Author(s):

Ishfaq Abidi, G Ali, ZA Dar, Shabir H Wani, SA Dar and Asima Gazal

Abstract: In the present study male sterility genes and their/fertility restorers were identified in different populations of maize and inheritance of (FR) fertility restoration gene (s) in an indigenously identified cytosterile source in maize (Zea mays L.) investigated to determine the nature and magnitude of gene effects on various quantitative and qualitative traits governing maize cultivation and productivity under tempertate hills of Himalayan Kashmir. For inheritance studies of fertility restoration both visual scoring/scoring with Becket’s Scale-1 was undertaken to establish inheritance of fertility-restoration genes. The dominance nature of fertility restoration gene(s) in F₁ was observed in attempted crosses whereas gene(s) for sterility exhibited recessive nature. The scoring results substantiated staining results for ascertaining inheritance of pollen fertility. Fertility restoration was observed to be governed by dominant genes (monogenic) in nature. Cytogenetic and genetic analysis was carried out after attempting a cross viz. 15C (A) x I-318(R) using three line ABR- system of hybrid development utilizing all six generations viz., P₁, P₂ and F₁ having 30 plants each and F₂ (300 plants), BC₁ (180 plants) and BC₂ (180 plants) in the cross, suggesting possibility of production of successful commercial hybrids in Zea mays L. by using this indigenous CMS/FR line system as parental source

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