摘要
对Ｓ２２、４７８、４８９自交系及其单交、回交、自交后代共１６个基因型的种子发芽和幼苗特性研究表明：①Ｓ２２（深色）、Ｓ２２（中色）、及（Ｓ２２×４８９）自交和回交后代各项指标均较差，且物质运转率低；Ｓ２２（浅色）与４７８相比，发芽率较高，但发芽较慢。②单交种的种子发芽和幼苗特性均随着杂种优势的产生而显著提高，自交、回交后代又随杂种优势的衰退而明显降低。③种子发芽及幼苗特性与粒色有关，受母本胞质基因的影响。④Ｓ２２的种子发芽和出苗特性可以通过后代选择予以改良。
Analysis on the seed germination and seedling characters of 16 different genetypes showed that:(1)All characters for S 22 (dark),S 22 (middle) and the self bred F 2 ,S 3 and backcrosses were poor and they had low transformation percentage of stored substance from embryoes to shoot or root.S 22 (light) had as high germination percentage as 478,but its germination speed was low.(2) The germination and seedling characters for the single crosses made from S 22 with 478 or 489 improved significantly, and those of the progenies decreased with the reduction of heterosis.(3)It seemed that all characters were related with S 22 seed colours and affected by female's cytogenes.(4) The seed germination and seedling characters of S 22 could be improved by special selection from single cross progenies.
出处
《华北农学报》
CSCD
北大核心
1998年第3期52-57,共6页
Acta Agriculturae Boreali-Sinica
关键词
玉米
自交系
种子发芽率
幼苗特性
基因型
Maize inbred
Seed germination percentage
Seedling characters
