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Studies on Heterosis among Different Wheat Varieties or Lines in Different Ecological Regions

Author: LiuLongFei
Tutor: SunDongFa
School: Huazhong Agricultural University
Course: Crop Genetics and Breeding
Keywords: Hybrids Heterosis Ecological zones Related
CLC: S512.1
Type: Master's thesis
Year: 2005
Downloads: 71
Quote: 0
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Abstract


Four ecological zones 24 wheat varieties (lines) group with the 48 F 1 hybrids , their full heading flag leaf photosynthetic characteristics traits and some important agronomic traits of 23 traits hybrids advantage , F 1 < / sub > generation of traits in pro average correlation , F 1 on behalf of each trait with high affinity value and yield influencing factors of Multiple Regression Analysis . The results show that : a study of four ecological zones 48 F 1 heterosis is quite common, and the combination of the heterosis size traits and different ecological zones of wheat varieties (lines) vary . Choose the different ecological zones varieties (lines ) hybridization can be bred both high yield and good hybrid integrated traits , the combination of research , Huanghuai wheat area in northern wheat varieties (lines) between the progenies than easy to select the high-yield , lodging resistance and canopy structure , good hybrids , while the middle and lower Yangtze wheat growing areas and the northern wheat varieties (lines) hybrids more difficult to filter out the strong combination of advantages . 3 In addition to the the monoclonal effective tillers, photosynthetic rate, transpiration rate , stomatal conductance , seed weight , biological yield per plant , grains per plant , traits F 1 with both parents average significant or the extremely significant related traits F 1 < / sub > In addition to the 7 traits as well as the main grain harvest index , spike grains , grain stem ratio of 11 traits , the rest of the characters are high-affinity values ??significantly or very significantly correlated . 4 production and influencing factors of multiple regression to eliminate the interaction between the traits a true reflection of the different traits of the extent of the production role . 5 factors of the a 5 flag leaf photosynthetic efficiency in Huanghuai wheat area with wheat growing areas of the Yangtze and middle and lower reaches of the Yangtze River wheat region , Xinan Mai district , Xinan Mai district and the northern wheat growing areas varieties hybrids showed positive parent heterosis ; in Huanghuai wheat area and the Yangtze River Valley wheat area Huanghuai wheat area Xinan Mai , the middle and lower Yangtze wheat region , the Yangtze River wheat growing areas and the northern wheat growing areas , the middle and lower Yangtze wheat area Xinan Mai District , Southwest hybrid varieties of wheat region have shown the advantage of the positive control .

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CLC: > Agricultural Sciences > Crop > Cereal crops > Wheat > Wheat
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