African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Variability and trait association in culm and grain yield characteristics of recombinant inbred lines of Eragrostis tef × Eragrostis pilosa

Demeke Mewa1, Getachew Belay2 and Endashaw Bekele3*
1Bahir Dar University, P. O. Box 79, Bahir Dar, Ethiopia. 2Common Market for Eastern and Central Africa (COMESA), Zambia. 3 Faculty of Life Science, Addis Ababa University, P. O. Box1176, Addis Ababa, Ethiopia.
Email: [email protected]

  •  Accepted: 07 May 2013
  •  Published: 29 May 2013

Abstract

A study was conducted to assess variability and association in some culm and grain yield characteristics of recombinant inbred lines of a cross between Eragrostis tef and Eragrostis pilosa. A total of 81 lines were evaluated using randomized complete block design at Akaki and Debre Zeit, Ethiopia in 2007. Analysis of variance indicated that there exists difference among the recombinant inbred lines of similar and different parental genotypes. Grain yield revealed high (>30%) genetic coefficient of variation while lodging index revealed moderate (>15%). Moderate (>10%) genetic coefficient of variation was also recorded for plant height, panicle length and culm characters. Genetic advance was high for grain yield (>50%) and lodging index (>20%). Moderate (>10%) genetic advance was recorded for culm related characters. Most associations of the characters considered in the study were positive. Lodging index revealed consistently strong association with second culm strength that would be a point of further investigation. The variability among the recombinant inbred lines considered in this study has verified importance of E. pilosa in diversifying germplasm base for tef crop improvement. Existence of considerably high genotypic variability between recombinant inbred lines of different parental genotypes has also put a promise to further tef crop improvement, through crossing with many more genotypes of E. pilosa. Difference revealed between the sites implicating the need to work on more environments to represent major tef growing conditions.

 

Key words: Tef improvement, variation, lodging, genetic advance.