Backcross reciprocal monosomic analysis of leaf relative water content, stomatal resistance, and carbon isotope discrimination in wheat under pre-anthesis water-stress conditions

Shahram Mohammady-D Keith Moore John Ollerenshaw and Behrooz Shiran

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Backcross reciprocal monosomic analysis of leaf relative water content, stomatal resistance, and carbon isotope discrimination in wheat under pre-anthesis water-stress conditions

机译：花前水分胁迫条件下小麦叶片相对含水量，气孔抗性和碳同位素判别的回交倒数分析

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Monosomic plants from an Australian variety (Oxley) having low stomatal resistance (SR), low leafnrelative water content (LRWC), and high carbon isotope discrimination (u0001) were crossed with variety Falchettonhaving opposite characters in order to produce F2 backcross reciprocal monosomic families. The families werenassessed under pre-anthesis water-stress conditions in a controlled growth chamber. F2 backcross reciprocalnmonosomic analysis suggested possible allelic variations between chromosomes 1A, 3A, 6A, 7A, 7B, 1D, and 4D ofnFalchetto and their homologues in Oxley for LRWC. This analysis also suggested possible allelic variation betweennchromosomes 5A, 1A, and 3A of Falchetto and their homologues in Oxley for SR. Extending the analysis to thenF3 disomic generation and the assessment of LRWC at this generation confirmed that reciprocals for chromosomesn3A and 6A showed significant differences. F2 backcross reciprocal monosomic analysis for u0001 suggested allelicnvariations on chromosomes 1D, 4D, and 5D. However, chromosome 1D from Falchetto had the highest differencenfrom its homologue in Oxley. Assessing the reciprocals of this chromosome for vegetative evapotranspirationnefficiency (ETEveg) at the F3 disomic generation indicated that the observed variation for u0001 was translated intondifferences for ETEveg. These results indicate that chromosome 1D of Falchetto is promising in reducing u0001 andnthat the improvement of wheat varieties for ETEveg can be done by selection for u0001. Finally, plieotropic effects ofnsome chromosomes were observed for the characters under study. This suggests the existence of genetic factorsnon these chromosomes affecting more than one character. However, some pleiotropic effects could also be due tonnon-genetic developmental interactions.

机译：将具有低气孔抗性（SR），低叶片相对含水量（LRWC）和高碳同位素歧视（u0001）的澳大利亚变种（Oxley）的单种植物与具有相反特征的Falchetton变种杂交，以产生F2回交互反的单亲家族。在开花前的水分胁迫条件下，在可控制的生长室内对这些家庭进行了扫描。 F2回交倒数单基因组分析表明nFalchetto的1A，3A，6A，7A，7B，1D和4D染色体及其在LRWC的Oxley同源物中可能存在等位基因变异。该分析还表明，Falchetto的nA染色体5A，1A和3A及其在Oxley SR的同源物中可能存在等位基因变异。将分析扩展到当时的F3二体组，并在这一代进行LRWC的评估，证实n3A和6A染色体的倒数显示出显着差异。 u0001的F2回交倒数单体分析表明1D，4D和5D染色体上的等位变异。然而，来自Falchetto的1D染色体与其在Oxley同源物的差异最大。评估该染色体在F3二体组发生时的植物蒸散效率（ETEveg）的倒数，表明对u0001观察到的变异转化为ETEveg的差异。这些结果表明，Falchetto的1D染色体有望降低u0001，并且通过选择u0001可以改良小麦品种的TEEveg。最后，观察了一些染色体的多向性效应。这表明存在遗传因素，这些染色体不影响一个以上的性状。但是，一些多效效应也可能是由于tonnon-genetic发育相互作用所致。

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《Crop and Pasture Science》 |2005年第10期|p.1069-1077|共9页
作者
Shahram Mohammady-D Keith Moore John Ollerenshaw and Behrooz Shiran;
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A Faculty of Agriculture, University of Shahrekord, Iran. B School of Biology, University of Newcastle upon Tyne, NE1 7RU, UK. C Corresponding author. Email: shfaza@hotmail.com;

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正文语种 eng
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disomic, plieotropic effect, within-family variation.;

机译：二体组;多相效应;家庭内部变异。;

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Backcross reciprocal monosomic analysis of leaf relative water content, stomatal resistance, and carbon isotope discrimination in wheat under pre-anthesis water-stress conditions

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