Heterosis and Combining Ability for Major Yield Traits of a New Wheat Germplasm Shannong 0095 Derived from Thinopyrum intermedium

查看全文 作　　者：BAO Yin-[1,2]guang;WANG [3]Sen;WANG Xiu-[1,2]qin;WANG Yu-[1,2,5]hai;LI Xing-[1,2]feng;WANG [1,2,4]Lin;WANG Hong-[1,2]gang

机构地区：[1]Agronomy College, Shandong Agricultural University/Tai'an Subcentre of National Wheat Improvement Centre, Tai'an 271018, P.R. China;[2]State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an 271018, P.R.China;[3]Agronomy College, Nanjing Agricultural University, Nanjing 210095, P.R. China;[4]Jining Institute of Agricultural Sciences, Jining 272031, P.R.China;[5]Zaozhuang University, Zaozhuang 277100, P.R.China

出　　处：《Agricultural Sciences in China》索引2009年第8卷第6期,共8页

基　　金：supported by the National Natural Science Foundation of China (30571156) 摘　　要：The wheatgrass, Thinopyrum intermedium (Host) Barkworth & DR Dewey, shows many beneficial characteristics, such as big spikes and high resistance to many diseases. To transfer the beneficial genes of this species, many wheat-Thinopyrum intermedium alien chromosome lines were developed. Of them, Shannong 0095 (SN0095), a disomic substitution, has long spikes and flag-leaves, and thus may be an important genetic resource for wheat yield improvement. In order to realize its heterosis and combining ability on major yield traits, a 7 × 7 complete diallel design was made according to Griffing's Method-I. The results showed that heterosis for spike length (SPL), flag-leaf area (FLA), number of spikes per plant (NSP), number of spikelets per spike (NSL), kernels per spike (KPS), 1 000-kernel weight (TKW) and grain yield per plant (GYP) existed in all the crosses by SN0095, but heterobeltiosis occurred only for KPS, TKW, and GYP. The relative mid-parent heterosis (RMH) and relative high-parent heterosis (RHH) for GYP, which valued as high as 35.32 and 29.92% respectively, were the highest among all the traits mearsured. Though additive and non-additive gene effects and cytoplasmic effects (or cytoplasmic-nuclear interaction effects) were found in governing all the traits measured above, additive gene action played a predominant role. The results also showed that SN0095 was the best-general combiner for SPL and FLA, and high-general combiner for NSP amongst all the parents. Estimates of specific combining ability (SCA) showed that SN0095 could also make high-SCA combinations for GYP, such as SN0095 × Jimai 19 (JM19). SN0095 could be a unique and important parent in hybrid wheat breeding programs. 关键词：中间偃麦草特殊配合力杂种优势产量性状小麦产量新种质加性基因效应细胞质效应

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Heterosis and Combining Ability for Major Yield Traits of a New Wheat Germplasm Shannong 0095 Derived from Thinopyrum intermedium

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