【摘 要】
：
本文按照格里芬(Griffing)方法Ⅳ,进行了10×10的完全双列杂交试验,对甘蓝型油菜中十个主要农艺性状的配合力和遗传参数进行了估算和分析。结果表明:在随机模型假定下,主花
论文部分内容阅读
本文按照格里芬(Griffing)方法Ⅳ,进行了10×10的完全双列杂交试验,对甘蓝型油菜中十个主要农艺性状的配合力和遗传参数进行了估算和分析。结果表明:在随机模型假定下,主花序长度、一次有效枝数这两个性状主要受非加性基因控制:全株有效果数主要受加性基因控制;其余七个性状则两种效应的影响都显著存在。遗传力以株高和千粒重较高,其余性状的遗传力都较低,早代选择应予主意.在固定模型的假定下,发现3—97矮和加拿大油菜适于作高产株型育种亲本,前者是密植类型,后者属稀植、单株高产类型。
In this study, a 10 × 10 full diallel cross was conducted according to Griffing method Ⅳ. The combining ability and genetic parameters of ten major agronomic traits in Brassica napus were estimated and analyzed. The results showed that under the assumption of stochastic model, the two main characters of main inflorescence length and effective primary branch number were mainly controlled by non-additive genes: the effective number of whole plant was mainly controlled by additive gene; the other seven traits had two effects The effects are all significant. Heritability was higher in plant height and 1000-grain weight, and the heritability of other traits was lower, and the selection of early generations should be taken as an idea.Under the assumption of fixed model, it was found that 3-97 dwarf and Canadian rape were suitable for breeding high-yielding plant type parents, The former is a close planting type, the latter is a thin planting, high yield type.
其他文献
考试作为评价学生学习效果的一种手段,有着导向、激励、反馈和调控等多方面的功能,理应成为学生学习世界中的亲密朋友。然而在很长一段时间里,考试成为一种残酷的象征,有的学生非常害怕考试,给学生造成了极大的心理负担。随着新课程的实施,作为数学教育评价主要方式之一的考试,如何体现新课程理念,如何促进学生更健康、持续的发展,让考试不再成为负担,笔者结合南康市近几年来考试命题改革情况,就考试命题谈一些粗浅的认识
Measurement and phenomenological analyses of intermittency growth in an experimental turbulent pipe flow and numerical turbulence are performed, for which worki
We experimentally study the physical mechanism of the drag reduction of hydrophobic materials in the macroscopic scale. The experiment includes the drag and vel
作者提出了用一阶导数谱辅助求 Raman 光谱峰值的新方法,较好地解决了谱峰与噪音的识别问题;编制了 SPEX_(1403)激光 Raman 光谱的标峰程序,具有10种不同大小尺寸的绘图功能
A Tm3+-doped ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) fibre up-conversion laser pumped by a 1120-nm Raman fibre laser is demonstrated with blue output power levels up to
小学数学教学不仅要让学生掌握数学知识,更重要的是逐渐使他们学会用数学去解决实际问题。这对于个人乃至整个民族、整个社会具有重要的意义。数学知识与数学能力、数学思想方法以及在数学学习中获得的自信、科学的态度、理性的精神等相比,后者显然更为重要。因此,笔者认为,在小学数学教学中,必须重视培养学生的良好个性,并通过各种途径努力实施,从而提高学生的综合素质。 在数学教学中培养学生的良好个性,教师要通过各种
Hawking radiation of Klein-Gordon and Dirac particles in a non-stationary Kerr-Newman-de-Sitter black hole is studied by introducing a new tortoise coordinate t
青茶是我国六大茶类之一,又是福建省出口骨干商品之一,具有浓而不涩,醇而不谈,清香鲜爽,冲泡多次仍有余香的独特品质风格,莆田市的农村推行农业生产承包责任制后,调动了生产
Based on the HVQMNR model of heavy flavour production and the BDMPS approach on parton energy loss, we have investigated the energy loss effect of charm quark o
本文提出一种模糊综合相似选择法,用以进行多目标决策。该法以模糊综合选择关系的选择水平关系为评价指标,对多目标问题不劣解集中各方案排序,为决策者选择满意解提供依据。