Estimation of heterosis in root length of wheat under different saline environment

Tahira, W. and Buutta, M. and Salam, A. (2011) Estimation of heterosis in root length of wheat under different saline environment. Cereal Research Communications, 39 (2). pp. 306-314. ISSN 0133-3720

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Abstract

A 6 × 6 diallel cross among three sensitive (18180-II, 18205-I, 18205-I and DN-18) and three tolerant (18194-II, DN-4, and LU-26S) wheat genotypes was analyzed. Thirty-six genotypes were sown in a triplicates completely randomized design in hydroponics culture. Data for root length was recorded in three salinity levels, i.e. control, 10 and 15 dSm⁻¹. Combining ability effects controller tolerance in the two salinity levels (10 and 15 dSm⁻¹). The genotypes 18194-II and LU-26S exhibited highest general combining abilities under10 and 15 dSm⁻¹. The cross combinations with highest specific combining ability for root length were 18194-II × DN-4, 18180-II × 18205-I and LU26S × DN-18 under salinity levels. In reciprocals the crosses DN-18 × DN-4 and DN-4 × 18205-I appeared to be superior to the others under high salinity levels. DN-4 × LU26S produced significantly longer roots than its better parent and thus showed highest heterobeltiosis in high salinity level.

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