The protein contents in 72 diverse accessions of lentil ranged from 10.5 to 23.7 % with an average of 18.7 % in varieties/breeding lines, 14.5 to 27.1 % with an average of 22.4 % in landraces of Mediterranean origin and 18.1 to 32.7 % with an average of 22.6 % in wild species. Significantly high protein content (32.7 %) was recorded in accession ILWL 47 belonging to Lens ervoides. The coefficient of variation and standard deviation in Mediterranean landraces (18.1 %) showed high protein contents as compared to varieties/breeding lines (16.9 %) and wild species (17.8 %). As per the Jaccard's similarity coefficient based on protein content 72 accessions were grouped into two main clusters. Cluster I possessed a solitary accession ILWL 47 while remaining accessions were grouped in cluster II, which was subdivided into sub cluster IIa with 48 genotypes and IIb comprising of 29 accessions of varieties/breeding lines, 16 of wild species and 3 landraces. The results indicated that Indian varieties/breeding lines are significantly different from Mediterranean landraces and wild species in respect of protein contents.
The mineral content of pulses is generally high, but the bioavailability is poor due to the presence of phytate and polyphenols which inhibits Fe absorption. In the present study, the genetic variability and heritability for seed Fe and Zn content was studied. The effect of genotypes was significant for all the quality traits indicating presence of enough variability among the blackgram genotypes for the traits. The Fe content in 26 blackgram genotypes ranged from 71.02 to 100.20 ppm, whereas Zn content ranged from 18.93 to 60.58 ppm. Maximum Fe as well as Zn was recorded in genotype SHEKHAR 2 (100.2 and 60.58 ppm respectively). The Phytic acid and polyphenol content among genotypes varied significantly and it ranged from 0.06-0.37% to 5.88-9.03 mg/g, respectively. High phytic acid content was recorded in black gram genotypes COBG 653, Nodai Urd, NP 03 and PKG U 03, whereas high polyphenol content was recorded in PU 31, IPU 99-200, PDU 1 and YAKUBPUR 2. Blackgram genotype COBG 653 had high phytic acid but low polyphenol content. The genotype 9 year interaction was significant for all the traits under study which indicates differential reaction to the expression of quality characters over years. Fe content in blackgram genotypes showed significant positive phenotypic correlation with Zn content while at genotypic level in addition to Zn, it showed positive correlation with phytic acid and polyphenol content as well. This indicates that although the traits are genotypically correlated, the expression is masked by the environmental influence. This is further exhibited from low heritability estimates for phytic acid and polyphenol content among the genotypes.
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