NDLI: Predicting hybrid fertility from maker-based genetic divergence index of parental varieties: implications for utilizing inter-subspecies heterosis in hybrid rice breeding

Content Provider	Springer Nature Link
Author	Liu, Ping Dan, Zhiwu Wang, Zhe Li, Shaoqing Li, Nengwu Yan, Huanxin Cai, Xingxing Lu, Bao Rong
Copyright Year	2014
Abstract	Utilizing inter-subspecies heterosis of indica-japonica rice hybrids is a potential solution to break the yield ceiling for hybrid rice breeding. However, the reduced panicle fertility (PF) of the inter-subspecies hybrids caused by reproductive isolation due to genetic divergence between parental varieties has hampered the effective utilization of the inter-subspecies heterosis. This is because significantly reduced fertility always leads to low yield of the F1 hybrids. To study the association between genetic divergence of indica-japonica parental varieties and panicle fertility of their inter-subspecies hybrids, we developed a method to determine the genetic divergence index (GDI) of the two parents, assisted by the insertion/deletion (InDel) molecular genotyping. Based on parents’ GDI, we produced 103 combinations of F1 hybrids whose parental varieties showed a wide range of indica-japonica genetic divergence. PF of all the F1 hybrids in different combinations was measured to analyze its association with GDI of their corresponding parents. A negative correlation between GDI of indica-japonica parental varieties and PF of their corresponding F1 hybrids was detected based on field experiments conducted in three independent locations. The results suggested that GDI of parental varieties can be used to predict PF of their indica-japonica hybrids before a hybridization experiment is conducted. The molecular-maker-based GDI provides a useful tool to assist in selecting indica and japonica parental varieties for hybrid rice breeding in a more designed manner to achieve reasonable heterosis and panicle fertilities in F1 hybrids.
Starting Page	47
Ending Page	57
Page Count	11
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	203
Issue Number	1
e-ISSN	15735060
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-09-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Crop improvement Genetic differentiation Hybrid fertility Parents Oryza sativa Sub-specific heterosis Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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STUDY OF HETEROSIS BY UTILISING CYTOPLASM1C GENETIC MALE STERILITY AND FERTILITY RESTORATION SYSTEM IN RICE (Oryza sativa I.)

HETEROSIS AND COMBINING ABILITY OF HYBRID RICE (Oryza sativa L.)

The extent of parental genotypic divergence determines maximal heterosis by increasing fertility in inter-subspecific hybrids of rice (Oryza sativa L.)

STUDIES ON GENETIC DIVERGENCE, HETEROSIS, COMBINING ABILITY OF PROMISING CMS AND ELITE MALE PARENTAL LINES FOR YIELD AND QUALITY TRAITS IN RICE (Oryza sativa L.)

GENETIC ANALYSIS OF CMS BASED HYBRIDS, DIVERGENCE AND STABILITY ANALYSIS OF POTENTIAL PARENTAL LINES IN RICE (Oryza sativa L.)

STUDY OF GENETIC VARIABILITY AND HETEROSIS IN RICE (Oryza sativa L.)

â€œCOMBINING ABILITY AND HETEROSIS ANALYSIS FOR IDENTIFYING ELITE PARENTS AND HYBRIDS IN RICE (Oryza sativa L.)â€

GENETIC DIVERGENCE FOR QUALITY TRAITS IN RICE (Oryza sativa L.)

HETEROSIS AND COMBINING ABILITY FOR YIELD AND QUALITY TRAITS IN HYBRID RICE (Oryza sativa L.)

Predicting hybrid fertility from maker-based genetic divergence index of parental varieties: implications for utilizing inter-subspecies heterosis in hybrid rice breeding

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