Performance and selection for yield of wheat mutants derived from different cultivars

Abstract

Phenotypically stable wheat mutants derived from the gamma rays, ethyl methane sulphonate and combined mutagenic treatments of one locally bred cultivar (C-591) and two cultivars (Indus-66 and Nayab) of Mexican origin, were tested for yield performance in MS generation. Mutants originating from Nayab could be classified into two main categories relative to the control viz. significantly higher yielding and significantly lower yielding. Mutants of C-591 and Indus-66 gave only significantly reduced mean yields compared with their respective controls. Considerable increases in genotypic variance, heritability and genetic gain expected from selection, were observed among the mutants of the three cultivars. The importance of induced mutations for increasing genetic variability connected with useful agronomic traits is emphasised.

Induced Mutations in Plant Breeding

“…High yielding mutants are available in Czechoslovakia (Jech 1966b), Russia (Khvostova 1967;Mar'yushkin et al 1977;Sichkar et al 1980), Pakistan (Siddiqui and Arain 1974), India (Sawhney and Sharma 1979). One of the Pakistani wheat mutants has been approved for release because of its favorable yielding properties and its shattering ::::: .…”

Improvement of seed yield in Vicia faba L. By using experimental mutagenesis. II. Comparison of gamma-radiation and ethyl-methane-sulphonate (EMS) in production of morphological mutants

“…The genetic variation induced by mutagenesis is generally high in connection with the yield of a crop (SIDDIQUI & GHAFOOR, 1974;MICKE, 1976) and especially useful when conventional crosses between distant genotypes are difficult (BROERTJES, 1975). In addition, the induced variation is subject to efficient selection since the genetic basis of the majority of the mutants are simple.…”