Progress and Perspectives of Distant Heterosis in Rice

Jiang, Deming; Nassirou, Tondi Yacouba

doi:10.1007/978-3-319-22521-0_7

Cited by 2 publications

(2 citation statements)

References 74 publications

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“…Rice is one of the most important staple cereals for global food security, and there is still great potential to elevate rice grain yields to address the needs of growing populations [1][2][3][4]. To date, rice breeding has experienced four significant stages of improvement in the forms of dwarf breeding, heterosis utilization, green super rice (GSR) cultivation, and rational design breeding in order to achieve a steady increase in rice grain yield [5][6][7][8][9][10][11]. Since the 1970s, hybrid rice has successfully led to a second quantum leap in rice yields through the exploitation and utilization of heterosis [12,13].…”

Section: Introductionmentioning

confidence: 99%

Combining Ability Analysis of Yield-Related Traits of Two Elite Rice Restorer Lines in Chinese Hybrid Rice

Wang

et al. 2023

IJMS

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Hybrid rice breeding is an important strategy for enhancing grain yield. Breeding high-performance parental lines and identifying combining abilities is a top priority for hybrid breeding. Yuenongsimiao (YNSM) and its derivative variety Yuehesimiao (YHSM) are elite restorer lines with a high ability of fertility restoration, from which 67 derived hybrid combinations have been authorized to different degrees in more than 110 instances in China. In this study, we found that YNSM and YHSM contained three candidate restorer-of-fertility (Rf) genes, Rf3, Rf4, and Rf5/Rf1a, that might confer their restoration ability. Subsequently, we investigated heterosis and combining ability of YNSM and YHSM using 50 F1 hybrids from a 5 × 10 incomplete diallelic mating design. Our results indicated that hybrid combinations exhibited significant genetic differences, and the additive effects of the parental genes played a preponderant role in the inheritance of observed traits. The metrics of plant height (PH), 1000-grain weight (TGW), panicle length (PL), and the number of spikelets per panicle (NSP) were mainly affected by genetic inheritance with higher heritability. Notably, the general combining ability (GCA) of YHSM exhibited the largest positive effect on the number of grains per panicle (NGP), NSP, PL, and TGW. Thus, YHSM had the largest GCA effect on yield per plant (YPP). In addition, the GCA of YNSM exhibited a positive impact on YPP, mainly due to the critical contribution of seed setting percentage (SSP). Moreover, YNSM and YHSM exhibited negative GCA effects on PH, implying that YNSM and YHSM could effectively enhance plant lodging resistance by reducing the plant height of the derived hybrids. Remarkably, among the hybrids, Yuanxiang A/YNSM (YXA/YNSM), Shen 08S/Yuemeizhan (S08S/YMZ), and Quan 9311A/YHSM (Q9311A/YHSM) represent promising new combinations with a higher specific combining ability (SCA) effect value on YPP with a value more than 3.50. Our research thus highlights the promising application for the rational utilization of YNSM and YHSM in hybrid rice breeding.

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Section: Introductionmentioning

confidence: 99%

Combining Ability Analysis of Yield-Related Traits of Two Elite Rice Restorer Lines in Chinese Hybrid Rice

Wang

et al. 2023

IJMS

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“…However, as the genetic difference between the parents increases to a certain extent, reproductive isolation will occur, which leads to a loss of grain yield of their hybrids. Reproductive isolation is a main obstacle for exploiting the distant heterosis in rice (Bouharmont, Olivier, & Chassart, 1985; Jin & Nassirou, 2015).…”

Section: Introductionmentioning

confidence: 99%

Exploiting interspecific heterosis between African rice and Asian rice

Sun

Xie

et al. 2020

Crop Science

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The objective of this study was to explore the heterosis of partial interspecific hybrids between African rice (Oryza glaberrima Steud.) and Asian rice (Oryza sativa L.) and its correlation with genetic distance. Sixty‐nine rice accessions including 57 introgression lines (ILs) were tested for population structure and genetic distance. Forty‐nine crosses between ILs and a test variety, Shengtai1 (ST1), were evaluated for midparent heterosis of nine agronomic traits. Population structure, genetic distance, and the proportion of O. glaberrima genome (PGG) of ILs and heterosis of the test crosses were estimated and analyzed. The PGG of the ILs ranged from 1.22 to 49.71%, with an average of 15.29%. The genetic distance between parents of the tested crosses was positively correlated to the PGG of ILs (r = .95, P < .01). Positive heterosis was scored on plant height (12.23%), panicles per plant (19.97%), panicle length (10.37%), spikelets per panicle (24.06%), thousand‐grain weight (14.00%), length/width ratio of grain (0.03%), and grain yield per plant (60.77%) of the partial interspecific hybrids. Although the introgression of more African genomic genes could effectively increase the genetic distance between ILs and the test variety that lead to positive heterosis for most agronomic traits, it could also increase the possibility of the occurrence of interspecific sterility that might decrease the seed setting rate and result in negative heterosis (−2.57%). These data indicated that the introgression of African rice genes into the genome of Asian rice could effectively broaden the genetic diversity, and the deployment of ILs as parents could be a potential way for exploiting interspecific heterosis in rice.

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Progress and Perspectives of Distant Heterosis in Rice

Cited by 2 publications

References 74 publications

Combining Ability Analysis of Yield-Related Traits of Two Elite Rice Restorer Lines in Chinese Hybrid Rice

Combining Ability Analysis of Yield-Related Traits of Two Elite Rice Restorer Lines in Chinese Hybrid Rice

Exploiting interspecific heterosis between African rice and Asian rice

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