【摘 要】
：
The discovery and application of environment-sensitive genic male sterile (EGMS) rice germplasm provide an easy method for hybrid rice breeding and have made great contributions to hybrid rice production. Typically, the photoperiod- and thermo-sensitive G
【机 构】
：
College of Agronomy,Anhui Agricultural University,Hefei 230036,P.R.China;Rice Genetics and Breeding
论文部分内容阅读
The discovery and application of environment-sensitive genic male sterile (EGMS) rice germplasm provide an easy method for hybrid rice breeding and have made great contributions to hybrid rice production. Typically, the photoperiod- and thermo-sensitive GMS (P/TGMS) lines utilized in two-line hybrid systems are male sterile under long day or/and high temperature but fertile under short day or/and low temperature conditions. However, YannongS (YnS), a reverse TGMS (rTGMS) line, is sterile under low temperature (29.5℃). Here, we report a genetic study on the rTGMS trait in YnS. Interestingly, the F1 plants of the cross between YnS and a cultivar, L422, were male sterile at 22℃ and completely fertile at 27℃. Moreover, the segregation ratio of fertile and sterile individuals in YnS/L422 F2 populations changed from 1:3.05 to 2.95:1 when the ambient temperature increased, showing that the rTGMS trait exhibits semi-dominance in YnS. We further found a locus on chromosome 10, termed RTMS10, which controls the rTGMS trait in YnS. We then finely mapped RTMS10 to a ～68 kb interval between markers ID13116 and ID1318 by YnS/L422 BC6F2 populations. A near iso-genic line (NIL) NL1 from the BC6F3 generation was developed and the pollen of NL1 became abnormal from the meiosis stage under low temperature. In summary, we identified an rTGMS locus, RTMS10, and provided co-segregated markers, which could help to accelerate molecular breeding of rTGMS lines and better understand the rTGMS trait in rice.
其他文献
为更好地给山东省奶业生产提供信息,保持奶业可持续健康发展,掌握当前原料奶生产成本的现状和发展趋势,山东省奶业协会(以下称“省奶协”)对全省规模化牧场原料奶生产成本情况进行了全面调查和重点企业调研.结果显示,今年山东多地玉米青贮收储受强降雨影响,缺口较大,饲草料成本全面上涨,公斤奶全成本节节攀升,生鲜乳价格不能保障,购销合同履约难,经营业主面临严峻挑战,并据此提出相应对策建议.
大学课程建设是高等教育内涵建设的核心,直接决定着高等教育人才培养质量的高低,打造“金课”,已成为当前中国大学课程与教学改革的热点问题.在新农科建设背景下,本文通过对农学动物医学专业《兽医临床诊断学》核心课程目前教学改革的现状、主要面临的问题及如何打造“金课”进行探讨,为一流本科课程建设提供一定的参考.
Castration of male animals is a common practice in the meat industry aimed at reducing aggressive behavior, preventing unpleasant flavor, and controlling undesirable breeding. For many years, mechanical castration and surgical castration have been practic
China has the world\'s largest sheep flock and the largest producer of sheep meat by far. However, the nutrient requirements have not been systemically studied and there is a lack of knowledge of nutrient requirement for meat-type sheep in China. Since
Nitrate reductase (NR) is an important enzyme for nitrate assimilation in plants, and post-translational phosphorylation regulates NR activity. To evaluate the impact of the dephosphorylation of nitrate reductase 1 (NIA1) protein on NR activity, nitrogen
The plant hydraulic network faces several challenges under drought stress. Hydraulic conductivity is one of the major indicators of the hydraulic network\'s response to drought stress. Here, we review our current understanding of the factors directly af
Soybean (Glycine max (L.) Merr.), a typical short-day plant, is sensitive to photoperiod, which limits the geographical range for its cultivation. In the flowering pathway regulated by photoperiod, E1, a flowering inhibitor in soybean, plays the dominant
With the application of hybrid wheat, lodging is becoming one of the major factors limiting high yield in its production. However, few studies have focused on combining ability and heterosis analysis of stem-related traits. In this study, 24 crosses were
The introduction of genetically modified (GM) soybean into farming systems raises great concern that transgenes from GM soybean may flow to endemic wild soybean via pollen. This may increase the weediness of transgenic soybean by increasing the fitness of