您现在的位置: 绿色健康网 >> 医学论文 >> 基础医学论文 >> 正文  

甘蓝型油菜长角果变异体的遗传研究

危文亮

摘 要:用在中国发现的甘蓝型油菜长角果变异体的优良后代“鄂油长角”及短角果品种“中油821”为亲本,研究了角果长及与角果长密切相关的两个性状——千粒重和每果粒数的遗传。结果表明,角果长、千粒重、每果粒数3个性状受核基因控制,不存在任何形式的母性遗传。供试双亲间角果长性状存在2对基因的差异。长角果对短角果为显性。数量遗传分析表明,角果长、千粒重的遗传符合加性显性二基因互作模型,存在显著的上位性效应。角果长性状在两个基因座上呈联合分布,显性效应均大于加性效应,且存在超显性。千粒重性状以加性效应为主。
关键词: 甘蓝型油菜; 长角果变异体; 世代均值分析; 基因数目
中图分类号: Q348; S565.4    文献标识码: A    文章编号: 0253-9772(2000)02-0093-03

Studies of the Inheritance of a Longpod Mutant in Brassica napus L.

WEI Wenliang
(The Oil Crops Research Institute,CAAS,Wuhan 430062,China)

Abstract:Eryou longpod,which was derived from the unique longpod mutant discovered in China,was crossed with the commercial broad rapeseed cultivar Zhongyou 821.From the crossing six basic generations were generated for studying the genetical behaviors of pod length and two related characters i.e.1000seed weight and seed number per pod.The results showed that the three characters were governed by nuclear genes.The difference in pod length between two parents was related to two loci.Generation mean analyses revealed that the 6parameter mode was to interpret the inheritance of the characters studied and the epistasis was significant.Pod length mainly showed association of its genes and highly significant dominant effect,and even superdominant effect too.Meanwhile,additive effect was predominant in 1000seed weight.
Key words: Brassica napus L.; longpod mutant; generation mean analyses; gene number

  甘蓝型油菜角果长一般为4~6 cm,平均角果长达8 cm的品种少有报道。但也存在一些变异类型。如Chay和Thurling1989年报道发现了平均角果长达10 cm以上的变异类型〔1〕。在国内,刘定富等1994年在“中油821”大田中发现角果最长达16 cm的长角果变异株,连续多年的后裔鉴定和单株选择结果表明,这一长角果变异可以稳定遗传,且不受环境影响,是新的长角果变异类型,命名为“鄂油长角”〔2〕。
  油菜长角果性状的遗传方式未见报道。本研究的目的是探讨在中国发现的长角果变异体“鄂油长角”的长角果及与之密切相关性状的遗传方式。

1 材料和方法

1.1 供试材料

  所研究的长角果材料(P1)为“鄂油长角”,短角果材料(P2)为“中油821”。

1.2 遗传

[1] [2] 下一页


  • 上一个医学论文:

  • 下一个医学论文:
  • 相关文章
    Copyright © 2006-2012 绿色健康网(www.gio.org.cn) All Rights Reserved.
    声明:网站信息仅供参考,不能作为诊断及医疗的依据。