Vol. 6, Issue 4 (2018)
Studies on heterosis and combining ability for yield and its contributing traits in CMS based hybrids of Brassica juncea L.
Author(s): Rashmi, Neha Dahiya, Mahak Tufchi, Preeti Lohani, Ram Bhajan and Usha Pant
Abstract: Heterosis and combining ability for yield and its contributing traits from trail with 10 CMS lines, 3 testers and 30 alloplasmic hybrids were evaluated for 13 characters. Results indicated that ANOVA for line × tester revealed that treatment variances were highly significant for all the characters. Partitioning of total variance into variance due to parents, crosses and parent vs crosses revealed that there were significant parental differences for all characters except number of primary branches. All characters showed significant differences for parent vs crosses variance except days to 50% flowering, days to maturity, number of primary branches and siliqua length which exhibited that there is manifestation of heterosis due to interaction of lines and testers. However, all characters showed significant differences for crosses. Based on desirable GCA effects for seed yield per plant PYR-2009-13 along with PBR-357 and Maya were found to be promising lines while only IC-414317 showed promising among testers. PBR-357, PR-20 and Rohini were identified as promising donor for oil content among lines and IC-414322 in testers. Of these PBR-357, was found to have high GCA for seed yield per plant as well as oil content in converged with key component traits. 20% crosses had significant SCA effects for seed yield per plant while 36% crosses for oil content. Maya × IC-414317, Rohini × IC-414317 and EJ-22 × IC-414322 had manifested significant SCA effects for both of these end products in desirable direction. Frequency of superior crosses for mid-parent as well as better parent heterosis was very few in number for developmental traits except for plant height. Maya × IC-414317 manifested the highest heterosis followed by Maya × IC-414322 and PBR-357 × PR-2006-14 for seed yield per plant however, number of crosses displaying desirable heterosis for oil content was very limited.
Pages: 3347-3351 | 403 Views 62 Downloads
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How to cite this article:
Rashmi, Neha Dahiya, Mahak Tufchi, Preeti Lohani, Ram Bhajan, Usha Pant. Studies on heterosis and combining ability for yield and its contributing traits in CMS based hybrids of Brassica juncea L.. Int J Chem Stud 2018;6(4):3347-3351.
