Study on the Use of Heterosis of New Plant Type Rice Bred in IRRI

doi:10.3321/j.issn:1000-7091.2000.02.003

Abstract

Abstract: Theheterosis of yield and its component of F₁ between two good photoperiod (thermo) sensitive genic male sterile lines, N422s and Peiai 64s, and IRRI's new plant type lines, newly improved japonica varieties of North China type and Northeast type, Aus varieties of South Asian and early and mediate indica varieties of South China are analyzed. The results showed that the cross combinations made by Peiai 64s and New plant type lineshave strongheterosis in the fulled grain per plant, number of spike per plant and grain weight per plant, but the spike fertility is low. The new plant type lines can be used in the breeding program of the two-line intersubspecieshybrid rice if the problem of low seed set is well solved.

Key words: New plant type rice, Heterosis

CLC Number:

S511.103

CHEN Liang, SUN Chuanqing, JIANG Tingbo, LI Zichao, WANG Xiangkun. Study on the Use of Heterosis of New Plant Type Rice Bred in IRRI[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2000, 15(2): 11-14. doi: 10.3321/j.issn:1000-7091.2000.02.003.

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