文献类型： 外文期刊

作者： Irfaq, M. ¹ ; Ajab, Mir ² ; Ma Hongxiang ³ ; Khattak, G. S. S. ¹ ;

作者机构： 1.Nucl Inst Food & Agr, Crop Breeding Div, Peshawar, Pakistan

2.Quaid I Azam Univ, Dept Biol Sci, Fac Plant Sci, Islamabad, Pakistan

3.Jiangsu Acad Agr Sci, Inst Biotechnol, Nanjing, Jiangsu, Peoples R China

期刊名称：CYTOLOGY AND GENETICS （ 影响因子：0.579； 五年影响因子：0.576 ）

ISSN： 0095-4527

年卷期： 2009 年 43 卷 4 期

页码：

收录情况： SCI

摘要： Genetic effects on controlling stripe rust resistance were determined in two wheat crosses, Bakhiawar-92 x Frontana (cross 1) and Inqilab-91 x Fakhre Sarhad (cross 2) using Area under Disease Progress Curve (AUDPC) as a measure of stripe rust resistance. The resistant and susceptible genotypes for crosses were identified by initial assessment of 45 wheat accessions for stripe rust resistance. Mixed inheritance model was applied to the data analysis of six basic populations P (1), F (1), P (2), B (1), B (2), and F (2) in the crosses. The results indicated that AUDPC in cross 1 was controlled by two major genes with additive-dominance epistatic effect plus polygenes with additive-dominance epistatic effects (model E). Whereas in case of cross 2, it was under the control of two major genes with additive-dominance epistatic effect plus additive-dominant polygenes (model E-1). Additive effect was predominant then all other types of genetic effects suggesting the delay in selection for resistance till maximum positive genes are accumulated in the individuals of subsequent generations. Occurrence of transgressive segregants for susceptibility and resistance indicated the presence of resistance as well as some negative genes for resistance in the parents. The major gene heritability was higher than the polygene heritability in B (1), B (2) and F (2) for the crosses. The major gene as well as the polygene heritability was ranging from 48.99 to 87.12% and 2.26 and 36.80% for the two crosses respectively. The highest phenotypic variations in AUDPC (2504.10 to 5833.14) for segregating progenies (BC (1), BC (2) and F (2)) represent that the character was highly influenced by the environment.