An induced brachytic mutant of chickpea and its possible use in ideotype breeding

Abstract

Mutations were induced in chickpea (Cicer arietinum L.) cultivar 'JG 315' through treatment of seeds with ethyl methane sulphonate (EMS). One of the mutants, named JGM 1, had brachytic growth (compact growth), characterized by erect growth habit, thick and sturdy stem, short internodal and interleaflet distances and few tertiary and later order branches. It was isolated from M 2 derived from seeds treated with 0.6% EMS for 6 h. Segregation analyses in F 2 progenies of its crosses with normal chickpea genotypes (JG 315, ICC 4929, and ICC 10301) suggested that a single recessive gene controlled brachytic growth in JGM 1. This gene was not allelic to the br gene for brachytic growth in spontaneous brachytic mutant E100YM. Thus, the gene for brachytic growth in JGM 1 was designated br2 and the br gene of E100YM was redesignated br1. Efforts are being made to use JGM 1 in development of a plant type with short internodes and erect growth habit. Such plant type may resist excessive vegetative growth in high input (irrigation and fertility) conditions and accommodate more plants per unit area.

RETRACTED ARTICLE: Dwarf mutations in grass pea (Lathyrus sativus L.): origin, morphology, inheritance and linkage studies

“…In comparison to control plants, plant height was reduced to different magnitude in three dwarf mutants and the shortest height was recorded in dwf1, followed by dwf3 and dwf2. This reduction in plant height was mainly due to short internodal distances manifested in three dwarf mutants, as also seen earlier in barley dwarf mutant (Sethi 1974), grass pea internode mutant (Talukdar and Biswas 2006) and chickpea mutant (Lather 2000;Gaur et al 2008). Usual prostrate, spreading and indeterminate stem of control plants in the present material were found to be modified to erect habit accompanied with determinate stem in all the three dwarf-mutant lines (figures 1,a-c and 2, a&b).…”

Chickpea

“…Over a dozen mutants have been directly released as varieties , while many others have been used as parents in crossing programmes. Mutants with novel traits, such as cymose infl orescence with more than three fl owers per node (Gaur and Gour 2002 ), brachytic growth habit (Gaur et al 2008 ) and determinate growth habit (Hegde 2011 ), have been identifi ed in chickpea and have potential for developing new plant types in chickpea. Singh et al ( 2014 ) have also identifi ed several useful agro-morphological traits and important biotic parameters in various wild annual Cicer species and suggested their introgressions for widening the genetic base of cultivated gene pool.…”

Induced Mutagenesis in <i>Cicer arietinum</i>

“…Among the pulses, Chick pea is the second largest grown food legume of the world (Gaur et al, 2008). It ranks third among pulses, fifth among grain legumes and 19 th among grain crops of the world.…”

“…It occupies 30 per cent of area with 38 per cent of annual production in India. Apart from the highest protein content, Chick pea has been considered for having essential elements such as calcium phosphorous, iron and vitamins such as niacin and riboflavin (Morno and Cubero, 1998;Gaur et al, 2008) In order to induced variability and utilize useful mutation for efficient plant breeding, the systematic and comparative study of induced mutagenic effectiveness and efficiency in a variety of crop plants and cultivars is essential. The success of any mutation breeding programmes depends on developing screening techniques to identify the desirable mutations, which occur with a very low frequency, among a large number of other mutations with little breeding value (Solanki and Sharma, 2002).…”