• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pakistan journal of botany >Genetics of floral traits in cytoplasmic male sterile (CMS) and restorer lines of hybrid rice (Oryza sativa L.)
【24h】

Genetics of floral traits in cytoplasmic male sterile (CMS) and restorer lines of hybrid rice (Oryza sativa L.)

机译：杂交水稻（Oryza sativa L.）细胞质雄性不育（CMS）和恢复系花艺性状的遗传

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present scientific study was taken up at T amil Nadu Rice Research institute (TRRI), Aduthurai to study the genetic parameters and association among the floral traits of CMS lines and identification of parental lines having potential outcrossing ability for hybrid seed production. Among the five CMS lines and fifty one tester lines studied for eleven floral traits, CMS line COMS 23A registered higher mean value for style length, breadth and panicle exsertion. The genotype COMS 24A had greater stigma breadth, while COMS 25A had long style with good stigma length and breadth. All the CMS lines had above 99.50% pollen sterility. Analysis of variance revealed significant differences among the CMS lines for all floral traits studied. High heritability coupled with high genetic advance as percent of mean was recorded for five traits viz., anther length, stigma length, style breadth, glume opening angle and stigma exsertion rate suggesting the improvement of these characters through simple phenotypic selection. Association analysis of floral traits in the CMS lines revealed that glume opening angle had strong positive and significant association with stigma exsertion rate. Stigma length had positive non – significant association with stigma exsertion rate. No association between anther size and pollen fertility or spikelet fertility in tester line could be established. Out crossing will be higher in seed production of hybrids resulting from any of the four CMS lines viz., COMS 23A, COMS 25A, CRMS 31A and CRMS 32A since each CMS line had some of the desirable floral trait. COMS 23A and COMS 25A had desirable stigma characters, while CRMS 31A and CRMS 32 had desirable glume opening angle which is highly associated with higher out crossing rate.
机译：本科学研究是在Aduthurai的泰米尔纳德邦水稻研究所（TRRI）进行的，以研究CMS系花性状的遗传参数和关联，以及鉴定具有潜在杂交能力的杂交亲本的亲本系。在针对11个花卉性状进行研究的5条CMS系和51条测试器系中，CMS系COMS 23A的花型长度，宽度和穗伸长的平均值较高。基因型COMS 24A具有较大的柱头宽度，而COMS 25A具有长的样式，具有良好的柱头长度和宽度。所有CMS系的花粉不育率均在99.50％以上。方差分析显示，对于所有研究的花卉性状，CMS系之间存在显着差异。花药长度，柱头长度，样式宽度，颖颖开角和柱头外露率等五个性状记录了较高的遗传力和较高的遗传平均率，表明通过简单的表型选择可以改善这些性状。雄性不育系的花性状相关分析表明，颖片的开角与柱头外露率有很强的正相关关系。柱头长度与柱头外露率呈正非显着相关。在测试株系中，花药大小与花粉繁殖力或小穗繁殖力之间没有关联。由于四个CMS系，即COMS 23A，COMS 25A，CRMS 31A和CRMS 32A中的任何一个所产生的杂种，其出交率将更高，因为每个CMS系均具有某些理想的花性状。 COMS 23A和COMS 25A具有理想的柱头特征，而CRMS 31A和CRMS 32具有理想的颖片张开角，这与较高的交叉率密切相关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号