International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 5
First page : (725) Last page : (735)
Article doi: http://dx.doi.org/10.18782/2320-7051.2780

Combining Ability Analysis: Physiological Traits for High Temperature Stress Tolerance in Indian Mustard [Brassica juncea (L.) Czern & Coss.]

Baldeep Singh*, N. K. Thakral, Renu Munjal and Geeta Boken
Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar
*Corresponding Author E-mail: baldeep55@pau.edu
Received: 1.04.2017  |  Revised: 8.05.2017   |  Accepted: 16.05.2017  

 ABSTRACT

The Effects of high temperature stress during terminal stage were investigated on canopy temp. (0C) at 40 DAS, 50 DAS, 60 DAS, 70 DAS, chlorophyll fluorescence at 40 DAS, 50 DAS, 60 DAS, 70 DAS and seedling mortality (%) of 36 Indian mustard [B. juncea (L.) Czern & Coss.] genotypes along with their F­1s. during rabi, 2014-15. The genotypes were grown in randomized complete block design with three replications in two environments, viz., E1 (31st October sowing) and E2 (17th November sowing). Half diallel crosses of Indian mustard [B. juncea (L.) Czern & Coss.] genotypes along with their F­1s were evaluated for analysis of variance based on Griffing’s method revealed significant mean squares of general combining ability (gca) and specific combining ability (sca) for all most the traits. Mean squares due to parent v/s crosses were also significant for all the traits which depicted presence of heterosis for all the traits, except for canopy temperature at 50 DAS, chlorophyll fluorescence(Fv/Fm)at 40 DAS, chlorophyll fluorescence(Fv/Fm) at 50DAS and 60 DAS in timely sown condition and canopy temperature at 50 DAS and 70DAS in late sown condition. In the present study, an overall appraisal of gca effects revealed that parent RH0735 and BPR349-9 in timely sown condition and RH0116 and RH0555A late sown condition were good combiners for the majority of characters. High gca effects are related to additive gene effects or additive x additive interaction effects which represent the fixable genetic component of variation. Hence these parents could be efficiently used for exploiting seed yield. For seed yield the crosses RH 8814 x RH0555A, RH0644 x BPR543-3 and BPR 349-9 x RH0644 in normal environment and crosses RH0555A x RH0644, RH 0735 x RH 0116and BPR 349-9 x RH0644 were identified as promising on the basis of their high significant SCA effects.These crosses could be extensively used in breeding programme to develop superior segregants could be derived in further breeding programmes.

Key words: Brassica Juncea, Half Diallel, Gca, Sca, Yield Components Physiological Traits.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Singh, B., Thakral, N.K., Munjal, R. and Boken, G., Combining Ability Analysis: Physiological Traits for High Temperature Stress Tolerance in Indian Mustard [Brassica juncea (L.) Czern & Coss.], Int. J. Pure App. Biosci.5(5): 725-735 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2780