertaken.     

SEED算法S盒代数性质研究

对韩国分组密码标准SEED算法两个S盒S1、S2的密码学性质进行了深入的分析，研究了其差分性质、线性结构、平衡性、非线性等性质，通过与美国的高级加密标准AES、欧洲的分组加密标准Camellia的S盒作比较，揭示SEED算法S盒所拥有的一些较好的安全特性。     

电子自控技术在林木良种繁育中的应用

对电子间歇自动喷雾装置应用于林木良种繁育作了改进与新设计,使装置灵敏度、稳定性大大提高,并能满足不同树种或材料的需湿条件,提高了繁殖效果.     

The influence of sowing rate on the production and growth of wild oat (Avena fatua) in the depleted semi-arid rangelands of Jordan

The objective of this work was to determine the proper sowing rate of wild oat (Avena fatua) in the depleted north-eastern semi-arid grasslands of Jordan. Wild oat seeding rates of 15, 30, 45 and 60 kg ha^?l were evaluated in field studies that were conducted over two years at Jordan University of Science and Technology Campus located 22 km to the east of Irbid, Jordan. Measurements recorded each year included plant height, number of tillers per plant, oven-dry forage mass and seed yield. Forage and seed production increased in response to increasing sowing rate. The highest production values were obtained at a sowing rate of 45 kg ha^?l Increasing sowing rate to 60 kg ha^?l reduced both forage and seed yield, indicating that the optimum seeding rate for wild oat is 45 kg ha^?1 Forage and seed yield had a cubic relationship with sowing rate, having R² values of 0.55 and 0.78, respectively. Tiller production showed a negative linear relationship with sowing rate (R² = 0.35).