Hemant Kumar Yadav* and Sant Prasad Singh
National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001
*Corresponding author: h.yadav@nbri.res.in
Abstract: The degree of heterosis in F1 progenies and inbreeding depression in F2 generations was studied for seed and opium yield in opium poppy (Papaver somniferum L.) in set of crosses derived from partial diallel breeding design. Mid and better parent heterosis for seed yield was recorded in between –48.35 to 87.69% and –54.38 to 71.15% respectively. Likewise, for opium yield it varied from –39.06 to 71.13% and -42.74 to 52.04% for mid and better parent respectively. Significant and desirable heterosis over mid and better parent for seed yield was observed in forty five and twenty six crosses respectively. The crosses ND1002 x NBRI-11 and ND1002 x BR241 showed higher better parent heterosis both for seed and opium yield. Considerable amount of inbreeding depression in F2 generation were also recorded. Significant inbreeding depression in F2 generation were observed in seven crosses for seed yield/plant, and twenty two for opium yield/plant indicating deterioration in their performance in F2 generation. The magnitude of inbreeding depression varied from –125.60 to 24.16% and -60.14 to 33.07% for seed and opium yield/plant respectively.
Keywords: Heterosis, Inbreeding depression, Opium poppy
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