Study on heterosis estimation and genetic analysis of Eucalyptus hybrids in cold area

doi:10.3969/j.issn.1000-2006.201605069

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (04): 55-63.doi: 10.3969/j.issn.1000-2006.201605069

Study on heterosis estimation and genetic analysis of Eucalyptus hybrids in cold area

LI Guangyou¹, XU Jianmin^1*, WANG Wei¹, WU Shijun¹, ZHU Ying'an¹, WANG Yingsheng², PAN Jian², GUO Hongying³, SHI Tingyou⁴

1. Research Institute of Tropical Forestry, CAF, Guangzhou 510520, China;
2. Lianshan Forest Farm of Guangdong Province, Lianshan 513200, China;
3. Sichuan Academy of Forestry, Chengdu 610081, China;
4. Chuxiong City Forestry Research Institute of Yunnan Province, Chuxiong 675005, China

Online:2017-08-18 Published:2017-08-18

Abstract

Abstract: 【Objective】 Select Eucalytpus hybrids that are adapted to north of Guangdong Province and other cool areas in southern China. 【Method】 Using ANOVA and BLUP to estimate the heterosis, breeding values, SCA(specific combining ability)and GCA(general combining ability)of various traits. We assessed 97 controled-pollination families, 15 open-pollination families and two clones from the Lianshan Forest Farm of Guangdong, China. 【Result】 There were significant differences in growth traits among tested families. The SV(average single-tree volume)values of the controled-pollination families including of No. 101, 14 and 74 exceeded the highest 0.191 4 m³value of No. 103 open-pollination family, and the SV values of 17 controled-pollination families, 288 trees exceeded the SV value of DH3229 control clone in the trials. There were 40 controled-pollination families that exceeded the overall average SV value in trial, and their SV value had 25.78% heterosis more than average value of 15 parents, 4.18% heterosis more than the same of clones'. The breeding value of 13 controled-pollination hybrids, including No. 101, 14 and 74, reached 0.02, and their phenotype values exhibited the same trend. 【Conclusion】 According to the GCA and SCA values analyzed, three females RT04(E. camaldulensis), D2(E. dunnii), and U64(E. urophylla), and five males KX10(E. grandis), 2B(E. benthamii), D17(E. dunnii), KX5(E. grandis)and DX19(E. grandis)could be used as elite parents for future breeding programs, and the superior families, including E. dunnii &#215; camaldulensis, E. urophylla &#215;(E. urophylla × tereticornis), and E. urophylla &#215; globulus, could be used as cloning materials, owing to their high SCA values(>0.05)and 50% relative effect SCAs.

CLC Number:

S758.5⁺2

LI Guangyou, XU Jianmin, WANG Wei, WU Shijun, ZHU Ying'an, WANG Yingsheng, PAN Jian, GUO Hongying, SHI Tingyou. Study on heterosis estimation and genetic analysis of Eucalyptus hybrids in cold area[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2017, 41(04): 55-63.

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Study on heterosis estimation and genetic analysis of Eucalyptus hybrids in cold area

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