摘要
以W6154S为母本,Cp—SLO17为父本于1988年杂交配组,在后代中经定向选择,于1991年育成W91607S,1994年通过湖北省科委的技术鉴定。W91607S在武汉自然条件下7月25日至9月10日抽穗为稳定不育期,花粉和小穗自交不育度均在99.5%以上。1000株以上群体遗传性稳定,花粉不育度99.99%,小穗自交不育度99.88%。在育性对温度的敏感期进行日平均温度24℃、光照14h处理,花粉平均不育度97.8%,小穗自交平均不育度99.1%,在武汉自然条件下,9月13日以后抽穗为可育期,但可育度较低,花粉和自交可育度2%~6%。在海南陵水3月初抽穗,自然结实率28%~66%。在武汉播始历期103d(3月25日播)~82d(6月20日播),主茎叶片数16.2~14.0片,属长江流域的中籼型品种。株高94cm左右,穗长26.5cm左右,每穗总粒数140~150粒。开花顺畅,花时集中,柱头外露率30.22%~48.62%。配合力较强。
A hybridization was conducted between W6154S(as maternal plant )and CP-SLO 17(as paternal plant) in 1988,W91607S was developed in 1991 by means of directive se-lection in their offsprings.It get through the technique identification made by Hubei Scientific and Technique Commission. Under natural conditions ,the period from July 25 to September10 is the sterile stable stage of W91607S ,its pollen and spikelet-self sterility being over 99.5%. Its traits were stable in more than 1000 plants population field, the pollen and pikelet sterilities being 99.99%and 99.88%respectively. During its fertile sensitive stage to temperature ,it was treated under 24℃(daily mean temperature)and 14 h light condi-tions , the average pollen and spikelet-self sterilities were 97.8%and 99.1%respectively. Heading after September 13 is the fertile period at Wuhan , but its fertilities were relatively low ,pollen and spikelet-self fertilities ranging from 2%to 6%. Heading in early March in Lingshui county of Hainan,its natural seed sets were 28%~66%. Days from seeding to head-ing at Wuhan ranged from 103(seeding on March 25)to 82(seeding on June 20),leaves on main stem from 16.2 to14.0.It belongs to an ecotype of medium indica,W91607S has about 94 cm of plant height,about 26.5cm of panicle length and 140~ 150 grains per panicle.Flowering unhinders and flowering time is more collective. Stigma emergency ranges from 30.22%to48.62%。 It also has a higher combining ability.
出处
《湖北农业科学》
1995年第4期6-11,共6页
Hubei Agricultural Sciences
基金
国家863计划项目