Pedigree analysis of urdbean varieties released in India
DOI:
https://doi.org/10.53550/jfl.v18i2.2342Keywords:
Coefficient of parentage, Pedigree analysis, UrdbeanAbstract
Pedigree analyses were performed to quantify the ancestral contributions to 70 urdbean cultivars released in India during 1949 to 2003. From the analyses it is evident that these varieties could be traced back to 26 ancestors. The relative genetic contribution (RGC) from ancestors and coefficient of parentage for all the pairs of the urdbean cultivars were also computed. Five ancestors viz., T 9, D 6-7, G 31, Netiminumu and AB 1-33 together contributed 50% to the total genetic base. T 9, a selection from local collection of Bareilly (Uttar Pradesh), contributed as high as 30.06 % of the genetic base of the released cultivars. D 6-7 is a selection from local material fron Dhule (Bihar), while G 31 and Netiminumu were from Andhra Pradesh. The average 'r' value between cultivars was 0. 43. Between Co 1 and Co 4, it was 0.75, while between Vamban 1 and Khargone 3, it was 0.125. Extensive and repetitive use of superior genotypes with common ancestors explains as to why the genetic base of the released varieties in this crop is narrow and why the integration of new germplasm is of paramount importance for broadening the genetic base of the released varieties.
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