The results indicated that potassium fertilizer application increased grain yield of wheat significantly by 10 . 2 % to 24 . 8 % due to enhancement of wheat plant height , spike length , 1000 - grain weight and grains per spike 结果表明，施用钾肥能增加小麦株高、穗长、千粒重及穗粒数，因而显著提高小麦产量，小麦增产10 . 2 % ~ 24 . 8 % 。
The positive correlation between 1000 - grain weight and grain numbers per spike , plant height and protein content , heading date and spikelet number per spike , have disadvantageous effect on the genetic improvement of wheat - rye recombinant lines 千粒重和穗粒数的负偏相关对小麦异源(黑麦)重组系的遗传改良有重大影响，打破该相关也相当困难。
The positive significant correlations were found between heading date and spikelet number per spike , plant height and protein content , 1000 - grain weight and grain numbers per spike , grain number per spike and grain weight per spike , respectively 结果表明：抽穗期与小穗数、株高与蛋白质含量、千粒重与穗粒重以及穗粒数与穗粒重均呈极显著的正偏相关。
Primary branch number , secondary branch number , primary branch grain number , secondary branch grain number and secondary branch grain rate are significantly positively correlated with grain number per panicle 一次枝梗数、一次枝梗粒数、二次枝梗数、二次枝梗粒数以及二次枝梗粒率都与每穗粒数呈极显著的正相关关系，这些性状的增加将有助于穗粒数的增加。
Lines of gh01 could be included as susceptible genotype with significant decrease in yield , pod seed , vigor index , relative root length , relative shoot length and weight , while oil content of seed decreased but protein content of cake increased significantly 不耐湿的品种如gh01等活力指数、相对苗长、相对苗重、单株粒重、每角粒数含油量等显著降低，蛋白质含量显著提高。
The results are as follows : grain number per panicle , seed density , secondary branch number , secondary branch grain number , secondary branch grain rate are significantly positively correlated with rice yield , & the yield is affected by all of them 产量与每穗粒数、着粒密度、二次枝梗数、二次枝梗粒数、二次枝梗粒率呈极显著的正相关关系，这些性状对产量都有积极意义，产量是其综合作用的表现。
It was also found that the average number of germinated pollen grains on each stigma of ga mutant was less than that of wild type , while in ga overexpression strains the average number was more than that of control ( wild type and empty vector control ) 体内实验中， gpa1突变体柱头上实际萌发的花粉粒数少于野生型，超表达植株则多于野生型和空载体对照； agb1 - 1突变体柱头上实际萌发的花粉粒数与对照比较差异不显著。
The effects of sowing dates on phenotype value of grain weight per plant , seed setting rate and path coefficients of seed setting rate were more effective than those on partial correlation coefficients between grain weight per plant and panicles per plaht , total spikelets per panicle and seed setting rate 播期对单株产量、结实率及结实率相对重要性影响较大，而对单株产量与单株有效穗、穗粒数及结实率的偏相关影响较小。
Dominant negative alleles of gpil7p were produced by random pcr mutagenesis of three conserved fragments of gpi17p : 1 ) having generated the plasmid library which contains 100000 plasmids harboring gpi17 mutants then screened from 8000 clones , we got 25 strong and 3 very strong dominant negative alleles 对gpi17p可能的三个保守区进行了pcr随机诱变，并最终获得显性负性等位基因： 1 )组建了gpi17p突变体质粒库，其所含质粒数约为100000 。
Research results from field experiments with yedan 14 ( table 2 . ) suggested that density and ears play an decisive roles in yield formation , maize yield increased with density and ears but grains per ear and kernel weight reduced when density varied from 52500 to 75000 plants / ha 掖单14大田试验研究结果（表2 ）指出密度和穗数是产量构成的决定性因素，玉米产量随密度和穗数增加而增加，但穗粒数和粒重当密度由52 , 500增加到75 , 000株/公顷时都降低。
