Analysis of Grain Type and Physiological Characteristics for a Large Grain Rice

doi:10.7668/hbnxb.20191502

Abstract

Abstract: The purpose of this study is to provide guidance for the selection and breeding of new varieties of high quality and high yield large grain rice,the differences of morphology and physiological indexes between large-grain rice material 0183 and conventional rice variety 9311 during the growth and development were measured respectively at the seedling and maturity stages,the preliminary results also lay the foundation for genetic analysis,gene localization and cloning of large grain materials. Compared with conventional rice variety 9311,0183 showed significant differences in grain length,grain width and grain thickness,at the same time,the weight of 0183 thousand grains was significantly higher than that of 9311. In addition,we also analyzed the physiological indexes of 0183 at the seedling stage and maturity stage,the results showed that the content of chlorophyll in the leaves of large-grained material 0183 was higher in the mature stage, the soluble sugar content in the leaves at the mature stage and the seedling stage was significantly higher than that of the control variety 9311, while the soluble protein content in the leaves at the mature stage was significantly higher than that of the control variety 9311, indicating that large grain material 0183 has strong photosynthesis at the later stage of growth and development,which might be related to its final yield formation,meanwhile,large-grain material 0183 had the advantage of participating in the physiological recovery of osmotic regulation. In addition,the proline content of seedling 0183 was significantly higher than that of control 9311,but it was lower in the later stage of growth and development,and the proline content of 9311 was higher than that of large-grain 0183 from seedling stage to maturity stage,the results showed that the stress resistance of large-grain material 0183 was weaker than that of the control variety 9311 with the growth and development,and it might be more affected by the environment in the formation of the final yield in the later stage. Large grain rice grains had significant advantages and were very important for rice yield. However,we were sensitive to the environment during growth and development,so the final yield couldn't be maintained stable,which was also the key point to be broken through in the cultivation of excellent large grain varieties.

Key words: Rice, Production, Large grain, Physiological indexes, Grain type

CLC Number:

S511.01

JIANG Dan, WEN Huan, PAN Shanshan, LAN Shiqi, NAN Wenbin, LIANG Yongshu, ZHANG Hanma, QIN Xiaojian. Analysis of Grain Type and Physiological Characteristics for a Large Grain Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(S1): 126-132. doi: 10.7668/hbnxb.20191502.

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