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对以M .2 7EMLA、M .2 6EMLA和Mark为砧的Liberty、NY7541 4— 1、NY74 82 8— 1 2、NY6570 7— 1 9和McShay等苹果品种的生长、早熟性、产量和果实大小等项目进行的研究表明 ,Liberty、McShay、NY74 82 8— 1 2的树体大于NY7541 4— 1、NY6570 7— 1 9的树体最小。就砧木而言 ,以Mark为砧的苹果品种树体大于以M .2 6为砧的 ,以M .2 7为砧的树体最小。本文中的品种和砧木对树体的生长的影响没有交互作用。NY74 82 8— 1 2在定植后第 3、4年花量最大 ,NY6570 7— 1 9的最少。 1 993年时以Mark为砧的树花量比以M .2 6的为最多 ,以M .2 7为砧的开花量最少。Liberty、NY7541 4— 1和NY74 82 8— 1 2的累计产量比McShay和NY6570 7— 1 9的高。以Mark为砧的树累计产量多于以M .2 6为砧的 ,以M .2 7为砧的品种产量最低。NY6570 7— 1 9果形最大 ,NY74 82 8— 1 2的最小。以M .2 7为砧的树所结果实比以M .2 6和Mark为砧的小。NY7541 4— 1的树势中庸 ,早熟 ,高产 ,产量效率高 ,果实大小适度。NY74 82 8— 1 2在本试验中的表现也较好 ,但它对苹果黑星病只具Vm抗性而不具Vf抗性 ,故不可能作为新品种定名。在这些抗病品种中 ,根据早熟性、树势、产量和果形大小来看 ,Liberty和NY7541 4— 1具最佳的商品生产潜力。以
Growth, precocity, yield and fruit size of Liberty, NY7541 4- 1, NY74 82 8- 1 2, NY6570 7- 1 9 and McShay et al., Cultivars M.27EMLA, M.26EMLA and Mark, The results of the study showed that the tree body of Liberty, McShay, NY74 82 8- 1 2 was the smallest than that of NY7541 4- 1 and NY6570 7- 9. For rootstocks, the apple tree with Mark anvil was larger than the tree with M.26 as the rootstock and M.27 as the rootstock. There is no interaction between the cultivars and rootstocks on the tree growth in this paper. NY74 82 8- 1 2 had the highest flower number in the third and fourth year after colonization, with the least amount of NY6570 7- 9. In 1993, the proportion of flowers with Mark as anvil was the highest in M.26 and that with M.27 was the lowest. The cumulative yields of Liberty, NY7541 4- 1 and NY74 82 8- 1 2 were higher than those of McShay and NY6570 7-19. The cumulative yield of trees with Mark as anvil was more than that of M.26 with the lowest yield of M.27. NY6570 7- 1 9 Largest fruit shape, NY74 82 8- 1 2 Min. The tree with M.27 as the root was smaller than the M.26 and Mark as the anvil. NY7541 4- 1 moderate tree-based, precocious, high yield, high yield and fruit size is moderate. NY74 82 8- 1 2 performed better in this experiment, but it had Vm resistance but no Vf resistance to apple scab and therefore could not be named as a new variety. Among these resistant varieties, Liberty and NY7541 4- 1 have the best potential for commercial production, based on their precocity, tree vigor, yield and fruit size. To