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以籼稻广陆矮4号为母本与粳稻黄金光、笹锦为父本的杂交后代作试验材料,试验结果表明,籼粳杂交后代幼苗的生长大于它的亲本。杂交后代和它的亲本在NH_4~+吸收速率上的差异为:母本(籼)>杂交后代>父本(粳)。杂交后代和母本在NH_4~+吸收速率上的差异小于和父本的差异,可能母本对杂交后代在NH_4~+吸收速率上的影响大于父本。NH_4~+吸收的K_m,杂交后代<父本<母本。I_m是母本>杂交后代>父本,但母本与杂交后代之间的差异较小。杂交后代NH_4~+的吸收具有偏低的K_m,偏高的I_m,有较高的NH_4~+吸收效率。NH_4~+同化效率,杂交后代有杂种优势,比亲本高10%上下。
The hybrid progeny of indica rice Guangluai 4 as female parent and japonica golden light and 笹jin as male parents were used as experimental materials. The results showed that the seedlings of indica-japonica hybrids grew more than their parents. Differences in NH4 + uptake rate between hybrid progeny and its parents were: female parent (indica)> hybrid progeny> male parent (japonica). The difference of NH4 + uptake rate between hybrid progeny and female parent was less than that of male parent, and the effect of maternal parent on the NH4 + uptake rate of hybrid progenies was greater than that of male parent. NH_4 ~ + absorbed K_m, hybrid offspring the hybrid progeny> the male parent, but the difference between the female parent and the cross is smaller. NH_4 ~ + absorption of hybrid progenies had low K_m, high I_m and high NH_4 ~ + absorption efficiency. NH_4 ~ + assimilation efficiency, hybrid offspring have heterosis, 10% higher than the parent up and down.