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.: Home > Advances in Crop Science and Technology > 2014 > Volume 2 Number 3 > Mohar Singh * , Narinder K Gautam, Krishna Kumar and Sandeep Kumar

A New Method of Phenotyping and Utilization of Wild Lens Taxa for Diversification of Primary Genepool

Mohar Singh * , Narinder K Gautam, Krishna Kumar and Sandeep Kumar
National Bureau of Plant Genetic Resources, Pusa, New Delhi-110 012, India
Abstract :

The genus Lens is a member of the Vicieae tribe and comprised four self-pollinating  diploid  (2n=2x=14)  species. Lens culinaris  subsp. culinaris Medikus, encompassing two cultivated lentil on the basis of agro-morphological traits, the small seeded (microsperma) and large- seeded  ( macrosperma)  and  L.  culinaris  subsp.  orientalis  (Boiss.) Ponert,  its  presumed  wild  progenitor. The other  sub-species  and species are L.  culinaris subsp. tomentosus (Ladz.), L. culinaris
 subsp. odomensis  Ladz.,  L. ervoides  (Brign.)  Grande,  L. nigricans  (Bieb.) Godr. and L. lamottei Czefr. [1]. Lentil is an important pulse crop ofIndian sub-continent, the Middle-East, Southern Europe and Easternand  Northern  Africa.  A  critical  appraisal  of  lentil  cultivation  and breeding  in  the  past  has  relied  primarily  on  local  landraces  of  L. culinaris  ssp. culinaris.  Of  late,  modern  lentil  cultivars  are  derived from only a small number of improved landraces through pure line selection  following  hybridization  between  genotypes  adapted  tospecific environmental conditions and seed size. These cultigens have some superiority over traditional varieties in terms of yield potential
and disease resistance. Like other pulses, substantial improvement in the yield potential of lentil has not been achieved due to the lack of combination  of  genes  for  higher  productivity,  biotic  and  abiotic resistance, which are scattered in the cultivated and its wild relatives. Exploitation  of  wild  gene  pool  for  breeding  purposes  is  a  common practice in an increasing number of cultivated plants. In many cases, the wild relatives still possess important variation that no longer exists in their cultivated counterparts. Therefore, synthesis of new gene pool following  hybridization  and  introgression  from  cultivated  and  wild types would make it possible to recreate some of the lost diversity in respect of productivity and other desirable characters. In this direction, a total of 463 global wild annual Lens taxa were introduced from the Biodiversity  and  Integrated  Gene  Management  (BIGM)  Unit  at  the International  Centre  for  Agricultural  Research  in  Dry  Areas (ICARDA),  Aleppo,  Syria  during  2010-11.  These were  further multiplied  in  adequate  quantity,  characterized  and  evaluated  under different  agro-ecological  conditions  for  various  qualitative  and quantitative traits. We found that certain accessions of L. ervoides and L. nigricans does not flower properly during normal winter season and these accessions were planted again in summer himalayan nursery at Sangla in Himachal Pradesh during long days. The study revealed that remarkable variability with respect to genetic and non-genetic factors exists  within  the  species  and  would  be  useful  to  the  geneticists  and breeders to plan phenotyping of wild Lens genepool.

Keywords :
Wild Lens Taxa for Diversification of Primary Genepool

Date Deposited : 05 Apr 2016 15:57

Last Modified : 05 Apr 2016 15:57

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Volume 2, Number 3, August 2014 , ISSN ISSN: 2329-8863

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