Analysis of Physiological Genetic Variation of Apple Hybrid Variety‘Sushuai’

doi:10.11924/j.issn.1000-6850.casb17030042

Abstract

Abstract: This research provides a theoretic foundation for the further study on the desirable qualities?of ‘Su Shuai’. [methods] The hybrid?‘Su Shuai’, its male parent ‘Golden Delicious’ and female parent‘Indo’ were measured of the number and length of internodes, chlorophyll contents, fruits soluble solids and titrable?acids?contents, along with endogenous hormone contents in leaf. The paraffin section and scanning electron microscopy technology were employed to compare leaf structure of ‘Su Shuai’, ‘Golden Delicious’ and ‘Indo’. Moreover, parameters of photosynthetic gas exchange were also been studied. [Results]The internodes of ‘Su Shuai’ were significantly shorter than those of ‘Golden Delicious’ and ‘Indo’ in length, while the relative chlorophyll amount of which was significant higher than its parents. The titrable?acids?contents of ‘Su Shuai’ were significantly higher than ‘Golden Delicious’ while there is no significant difference of soluble solids between these two. The endogenous hormone abscisic acid (ABA), gibberellin (GA), indole 3 acetic acid (IAA) and zeatin riboside (ZR) contents of ‘Su Shuai’ were all difference compared with ‘Golden Delicious’ and ‘Indo’.The under the skin stomatal?of ‘Su Shuai’ was smaller than ‘Golden Delicious’ while higher than ‘Indo’ in length, with P>0. 01. The stomatal width of ‘Su Shuai’ is significant higher than that of ‘Indo’ and shows no significant difference with ‘Golden Delicious’. The stomatal density of ‘Su Shuai’ is higher than its parents with significant difference. The palisade tissue cells of ‘Su Shuai’ were inconsistent?in size, and were arranged in a relative messy with no obvious boundaries of sponge tissue. As for ‘Golden Delicious’ and ‘Indo’, the cells of palisade tissue set?close, neatly?arranged and has obvious boundaries with sponge tissue. For ‘Su Shuai’, the total thickness, on and under skins, palisade tissue and spongy tissue thickness and the ratio of palisade and spongy tissue of leaves were significantly higher than those of ''Golden Delicious'' and'' Indo''. [Conclusion] The diversity in traits that apple species ‘Su Shuai’ shows compared with its parents, provides Germplasm Resources to breeding of new apple cultivar.

蒋梦婷 and . Analysis of Physiological Genetic Variation of Apple Hybrid Variety‘Sushuai’[J]. Chinese Agricultural Science Bulletin, 2018, 34(7): 58-64.

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