| 摘要: |
| 四川盆地小麦的粒重优势明显，但其稳定性受生育后期不利环境的影响较大，研究籽粒灌浆参数的稳定性对于提高粒重和产量的稳定性十分重要。以10个粒重、熟期和株叶型差异明显的小麦品种为材料，设置5个试验环境（年份×地点），研究小麦籽粒灌浆参数的基因型差异及其稳定性。结果表明，参试品种的千粒重差异很大，环境均值变动在42.9~53.0 g之间。多数灌浆参数均存在显著的基因型差异和环境效应，且年份效应大于地点效应。相同年份，粒重（TKW）、最大灌浆速率（Rmax）、平均灌浆速率（Rmean）、渐增期（T1）、缓增期（T3）及快增期灌浆速率（R2）主要受基因型的影响。CM104、CM42、CY23和NM836等品种的所有灌浆参数的稳定性都较好。相关分析表明，TKW与灌浆速率之间存在显著的正相关，而TKW的稳定性则主要与籽粒生长起始势（C0）、渐增期灌浆速率（R1）的稳定性关系密切，C0和R1的稳定性是决定粒重稳定的主要因素。 |
| 关键词: 小麦 灌浆参数 基因型差异 稳定性 |
| DOI：10.11841/j.issn.1007-4333.2014.01.02 |
| 投稿时间：2013-07-05 |
| 基金项目:国家小麦产业技术体系建设资金（CARS-3-1-23） |
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| Analysis of the genotypic variation and stability of grain filling parameters of wheat |
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TANG Yong-lu1, WU Xiao-li1, WU Yuan-qi2, LI Chao-su1, WU Chun1, GUO Da-ming3
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| (1.Crop Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China;2.Maize Research Institute, Sichuan Agricultural University, Wenjiang 611130, China;3.Jiangyou Bureau of Agricultural Technology, Jiangyou 621700, China) |
| Abstract: |
| Grain weight of wheat is influenced by terminal abiotic stresses such as drought or elevated temperature in the Sichuan Basin of China.To explore the difference in grain weight and grain filling parameters amongst genotypes and their stabilities,field experiments were carried out in 5 rain-fed environments (year×site) involving ten spring cultivars.A large variability in thousand kernel weight (TKW) among genotypes was recorded (42.9 to 53.0 g) over experimental environments.Most grain filling parameters were significantly affected by location,year and genotype with environmental effects being larger than genotypic effects.In any one year,TKW,maximum grain-filling rate (Rmax),mean grain-filling rate (Rmean),pyramid period (T1),slow increase period (T3),and grain-filling rate of the fast increase period (R2) were highly dependent on genotype.All grain filling parameters and grain weight of genotype CM104,CM42,CY23 and NM836 were stable based on multi-statistical parameters.TKW correlated positively with grain filling rates including Rmean,Rmax,R1,R2 and R3 whereas the stability of TKW coincided with the stability of initial grain-filling potential (C0) and R1.Therefore C0 and R1 were the main factors affecting the stability of grain weight.CM104 and CM42 are useful germplasm for improving yield and stability of grain weight. |
| Key words: wheat grain-filling parameters genotypical difference stability |
