Breeding in perennial fruit crops is time consuming process with relatively low success rate as compared with annual crops. Apple fruit coloration is painstaking as noticeable marker of maturity (early to late) and outer quality during the fruit breeding. The occurrence of spontaneous bud mutations in plants has often led to their subsequent development as commercial cultivars. Keeping in view, present investigation was undertaken to identify bud sports in apple (Malus domestica Borkh.) in H.P. of India. In this study, based upon pre-selection criteria such as time of colour development and time of fruit maturation were implemented, one bud sport ‘Kalpa 1’ was identified as distinctive late in fruit skin development as compared to fully red coloured fruits on its mother tree of cv. Starking Delicious in H.P. India with red streaked fruits over yellow ground colour on the bud sports did not mature even at harvesting, respectively. Apart from the distinguishing character for which the bud sports were identified, they also differed in fruit shape and size, fruit firmness, fruit maturity, TSS, acidity and starch iodine test strain area. The identified bud sport has unique character of late maturity indices in H.P. This unique variety can be grown in other temperate regions of India with the same soil and climatic condition.

与一年生作物相比，多年生水果作物的育种是一个耗时的过程，成功率相对较低。苹果果实的着色是果实育种过程中成熟（早到晚）和外部质量的明显标志。植物中自发芽突变的发生常常导致它们随后发展为商业栽培品种。同时考虑，本次调查，以查明在苹果芽运动（海棠 家蝇Borkh.）在印度的惠普。在这项研究中，根据颜色发育时间和果实成熟时间等预选标准，与母体上的全红色果实相比，一种芽运动“Kalpa 1”在果皮发育后期被确定为独特的简历树 在 HP India 的 Starking Delicious，在芽运动的黄色底色上有红色条纹的水果，即使在收获时也没有成熟。除了鉴定出芽运动的特征外，它们在果实形状和大小、果实硬度、果实成熟度、TSS、酸度和淀粉碘试验菌株面积方面也不同。确定的芽运动在 HP 中具有独特的晚熟指数特征 这种独特的品种可以在具有相同土壤和气候条件的印度其他温带地区种植。