Heterosis and Inbreeding Depression in Linseed (Linum usitatissimum L.)

Half Diallel Analysis for Estimation of Heterosis for Phonological Traits in Linseed (Linum usitatissimum L)

“…Genotypes shows early maturity thus can be on immense use in the future breeding programme. These findings are in conformity with the findings of , , Singh et al, (1987), Saraswat et al, (1993, Verma et al, (1993), Mishra and Rai (1996), Patel et al, (1998), Ratnaparkhi et al, (1998, Kumar et al, (2000), Yadav and Srivastava (2002), Swarnakar et al, (2003), Ratnaparkhi et al, (2004, Sharma et al, (2005), Bhateria et al, (2006) Sood et al, (2006, Pant et al, (2007) and Pant et al, (2008).…”

“…Similar trends for variance and its components were also reported by Rai and Das (1974), Govind and Murty (1979), , Patil and Chopde (1983), Singh and Sindhu(1986), Thakur et al, (1986), Dakhore et al, (1987), Singh et al, (1987), Goray et al, (1990), Mishra andRai (1993), Saraswat et al, (1993), Verma et al, (1993), Pillai et al, (1995, Mishra and Rai (1996), Verma and Mahta (1996), Yadav (1997), Bhateria et al, (2001, Kumar et al, (2002), Ratnaparkhi et al, (2004, Sharma et al, (2005), Bhateria et al, (2006, Sood et al, (2006), Pant et al, (2007) and Pant et al, (2008) in linseed.…”

Estimation of Heterosis and Inbreeding Depression in Linseed (Linum usitatissimum L.) for Yield, its Attributing Traits and Oil Content

“…Such crosses could prove useful in diallel selective mating system (Tonde et al, 2016). Our results are also in conformity for seed yield per plant with earlier workers Srivastava et al, (2003) and Swarnkar et al, (2003) for days to 50% flowering, number of primary branches per plant, days to maturity and 1000-seed weight (Kiran and Kanojia, 2014), for days to 50% flowering, days to maturity, plant height, number of primary branches per plant, number of capsules per plant, number of seeds per capsule and seed yield per plant (Sharma et al, 2018), for days to 50% flowering, plant height, number of primary branches per plant, number of capsules per plant and 1000-seed weight (Ahmad et al, 2018). Thus the crosses showing significant economic heterosis in some crosses associated with high degree of inbreeding depression, in such hybrids significant heterosis in F 1 and high degree of inbreeding depression in F 2 could be attributed to high magnitude of nonadditive gene effects.…”

“…It was also found that increase in seed yield in these crosses were mostly due to desirable heterotic response of important component traits like primary branches per plant, number of capsules per plant, number of seeds per capsule, capsule diameter and test weight. Linseed workers like Ahmad et al,(2018), Sharma et al, (2018), Reddy et al, (2013c) and Singh et al, (2014) have also reported the contribution of these components to the heterosis for seed yield per plant.. Inbreeding depression in F 2 generation was estimated for all the characters under study. The result indicated that three crosses (Himalshi-2 x Meera, Mukta x SLS-61 and Mukta x Meera) for days to maturity, five crosses (Himalsi-2 x SLS-61,Himalsi-2 x BAU-13-1, Himalsi-2 x Meera, Mukta x SLS-61 and Mukta x BAU-13-1) for technical height, one cross (Himalsi-2 x BAU-13-1) for plant height, four crosses (Himalsi-2 x SLS-61,Himalsi-2 x BAU-13-1,Mukta x SLS-61and Mukta x Meera) for number of primary branches per plant, three crosses (Himalsi-2 x SLS-61, Mukta x SLS-61and Mukta x BAU-13-1) for number of capsules per plant, four crosses (Himalsi-2 x SLS-61, Himalshi-2 x BAU-13-1, Himalsi-2 x Meera, Mukta x SLS-61) for number of seeds per capsule, three crosses (Himalsi-2 x BAU-13-1, Himalsi-2 x Meera and Mukta x Meera) for capsule diameter, four crosses (Himalsi-2 x SLS-61, Himalshi-2 x BAU-13-1, Mukta x SLS-61and Mukta x Meera) for seed yield per plant, two crosses (Himalsi-2 x BAU-13-1and Mukta x Bau-13-1) for 1000-seed weight and one cross (Himalsi-2 x BAU-13-1) for oil content revealed significant positive inbreeding depression indicating deterioration in their performance in next generation.…”

“…The cross Mukta x Meera showed heterotic for technical height with the value of -22.56 per cent, four crosses (Himalsi-2 x SLS-61, Himalsi-2 x BAU-13-1, Himalshi-2 x Meera and Mukta x SLS-61 for number of seed per capsules, one cross (Himalshi-2 x Meera) for capsule diameter, five crosses (Himalsi-2 x SLS-61, Himalsi-2 x BAU-13-1, Himalshi-2 x Meera, Mukta x SLS-61 and Mukta x Meera) for seed yield per plant and four crosses (Himalsi-2 x BAU-13-1, Mukta x SLS-61,Mukta x BAU-13-1 and Mukta x Meera) for test weight and one cross (Mukta x BAU-13-1) for oil content. The result of previous workers are also in agreement of our findings for days to 50% flowering, seed yield per plant and plant height (Kiran et al,2012), for number of primary branches per plant, number of capsules per plant, 1000-seed weight, seed yield per plant, plant height and number of seeds per capsule (Kumar et al, 2013), for seed yield per plant, days to 50% flowering, number of capsules per plant, and oil content (Pali and Mehta, 2014a), for plant height, days to 50% flowering, number of capsules per plant, 1000-seed weight and seed yield per plant (Reddy et al, 2013c) and for both days to 50% flowering, days to maturity, plant height, number of primary branches per plant, number of capsules per plant, number of seeds per capsule and seed yield per plant (Ahmad et al, 2018 andSharma et al, 2018). While considering the significant and useful heterosis over mid parent, better parent and economic parent, the best cross was Himalsi-2 x SLS-61for seed yield per plant.…”