ALVES, V. M. C.

BAHIA FILHO, A. F. C.

OLIVEIRA, A. C. de

PITTA, G. V. E.

SCHAFFERT, R. E.

Repository Open Access to Scientific Information from Embrapa

I • • • • • • • • • _ a _ • • • • • • • • • • • • • • a _ • _ _ _ •. ~ -.11PERFORMANCE OF NEAR ISOGENIC SORGHUM LINES AND HYBRIDS FOR •TOLERANCE TO TOXIC LEVELS OF EXCHANGEABLE ALUMINUM. R.E. Schaffert'", •V.M.C. Alves', G.V.E. Pitta', A.F.C. Bahia FoI. C.A. de Oliveira". IEMBRAPNCNPMS, CP 151, •35701-970 Sete Lagoas, MG, Brazil, 2Fellowship CNPq/CNPMS. ••Near isogenic sorghum lines developed at the National Maize and Sorgum Research Center(CNPMS) of the Brazilian Agriculture Research Corporation (EMBRAPA) for tolerance to AItoxicity in acid soils and their hybrids were evaluated for tolerance to AI toxicity. Three nearisogenic pairs of sorghum lines with cytoplasmic mal e sterility, four restorer lines, threesusceptible (S) and one tolerant (T) to AI toxicity, and their respective, (TxT), (TxS), (SxR), and(SxS) hybrids, were evaluated for tolerance to AI toxicity using rei ative seminal root growth(RSRG) of seedlings in nutrient solution with 4ppm of AI for sevem days as the indicator. The •average RSRG of seedlings of the tolerant line of the three near isogenic pairs was 5.8 times 11greater than the susceptible line. The average RSRG values for the four tolerant and six •susceptible lines were 51.7% and 7.8% respectively. Average RSRG values for the (TxT), (TxS), •(SxT), and (SxS) hybrids were 59.7%, 47.8%, 48.3% and 11.2% respectively. The (TxS) and •(SxT) hybrids had RSRG equivalent to the tolerant parent demonstrating a dominant mode of •inheritance. Additivity for the TxT hybrids was very minoro A dominant mode of inheritance for •tolerance to AI toxicity in sorghum has also been observed under field conditions at CNPMS. ••••lie•11I•••11I'i•li•• • • • • • • • • • • IR ., •• ri • • • li! • • 11 11 • &í fi I li IS 16. I I I. ILI ~ . IL - Ii_JLJi __.

Performance of near isogenic sorghum lines and hybrids for tolerance to toxic levels of exchangeable aluminum.

Abstract

Similar works

Full text

Available Versions

Repository Open Access to Scientific Information from Embrapa