Identification and Genetic Analysis of Gall Midge Resistance in Rice Germplasm 91-1A2.

Authors :: LU, Jia-shi
HE, Long-fei
XU, Jing
XU, Chun-yan
LI, Chuang-zhen
WEI, Su-mei
SU, Jian-mu
Source :: Rice Science; Jan2013, Vol. 20 Issue 1, p73-78, 6p
Publication Year :: 2013
Abstract: Abstract: Resistance to rice gall midge in rice germplasm 91-1A2 was identified and genetically analyzed. F<subscript>1</subscript>s of rice population were derived from 91-1A2 which crossed with rice materials Jinggui, TN1, W1263 (Gm1), IET2911 (Gm2), BG404-1 (gm3), OB677 (Gm4), ARC5984 (Gm5) and Duokang 1 (Gm6) as a male parent. The resistance of all parental lines and F<subscript>1</subscript>, BC<subscript>1</subscript>F<subscript>1</subscript> and F<subscript>2</subscript> populations to rice gall midge was identified. The results showed that 91-1A2 and all F<subscript>1</subscript>s were resistant to Chinese rice gall midge biotype IV. The segregation ratio of resistant plants to susceptible ones in BC<subscript>1</subscript>F<subscript>1</subscript> and F<subscript>2</subscript> were accorded with 1:3 and 9:7 rules by X<superscript>2</superscript> test, suggesting that the resistance of 91-1A2 to Chinese rice gall midge biotype IV was controlled by two dominant genes which were new resistance genes, non-allelic to the known rice gall midge resistance genes. [Copyright &y& Elsevier]

Subjects :: GALL midges
PLANT germplasm
COMPLEMENTATION (Genetics)
ALLELES
PLANT protection
PLANT populations

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