This study was conducted during 2018 and 2019 at the Rice Research and Training Centre farm, Sakha, Kafr el Sheikh, Egypt. Six genotypes of rice, Sakha 101, Giza 178, Irat 170, Wab-56-104, IR65500-127 and IR69853 were half-diallel crossed to estimate the combining ability effect as well as sink and yield potential in rice. Sink capacity (number of spikelets/panicle and 1000-grain weight), source leaf (flag leaf length, flag leaf width and flag leaf area), source-sink association (number of spikelets/panicle to flag leaf area ratio) and traits of yield components (filled grains number/panicle and panicle number) plant and grain yield/plant) were analysed. The results indicated that both general and specific combining ability were highly significant for all the studied characteristics. IR65500-127, Giza 178, and Sakha 101 were identified as good parents, so these parents were suggested for a further recombinant breeding programme. The cross of 3 × 5 was found to be superior for flag leaf width and grain yield, while the cross of 1 × 4 was found to be superior for flag leaf length, flag leaf length/width ratio, chlorophyll content and number of panicles/plant. Advancing these crosses and effected selections in segregating generation would be helpful to develop high yielding varieties. The genetic parameter showed a dominant deviation in one direction was controlled for all characters except flag leaf length. The analysis of the regression line showed that the over-dominance played an important role in the inheritance of gene action for grain yield/plant.

这项研究于2018年至2019年在埃及Kafr el Sheikh的Sakha的Rice研究和培训中心农场进行。将六个基因型的水稻，Sakha 101，Giza 178，Irat 170，Wab-56-104，IR65500-127和IR69853进行半双杂交，以估算水稻的结合能力效应以及下沉和产量潜力。库容（小穗/穗数和1000粒重），源叶（旗叶长度，旗叶宽度和旗叶面积），源-库关联（小穗/穗数与旗叶面积之比）和性状分析了产量成分（实粒数/穗数和穗数）植物和籽粒产量/植物。结果表明，对于所有研究的特征，一般和特定的结合能力都非常重要。IR65500-127，吉萨178，和Sakha 101被确定为好亲本，因此建议这些亲本进行进一步的重组育种计划。发现3×5的十字对旗叶宽度和籽粒产量均优于，而1×4的十字对旗叶长度，旗叶长度/宽度比，叶绿素含量和穗数/厂。在分离世代中推进这些杂交并进行有效的选择将有助于开发高产品种。遗传参数显示，除剑叶长度外，所有字符都控制一个方向的显性偏差。对回归线的分析表明，过度优势在谷物产量/植物基因作用的遗传中起着重要作用。发现3×5的十字对旗叶宽度和籽粒产量均优于，而1×4的十字对旗叶长度，旗叶长度/宽度比，叶绿素含量和穗数/厂。在分离世代中推进这些杂交并进行有效的选择将有助于开发高产品种。遗传参数显示，除剑叶长度外，所有字符都控制一个方向的显性偏差。对回归线的分析表明，过度优势在谷物产量/植物的基因作用遗传中起重要作用。发现3×5的十字对旗叶宽度和籽粒产量均优于，而1×4的十字对旗叶长度，旗叶长度/宽度比，叶绿素含量和穗数/厂。在分离世代中推进这些杂交并进行有效的选择将有助于开发高产品种。遗传参数显示，除剑叶长度外，所有字符都控制一个方向的显性偏差。对回归线的分析表明，过度优势在谷物产量/植物的基因作用遗传中起重要作用。在分离世代中推进这些杂交并进行有效的选择将有助于开发高产品种。遗传参数显示，除剑叶长度外，所有字符都控制一个方向的显性偏差。对回归线的分析表明，过度优势在谷物产量/植物的基因作用遗传中起重要作用。推进这些杂交并在分离世代中进行有效的选择将有助于开发高产品种。遗传参数显示，除剑叶长度外，所有字符都控制一个方向的显性偏差。对回归线的分析表明，过度优势在谷物产量/植物基因作用的遗传中起着重要作用。