Showing papers on "Mutation breeding published in 1989"
TL;DR: Five mutants were selected which combined fast germination and good agronomic performance, and two of these mutants yielded significantly more than did Troubadour over eight environments, and showed a clear improvement in their malting quality through an increase in extract yield.
Abstract: Mutation breeding has been used to improve the speed of germination in the high-yielding spring barley variety Troubadour. Five mutants were selected which combined fast germination and good agronomic performance. Two of these mutants yielded significantly more than did Troubadour over eight environments, and showed a clear improvement in their malting quality through an increase in extract yield. The improvement in malting quality appeared to be due to a decrease in the β-glucan content, which seemed to enhance the germination speed and thus the starch degradation. The improvement in grain yield is postulated to be due to a better early growth caused by the enhanced germination speed. All the described changes could theoretically be explained by a single mutation event in each of the mutant genotypes, affecting the quantity of β-glucans present in the endosperm.
28 citations
TL;DR: The aim of the present paper is to fit the procedures for the selection of mutants from cell cultures into the pattern of traditional mutation breeding and to analyse the conditions under which the use of in vitro cultures may contribute to speeding up the Selection of mutants and thus the success of breeding.
Abstract: The aim of the present paper, therefore, is to fit the procedures for the selection of mutants from cell cultures into the pattern of traditional mutation breeding and to analyse the conditions under which the use of in vitro cultures may contribute to speeding up the selection of mutants and thus the success of breeding
15 citations
TL;DR: A productive yellow flowered mutant with high tropane alkaloid content was isolated in the M2 generation of gamma irradiated progenies of Hyoscyamus niger and redesignated as var.Aela, and released for commercial cultivation in India, thus signifying the efficiency of radiation breeding for crop improvement.
Abstract: A productive yellow flowered mutant with high tropane alkaloid content was isolated in the M2 generation of gamma irradiated (Co60 at 40 kr) progenies ofHyoscyamus niger. Mutant progenies, on an average, were capable of synthetising more than twice crude alkaloid (0.147% to 0.221%) in M3 through M6 generations compared to the parental control (0.065 to 0.106%). In pilot scale trial (M7), two elite lines, Y-15 and Y-17 were found to contain 0.390% and 0.318% crude drug in contrast to 0.211% in an improved inbred used as control. However, owing to conducive plant morphology, Y-17 registered high yield of dry biomass, hence gave more than double yield of crude drug than the improved control (inbred) (23 kg/ha against 11 kg/ha). Also being superior in hyoscyamine and hyoscine yields, it was redesignated as var.Aela, and released for commercial cultivation in India, thus signifying the efficiency of radiation breeding for crop improvement.
12 citations
ENEA1
TL;DR: A methodology of in vitro mutation breeding of potato, consisting of the irradiation and micropropagation of micronodes, has been set up and has yielded a high number of solid mutants.
Abstract: A methodology of in vitro mutation breeding of potato, consisting of the irradiation and micropropagation of micronodes, has been set up. It has yielded a high number of solid mutants, The efficiency of this technique can be further enhanced by screening directly in vitro for useful mutants.
1 citations