化学杀雄剂对四川小麦杀雄效果研究初报

PRELIMINARY RESULT FOR GAMETOCIDAL EFFECTS OF CHAS ON COMMON WHEAT IN SIGHUAN

应用乙烯利(2-氯乙基磷酸)、KMS-1(3—(对氯苯基)-6-甲氧基—均三嗪—2,4(1H、3H)二酮三乙醇胺盐)、SC_2、4Pu等以不同组配方式对四川主栽品种绵阳11号进行杀雄效果试验和应用乙烯利、KMS-1各3000ppm混合液喷药方式杀雄效果试验。结果表明:(1)乙烯利、KMS-1各3000ppm混合杀雄是本试验中最佳药剂组配方式,比单一药剂喷施药害轻,杀雄后的植株相对不育率达99％以上,相对异交结实率达56.41％;(2)不同品种对药剂敏感性有差异,绵阳11号比80-8敏感;(3)乙烯利、KMS-1低剂量混用,总剂量相同,一次施与分次施杀雄效果无显著差异;(4)喷药后,株高平均降低7.07cm,穗颈缩短,但除单施乙烯利处理的穗子不能全部抽出外,各处理均全部抽出,不影响异交结实,穗长无明显变化。

The effects of gametocides Ethephon, KMS-1, SC2, 4pu, and Zinc Methylarsonate with different dosage and combinations on common wheat,leading varieties in Sichuan, were tested. The results showed that the concentrat'on of 3000 ppm Ethephon+3000 ppm KMS-1, which produced more than 99% male sterility giving 58.41% outcrossing setting percentage, was the best treatment among them, and induced fewer female sterility than single CHA. Various genotypes are not equally response to CHAS, wheat of Mianyang 11 being more sensitive than 80-8.There were no significant differences in gametocidal effect between spraying in once and in twice when the compound of Ethephon and KMS-1 was applied at low dosage. The CHAS averagely inhibit stem elongation by 7.07cm and shorten spike stalk. All spikes, except those of Ethephon treatment, might fully emerged from the leaf sheath and outcrossing setting percentage was not affected. The spike length had not significant variation.