Physiological mechanism of nitrate genotypic differences in pak - choi 小白菜硝酸盐含量基因型差异的生理机制研究
Genotypic difference in membrane permeability in rice at different zn2 activities 锌离子活度对水稻膜透性的影响及基因型差异
Investigation of genotypic difference of cadmium contents in shoots of brassica campestris ssp . chinensis 白菜镉积累基因型差异研究
Genotypic difference in zn - uptake and translocation at rice seedlings under different zn2 activity 锌离子活度对水稻幼苗锌吸收分配的影响及基因型差异
Callus induction and plant regeneration capacity of different varieties were significantly different 2不同品种在诱导愈伤和分化再生上都有显著的基因型差异。
However , little research has been done in study on the genotypic difference of pteris vittata in as - accumulating ability 然而,有关蜈蚣草富集砷能力的基因型差异尚未有过系统研究。
Genomic analysis indicated that prrsv has two major genotypes , the european represented by strain lv and the north american represented by strain vr - 2332 根据基因型差异, prrsv可分为北美洲型( vr - 2332为代表株)和欧洲型( lv为代表株) 。
The study on the characteristics of development and seed setting of different spikelet and floret positions was important for the realization of big - spike - cultural - goal with more spikelets and grains . with both the winter type ( wv ) and spring type ( sv ) varieties sown at different dates , it was found that the greater seed setting capacity of spikelets resulted in more grain number of spike . the trend of differences in grain weight per spikelet between the different sowing dates and varieties was similar to that of grain number . the correlation between the average grain weight of middle spikelets and lower spikelets and the grain weight per spike was highly significant . the environmental changes resulted from different sowing dates mainly effected the middle spikelets development , even though the differences between wv and sv were represented in every spikelet positions . the grain weight on the second floret position was most sensitive to the development status of wheat plant and environmental changes , and could represent the yielid potential of the whole spikelet . the results showed that the enhancement of seed setting of the middle spikelets ( from 5th to 15th ) and the grain development from the first to third floret positions was a key to realize big - spike and grain 确定小麦不同小穗位和小花位发育与结实特性是实现大穗多粒的重要前提.本文通过对冬、春性小麦品种分期播种试验得出,较高的小穗结实力是增加穗粒数的重要因素.不同播期、品种之间,小穗粒重和粒数呈现相同的变化趋势.中部以及基部小穗粒重与穗粒重之间呈高度正相关.体现环境差异的播期效应以对中部小穗发育的影响为主,而冬、春性品种的基因型差异可反映在各个小穗位上.第2小花位的子粒发育状况反映整个小穗的生产能力.结果表明,促进中部优势小穗(第5 15小穗)结实和第1 3小花位子粒发育是提高小花结实率和穗粒重的关键