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Open AccessArticle

Combining Ability of Sixteen USA Maize Inbred Lines and Their Outbreeding Prospects in China

by Ji-ying Sun 1,*,†, Ju-lin Gao 1,*,†, Xiao-fang Yu 1,†, Jian Liu 2,†, Zhi-jun Su 1, Ye Feng 3 and Dong Wang 3
1
College of Agronomy, Inner Mongolia Agricultural University, No.275, XinJian East Street, Hohhot 010019, China
2
Vocational and Technical College, Inner Mongolia Agricultural University, Baotou 014109, China
3
Tongliao Academy of Agricultural Sciences, Qianjiadian, Tongliao 028015, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Agronomy 2018, 8(12), 281; https://doi.org/10.3390/agronomy8120281
Received: 29 October 2018 / Revised: 18 November 2018 / Accepted: 23 November 2018 / Published: 27 November 2018
(This article belongs to the Special Issue Environmental and Management Factor Contributions to Maize Yield)
In China, there is an increasing need for greater genetic diversity in maize (Zea mays L.) germplasm and hybrids appropriate for mechanical harvesting. In order to test and distinguish American maize inbred lines with exceptional combining ability, four Chinese maize inbred lines (Chang7-2, Zheng 58, four-144 and four-287) were used to judge the combining ability and heterosis of 16 USA inbred lines by a NCII genetic mating method. The results showed that among the American inbred lines, 6M502A, LH208, NL001, LH212Ht, PHW51, FBLA and LH181 expressed good GCA for yield characteristics; while RS710, PHP76, FBLA, and PHJ89 showed excellent GCA for machine harvesting characteristics. Five hybrids (NL001 × Chang7-2, LH212Ht × Chang7-2, FBLA × four-144, LH181 × four-287, PHK93 × four-287) had better SCA values for yield characteristics, at 1.69, 1.07, 1.48, 1.84 and 1.05, respectively; while NL001 × Chang 7-2, 6M502A × Chang7-2, LH212Ht × Chang7-2, LH181 × four-287, PHW51 × Chang7-2 had better TCA values for yield characteristics, at 3.03, 2.80, 2.41, 2.19 and 1.91, respectively; NL001 × Chang7-2, 6M502A × Chang7-2, LH212Ht × Chang7-2, LH181 × four-287, PHW51 × Chang7-2 showed excellent Control Heterosis values, with 21.48%, 19.64%, 15.93%, 14.05% and 11.60% increases, respectively, compared to the check and potential for future utilization in Inner Mongolian corn production. View Full-Text
Keywords: USA inbred lines; combining ability; machine harvesting characteristics; yield characteristics; control heterosis USA inbred lines; combining ability; machine harvesting characteristics; yield characteristics; control heterosis
MDPI and ACS Style

Sun, J.-Y.; Gao, J.-L.; Yu, X.-F.; Liu, J.; Su, Z.-J.; Feng, Y.; Wang, D. Combining Ability of Sixteen USA Maize Inbred Lines and Their Outbreeding Prospects in China. Agronomy 2018, 8, 281.

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