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Evaluation of Interspecific Somatic Hybrids of Potato (Solanum tuberosum) and Wild S. cardiophyllum for Adaptability, Tuber Dry Matter, Keeping Quality and Late Blight Resistance

Luthra, Satish Kumar, Tiwari, Jagesh Kumar, Kumar, Vinod, Lal, Mehi
Agricultural research 2019 v.8 no.2 pp. 158-164
Phytophthora infestans, Solanum cardiophyllum, Solanum tuberosum, crop yield, dry matter content, genetic traits, interspecific hybridization, leaves, parents, potatoes, protoplast fusion, somatic hybridization, storage quality, tubers, vigor
Interspecific potato somatic hybrids (here after referred as ‘cph-hybrids’) derived earlier through protoplast fusion (Solanum tuberosum + S. cardiophyllum) were used in this study. The genetic potential of cph-hybrids was assessed based on the field performance in the Indian sub-tropical conditions. In general, cph-hybrids exhibited higher plant stand, poor plant vigour and late foliage maturity as compared to the control potato var. Kufri Bahar. Yield performance of cph-hybrids was poor as compared to the control, but produced 3–6 times higher marketable tuber yield than the wild parent (S. cardiophyllum). All cph-hybrids possessed significantly higher tuber dry matter content (≥ 24%) than the parents (20.82%) and var. Kufri Bahar (18.52%), excellent keeping quality and showed high resistance to late blight. Thus, based on this study the promising cph-hybrids viz., Crd 6, Crd 10 and Crd16, can be used as parents in breeding for the improvement of important traits viz., higher tuber dry matter content, better keeping quality and high late blight resistance, along with adaptability under sub-tropical conditions.