一个粳稻早熟突变体的遗传分析及育种应用潜力的初步评价
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摘要
来自粳稻‘寒丰’繁种圃的一个早熟突变体‘早寒丰’,其播始历期比野生型‘寒丰’提早15.2 d。对其生育期遗传分析表明,控制该早熟性状的基因为一对半显性核基因。以BT型粳稻不育系‘寒丰A’与‘早寒丰’连续回交,育成早熟粳稻新不育系‘早寒丰A’。以‘寒丰A’和‘早寒丰A’分别与‘湘晴’‘申恢254’‘R44’等3个粳稻恢复系配组,结果表明:‘早寒丰A’所配组合的播始历期为95.2—99.4 d,比‘寒丰A’所配组合的播始历期提早8.2—10.4 d,且其中一些组合产量降低不显著,因此‘早寒丰A’携带的早熟半显性核基因在杂交粳稻早熟育种中具有较好的利用价值。
An early-maturing rice mutant ' Zao-Han-Feng' from the breeding nursery of japonica rice'Han-Feng' was about 15.2 d earlier than the wild 'Han-Feng' in heading period,and the genetic analysis indicated that the ' Zao-Han-Feng' s early-maturing character was controlled by a pair of semidominant genes.A new sterile line ' Zao-Han-Feng A' was bred by the continuous backcross of the ' Zao-Han-Feng' with the BTtype sterile Hne ' Han-Feng A',and then the cross combinations of ' Han-Feng A' and ' Zao-Han-Feng A' were made respectively with 3 japonica rice restorers—' Xiangqing',' Shenhui 254' and ' R44'.The results showed that the heading periods of cross combinations with ' Zao-Han-Feng A' were 95.2—99.4 d and about 8.2—10.4 d earlier than those of cross combinations with ' Han-feng A',and some combinations had no significant decrease in yield,indicating that the semidominant early-maturing gene in the ' Zao-Han-Feng A' has a good applied value in breeding for early-maturing japonica rice hybrids.
An early-maturing rice mutant ' Zao-Han-Feng' from the breeding nursery of japonica rice'Han-Feng' was about 15.2 d earlier than the wild 'Han-Feng' in heading period,and the genetic analysis indicated that the ' Zao-Han-Feng' s early-maturing character was controlled by a pair of semidominant genes.A new sterile line ' Zao-Han-Feng A' was bred by the continuous backcross of the ' Zao-Han-Feng' with the BTtype sterile Hne ' Han-Feng A',and then the cross combinations of ' Han-Feng A' and ' Zao-Han-Feng A' were made respectively with 3 japonica rice restorers—' Xiangqing',' Shenhui 254' and ' R44'.The results showed that the heading periods of cross combinations with ' Zao-Han-Feng A' were 95.2—99.4 d and about 8.2—10.4 d earlier than those of cross combinations with ' Han-feng A',and some combinations had no significant decrease in yield,indicating that the semidominant early-maturing gene in the ' Zao-Han-Feng A' has a good applied value in breeding for early-maturing japonica rice hybrids.
引文
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[2]徐俊锋,魏祥进,江玲,等.我国部分早籼品种及杂交早籼骨干亲本抽穗期遗传分析[J].中国水稻科学,2010,24(3):215-222.
[3]邓晓建,周开达,李仁端,等.水稻品种生育期的遗传和基因定位[J].四川农业大学学报,2001,19(2):172-178.
[4]曾宪平,何跃忠.水稻CMS系“早显A”早熟性的遗传分析[J].西南农业学报,1998,11(S2):95-98.
[5]YANG Y J,WANG X D,WU X J,et al.The discovery genetic analysis and mapping of earliness rice(Oryza sativa L)D64 B[J].Acta Genetica Sinica,2005,32(5):495-500.
[6]DOI K,IZAWA T,FUSE T,et al.Ehd1,a B-type response regulator in rice,confers short-day promotion of flowering[J].Plant Cell,2004,18(8):926-936.
[7]PENG J H,HE Y Z,LIU B X.A new dominant earliness character of CMS line Zaoxian A and its application value in rice(Oryza sativa L)[J].Euphtica,1995,81:235-244.
[8]GAO H,JIN M N,ZHENG X M,et al.Days to heading 7,a major quantitative locus determining photoperiod sensitivity and regional adaptation in rice[J].PNAS,2014,111(46):16337-16342.
[9]李秀兰,姜日水,王平荣,等.水稻H14早熟性的遗传分析及基因定位[J].应用与环境生物学报,2008,14(3):332-336.
[10]朱文银,李文涛,丁效华,等.水稻显性早熟基因Ehd的SSR标记定位[J].华北农学报,2009,24(4):7-10.
[11]邓晓建,周开达,李仁端,等.水稻完全显性早熟性的发现和基因定位[J].中国农业科学,2001,34(3):233-239.
[12]周鹏飞,柳絮,张华,等.水稻抽穗期基因Rd6-F1的定位[J].山东农业科学,2015(2):12-15.