Title of paper

Path Analysis on Association of Lodging Related Traits in Recombinant Inbred Lines of Eragrostis Tef Eragrostis Pilosa

Start Date

16-8-2014 2:00 PM

End Date

16-8-2014 4:00 PM

Submission type

Presentation

Abstract

A study was conducted to assess variation and association of lodging related traits in 76 recombinant inbred lines (RILs) of Eragrostis tef x Eragrostis pilosa and their parents in two environments using RCB design in Ethiopia. The ultimate objective of the study was to generate information helpful to developing erect tef genotypes. ANOVA and correlation analyses indicated that there exists difference among the genotypes and due to environment, and positive association among all traits considered. However, path analysis untangled hidden associations.

Generally strong-positive effect on lodging was exerted by second culm strength directly and indirectly though most other traits. At Akaki first culm strength exerted considerable negative effect on lodging through days to maturity and shoot biomass; effect of all other traits was weak both directly and indirectly.

At Debre Zeit plant height, spikelets per panicle and days to maturity showed strong-negative effect directly and indirectly through most other traits. Strong-positive effect was also revealed by panicle length directly and indirectly at Debre Zeit. Targeting second culm strength directly and indirectly would pave an outlet to developing erect-growing genotypes. However indirect effects through many other traits and the variation die to environment would complicate the target. It would be advisable to complement conventional breeding prospects by introducing dwarf conferring major gene to stably go for erect-growing tef genotypes in different and changing environments which may also play with dry matter partitioning for capitalizing on grain harvest.

Keywords

RIL, trait association

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Aug 16th, 2:00 PM Aug 16th, 4:00 PM

Path Analysis on Association of Lodging Related Traits in Recombinant Inbred Lines of Eragrostis Tef Eragrostis Pilosa

A study was conducted to assess variation and association of lodging related traits in 76 recombinant inbred lines (RILs) of Eragrostis tef x Eragrostis pilosa and their parents in two environments using RCB design in Ethiopia. The ultimate objective of the study was to generate information helpful to developing erect tef genotypes. ANOVA and correlation analyses indicated that there exists difference among the genotypes and due to environment, and positive association among all traits considered. However, path analysis untangled hidden associations.

Generally strong-positive effect on lodging was exerted by second culm strength directly and indirectly though most other traits. At Akaki first culm strength exerted considerable negative effect on lodging through days to maturity and shoot biomass; effect of all other traits was weak both directly and indirectly.

At Debre Zeit plant height, spikelets per panicle and days to maturity showed strong-negative effect directly and indirectly through most other traits. Strong-positive effect was also revealed by panicle length directly and indirectly at Debre Zeit. Targeting second culm strength directly and indirectly would pave an outlet to developing erect-growing genotypes. However indirect effects through many other traits and the variation die to environment would complicate the target. It would be advisable to complement conventional breeding prospects by introducing dwarf conferring major gene to stably go for erect-growing tef genotypes in different and changing environments which may also play with dry matter partitioning for capitalizing on grain harvest.