结果在SP1代发现植株矮化、穗粒重显著增加等少数性状变异。
Result Variations of characters such as dwarfing of stalk, significant increase grain weight per spike etc were observed in SP1 generation.
穗部性状、农艺性状和品质性状除粒色和株高外，选育品种变异性呈下降的趋势，而病害性状多表现出明显的增加。
Except grain color and plant height, the diversity in spike, agronomic and quality characters of bred varieties has the trends to decrease, but to increase in diseases.
本文还讨论了四川小麦幼穗分化过程中引致穗粒数变异的时期，以及安全孕穗、抽穗期。
The stage controlling seed number per ear during ear differentiation, safe booting date and safe heading date of wheat in Sichuan were discussed.
对6个中熟玉米品种在我国西南地区不同纬度和海拔高度的灌浆期、千粒重、株高和穗位高的变异与纬度和海拔的关系进行了分析。
The variations of grain filling period, 1000 kernel weight, plant height and ear height with latitude and altitude were studied using 6 medium maturing maize varieties grown in Southwest China.
变异系数较小，即改良潜力小的性状为株高、穗长、主穗小穗数、有效小穗数。
The traits with low CV value are plant height, ear length, number of spikelets, available spikelets which had low improvement potential.
性状变异系数最大是单株分蘖数，其后依次为单株粒重和主穗粒重，最小的为株高；
The variation coefficient of the tillering number per plant was the maximal, while grain weight per plant and the main spike grain weight was the next.
由不同的杂交方式所得到的第三代植株，其株高、穗位高、叶长、雌雄间隔期、穗上叶片数等性状表现不一致，存在较大的遗传变异。
Results showed different hybrid method had different effects for the plants, the variation degree were different to the same agronomic characters.
变异涉及株高、抽穗期、穗粒重、出谷率、育性、抗病性、米色等多个性状；
The changed traits included plant height, heading date, grain weight per spike, percentage of grain weight per spike, male sterility, resistance to rust, color of hulled grain.
结果表明，三交种株高、叶绿素含量、穗长等性状与单交种的变异系数差异不显著，但群体抽穗历期延长；
The variation coefficient of TCH was similar to CKs in plant height, chlorophyll content, panicle length, and so on. The heading duration of TCH population was longer than those of CKs.
穗粒数与评价值呈同步变异趋势，与稳定时间成反向变异；
Seed number per plant was same variation tread with valorimeter value, while it was reverse variation tread with stable time.
IPT基因对产量构成因素的效应变异幅度最大的是穗实粒数，然后依次是单株穗数、结实率和千粒重。
Of the yield components, filled grains numbers per panicle showed the most variant extent of effect by IPT gene, followed by panicles per plant, seed set ratio and 1000-grain weight.
IPT基因对产量构成因素的效应变异幅度最大的是穗实粒数，然后依次是单株穗数、结实率和千粒重。
Of the yield components, filled grains numbers per panicle showed the most variant extent of effect by IPT gene, followed by panicles per plant, seed set ratio and 1000-grain weight.
应用推荐