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由浙江省农科院用76—27A与2674配组选育而成的粳型杂交稻七优6号,于1990年3月通过省品种审定委员会审定。1990年在浙江余杭县试种184亩,平均亩产为445.3公斤,比当地常规粳稻平均增产27公斤,增幅6.45%。该县乾元乡禾丰村试种11亩,平均亩产达480.5公斤,其中有1.8亩,亩产501.4公斤。该组合表现耐肥抗倒、生长势旺盛、抗性较好、米质和产量均超过杂交税稻,深受农户欢迎。 一、特征特性:该组合属晚粳类型,感光性较强。株型大而紧凑,剑叶较挺,根系发达,耐肥抗倒,分染中等。株高85厘米左右,每穗总粒数115粒,实粒98.5粒,结实率为85.6%,千粒重25.2克以上,一般每亩有效穗22万左右,是一个穗、粒、重兼顾型rrrrrrrrn组合,且适应性广,米质优良。全生育期在141～148天之间,比秀水11长3～6天。 二、M种技术要点:76—27A属晚粳型感光不育系,其柱头外露率在30%以上,且开颖角度大,异交结实率高;父本2674分率力强,花粉量大,制种易获高产,一般亩产175公斤左右,高的可达250公斤以上。其制种技术主要掌握:(1)播差:一般时差20天左右,父本在4月23日和4月28日分两期播种,母本5月13日播种较为适宜。(2)合理安植:母本以16.7 X 13.3厘米种植,父本株距16.7厘米,每亩输母本1.8～2.0万丛,父本0.的万丛。(S)喷九二o因父本植株高于母本,?
Zhejiang Provincial Academy of Agricultural Sciences with 76-27A and 2674 with a group of breeding of the japonica hybrid rice Qiyou 6, in 1990 March through the provincial species validation committee validation. In 1990, Yuhang County, Zhejiang trial 184 acres, the average yield of 445.3 kilograms, than the average local conventional rice production 27 kilograms, an increase of 6.45%. Hefeng Village, Qianyuan Township, has 11 mu of cultivated land, with an average yield of 480.5 kg per mu, of which 1.8 mu and 501.4 kg per mu. The combination of resistance to fattening, vigorous growth, better resistance, quality and yield of hybrid rice than tax, welcomed by farmers. First, the characteristics and characteristics: This combination is a late japonica type, strong photosensitivity. Large and compact plant type, relatively strong flag leaf, developed root system, resistant to lodging, medium distribution. Plant height of about 85 cm, the total number of grains per panicle 115, the actual number of 98.5 grains, seed setting rate of 85.6%, more than 25.2 grams of grain weight, the general effective per acre 220,000 or so, is a spike, grain, weight and r r r r r r r r n combination, and wide adaptability, good quality rice. The whole growth period of 141 to 148 days, 11 days longer than Xiushui 3 to 6 days. Second, the M kinds of technical points: 76-27A is a late japonica type of CMS, the stigma exposed rate of 30% or more, and the open point of view, outcrossing high seed rate; male parent 2674 points strong rate of pollen Large, easy access to high-yielding, generally about 175 kg per mu, up to 250 kg high. The seed production technology is mainly mastered: (1) sowing: the general time difference of 20 days, on April 23 and April 28, the male parent sowing, female parent May 13 planting is more appropriate. (2) Reasonable planting: The female parent is planted with 16.7 X 13.3 cm, the parent plant spacing is 16.7 cm, and the female parent is 1.8 to 20 000 plexs per hectare. (S) spray nine two o because of the parent plant higher than the mother,?