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

摘要

Interspecific potato somatic hybrids (here after referred as 'cp/i-hybrids') derived earlier through protoplast fusion (Solarium tuberosum + S. cardiophyllum) were used in this study. The genetic potential of cp/i-hybrids was assessed based on the field performance in the Indian sub-tropical conditions. In general, cp/i-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 cp/i-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 c/j/i-hybrids viz., Crd 6, Crd 10 and Crdl6, 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.