Gene action for physiological parameters and use of relative water content (RWC) for selection of tolerant and high yield genotypes in F2 population of wheat
Gene action for physiological parameters and use of relative water content (RWC) for selection of tolerant and high yield genotypes in F2 population of wheat
复制标题
生理参数的基因作用和利用相对含水量（RWC）选择小麦 F2 群体的耐受和高产基因型
DOI：
--
复制
发表时间：
2013
影响因子：
--
通讯作者：
M. Danaee
中科院分区：
文献类型：
--
作者：
N. M. Reza;M. A. Kadir;M. Rafii;H. Jaafar;M. Danaee
为了筛选出适合于培育抗旱型优质高产面包小麦品种的亲本，以8个亲本为材料，采用半双列杂交方法，研究了部分生理性状的配合力和基因作用。所研究的品种（Irena/Babax//Pastor、S-78-11、Tajan、Chamran、Moghan 3、Hamoon、Veery/Nacozari和Hirmand）对干旱胁迫具有不同的耐受水平。八个亲本基因型，和他们产生的28个F2代，生长在一个三重随机完全区组设计。干旱胁迫和非胁迫条件下，通过灌溉75%和25%的土壤水分消耗。对数据进行方差分析、配合力因子分析和抗旱性指标与因子得分的相关分析（Griffing方法2，模型1）。各性状的一般配合力和特殊配合力效应均达到显著水平，但非加性基因效应大于加性基因效应。根据一般配合力，Chamran品种将高相对含水量（RWC）传递给后代。各性状的广义遗传力较高，狭义遗传力较低，说明非加性基因效应的重要性。因子分析结果表明，叶绿素a和B含量、脯氨酸含量、细胞膜稳定性、相对含水量和产量对3个因子的贡献率达70%左右。根据干旱胁迫指数（STI和GMP），Irena×Chamran是最耐干旱胁迫的基因型。两个干旱胁迫指标与因子分析中影响相对含水量和产量的第三个因子之间的相关系数均为显著正相关。因此，RWC可以作为选育高产耐药基因型的一个很好的标准。
In order to identify parents suitable for use in a breeding program for the development of high quality and high yield varieties of bread wheat with drought tolerant genotypes, the combining ability and gene action for certain physiological traits were investigated in half-diallel crossings among eight parental lines. The cultivars investigated (Irena/Babax//Pastor, S-78-11, Tajan, Chamran, Moghan3, Hamoon, Veery/Nacozari and Hirmand) possess different tolerance levels to drought stress. Eight parental genotypes, and their resulting 28 F2 generations, were grown in a triplicate randomised complete block design. Drought stress and non-stress conditions were achieved through irrigation at 75% and 25% soil moisture depletion. Data were subjected to analysis of variance, combining abilities factor analysis and correlation analysis between drought tolerance indices and factor scores (according to Griffing’s method 2, model 1). General combining ability and specific combining ability effects were significant for traits; however, non-additive gene effects were dominant over additive effects. The cultivar Chamran transmitted high relative water content (RWC) to its progeny, based on general combining ability. Broad-sense heritability was high and strict-sense heritability was low for the traits, confirming the importance of non-additive gene effects. The results of factor analysis revealed that three factors explained approximately 70% of total variation; these factors were strongly influenced by chlorophyll a and b, proline content, cell membrane stability, RWC and plant yield. Based on drought stress indices (STI and GMP), the cross Irena×Chamran was the most tolerant genotype. Correlation coefficients between two drought stress indices and the third factor from the factor analysis, which influenced RWC and plant yield, were positive and significant. Thus, RWC may be a good criterion for selection of tolerant genotypes with higher yields in breeding programmes.
影响因子：
7.4
作者：
ARNON, DI
通讯作者：
ARNON, DI