Combining ability analysis on rhizomatousness via incomplete diallel crosses between perennial wild relative of rice and
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Combining ability analysis on rhizomatousness via incomplete diallel crosses between perennial wild relative of rice and Asian cultivated rice Zhiquan Fan . Kai Wang . Yourong Fan . Li-Zhen Tao . Jiangyi Yang
Received: 23 June 2020 / Accepted: 6 August 2020 Ó Springer Nature B.V. 2020
Abstract Compared with annual cultivated rice, perennial rice had great advantages of soil erosion control, labor saving, water and fertilizer management, etc. As the key organ for perenniality, rhizome can help grasses to achieve rapid expansion to occupy more environmental resources, and withstand the harsh environmental conditions. Oryza longistaminata, a perennial wild relative of rice with vigorous rhizomes, is an ideal donor for transferring perenniality to Asian cultivated rice (Oryza sativa). However, some hybrid F1 between O. longistaminata and cultivated rice didn’t have rhizomes. Obtaining rhizomatous hybrid progeny becomes a prerequisite for the rhizomes study. In this work, four varieties of O. sativa and three accessions of O. longistaminata were used to carry out an incomplete diallel cross
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10681-020-02676-w) contains supplementary material, which is available to authorized users. Z. Fan K. Wang Y. Fan J. Yang (&) State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, China e-mail: [email protected] L.-Z. Tao State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
experiment. It was found that most F1 hybrids had rhizomes with varying length and numbers. Data analysis showed that the general combining ability (GCA) of the female parents had significant effect on rhizome-related trait of the F1s. Nevertheless, the GCA of the male parents and special combining ability of the hybrid combination played minor effect. And we speculated that the appropriate choice for female parents is more crucial to obtain rhizomatous hybrid. As the first incomplete diallel cross between O. longistaminata and O. sativa, this work would be benefit to appropriate parent selection for genetic research and breeding of perennial rice. Keywords Rhizome Oryza longistaminata Perennial rice Diallel crosses Combining ability
Introduction As a staple food for most of the world’s population, rice is vital to global food production and consumption (Nguyen and Ferrero 2006). However, the sustainable supply of rice has run into bottleneck in recent years (Ray et al. 2012). One remarkable way to increase the yield of annual crops, including rice, is to increase the consumption of fertilizers, pesticides and water resources, together with significant labor input (Wagoner 1990). This situation is particularly conspicuous
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in developing countries (Hashemi et al. 2014). However, suc
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