Heterosis Analysis of Photosynthetic Characteristics in Indica Hybrid Rice

doi:10.7668/hbnxb.2014.03.023

Abstract

Abstract: To verify the heterosis of photosynthetic characteristics of flag leaves, thirty hybrid rice combinations and their parents' were tested.The result were as follows, there were significant differences (P<0.01) for the photosynthetic characteristics in both the hybrid rice combinations and their parents.Among those parameters, photosynthetic rate had the biggest coefficient of variation in parents but stomatal conductance had the biggest in hybird rice cornbinations. And the rate of chlorophyll content (a) and chlorophyll (b) had the smallest both in parent and hybird rice combinations.The average of photosynthetic rate, stomatal conductance and transpiration rate of hybrid rice combinations were bigger than that of the parents.It indicated that it is conducive to breed high photosynthetic rate of hybrid rice combinations.Mid-parent heterosis were found in photosynthetic rate, stomatal conductance and transpiration rate, over high-parent heterosis were found in photosynthetic rate and stomatal conductance, below low-parent heterosis was found in intercellular CO₂ concentration, positive competitive advantages were found in transpiration rate and the rate of chlorophyll content(a) and chlorophyll (b).Transpiration rate of hybrid rice combinations were positively correlated with that parameters of male parent and mid-parents (P<0.05).

Key words: Hybrid rice, Parents, Photosynthetic characteristic, Heterosis

CLC Number:

S511.03

LIU Hong-mei, ZHOU Xin-yue, CHEN Jie, LI Hai-lin, QIU Ying-bo, LIU Jian-feng. Heterosis Analysis of Photosynthetic Characteristics in Indica Hybrid Rice[J]. journal1, 2014, 29(3): 122-127. doi: 10.7668/hbnxb.2014.03.023.

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