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Articles by M. Ram
Total Records ( 2 ) for M. Ram
  B.A. Wani , M. Ram , Abrar Yasin and Ekta Singh
  The present study was aimed to determine whether physiological traits could be taken into the selection criteria in integration with yield and yield components to achieve a successful breeding programme. Analysis of variance revealed significant differences for MSS values of all 50 lines for all the traits under study. High Phenotypic Coefficient of Variation (PCV) and Genotypic Coefficient of Variation (GCV) on the basis of pooled data was obtained for grain yield per plot, tillers per m2, harvest index and 1000-grain weight. Among the physiological traits high PCV and GCV was obtained for seed vigour index and leaf nitrogen while chlorophyll-a, b and total chlorophyll records moderate estimates of PCV and GCV. Heritability accompanied with high genetic advance as percent mean was observed highest for grain yield per plot, seed vigour index, leaf nitrogen content, harvest index, spike length, grains per spike, 1000-grain weight, chlorophyll b and chlorophyll-a, suggesting selection for these traits may be rewarding. All the physiological traits along with yield components exhibited significantly positive correlation with grain yield per plot at both phenotypic and genotypic levels. On the basis of study it is suggested there is a great need to give emphasis on physiological breeding approach to integrate with conventional breeding methods as compliment factor to break present yield ceiling and develop photosynthetically efficient and stress tolerant wheat varieties. Further the above said physiological traits which have significant correlation with yield and high heritability accompanied with genetic advance should be taken into the selection criteria for breeding methods.
  B. Abrar Yasin , M. Ram , Shubhra Singh and B.A Wani
  India witnessed Green Revolution with the introduction of semi-dwarf wheat varieties like Kalyan Sona and Sonalika from CIMMYT Mexico in 1963. However, from last seven years the total wheat production remained stagnated. Therefore, present investigation was undertaken to determine yield ceiling, improvement brought in yield, yield attributes and leaf rust resistance in newly released wheat varieties. The trials were laid down in Randomized Block Design (RBD) with four replications during two consecutive years 2005-06 and 2006-07. Data were recorded on 8 quantitative characters and were subjected to different statistical analysis. Mean performance of yield, yield attributes and leaf rust resistance of 13 promising newly released wheat varieties were compared with Kalyan Sona and Sonalika (Checks). The pooled yield data of two years indicate that PBW-343 and HD-2733 are the top yielding varieties. PBW-343 showed significant improvement in the mean yield performance over Kalyan Sona but non-significant improvement over Sonalika. PBW-343 and HD-2733 recorded maximum number of tillers/plant, spike length, grain/spike, harvest index and 1000 grain weight. However, their differences in mean values were non-significant over checks. Almost all latest wheat varieties (except HUW-318, Veeri, K-816, Kalyan Sona and Sonalika) have shown good degree of resistance to leaf rust races. It is concluded from present investigation that in wheat yield ceiling has reached once again. There has been no significant improvement brought in yield and yield attributes through breeding researches in India since 1969-2005. Resistance to leaf rust has been appreciated.
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