Cultivar evaluation and essential test locations identification for sugarcane breeding in China.

Jun Luo,Hua Zhang,Yong-Bao Pan,Rukai Chen,Zuhu Deng,Liping Xu,Zhaonian Yuan,Youxiong Que

doi:10.1155/2014/302753

Jun Luo, Hua Zhang + Show 6 more

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https://doi.org/10.1155/2014/302753

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Abstract

The discrepancies across test sites and years, along with the interaction between cultivar and environment, make it difficult to accurately evaluate the differences of the sugarcane cultivars. Using a genotype main effect plus genotype-environment interaction (GGE) Biplot software, the yield performance data of seven sugarcane cultivars in the 8th Chinese National Sugarcane Regional Tests were analyzed to identify cultivars recommended for commercial release. Fn38 produced a high and stable sugar yield. Gn02-70 had the lowest cane yield with high stability. Yz06-407 was a high cane yield cultivar with poor stability in sugar yield. Yz05-51 and Lc03-1137 had an unstable cane yield but relatively high sugar yield. Fn39 produced stable high sugar yield with low and unstable cane production. Significantly different sugar and cane yields were observed across seasons due to strong cultivar-environment interactions. Three areas, Guangxi Chongzuo, Guangxi Baise, and Guangxi Hechi, showed better representativeness of cane yield and sugar content than the other four areas. On the other hand, the areas Guangxi Chongzuo, Yunnan Lincang, and Yunnan Baoshan showed strong discrimination ability, while the areas Guangxi Hechi and Guangxi Liuzhou showed poor discrimination ability. This study provides a reference for cultivar evaluation and essential test locations identification for sugarcane breeding in China.

Highlights

Sugarcane (Saccharum spp. hybrids) is an important sugar crop in China
Seven experimental sites within the major sugarcane planting areas were selected for representativeness analysis, including Guangxi Liuzhou (GXLZ; E 109∘22󸀠, N 24∘28󸀠; altitude 99.1 m; yellow soil), Guangxi Chongzuo (GXCZ; E 108∘32󸀠, N 22∘56󸀠; altitude 78 m; loam soil), Guangxi Laibin (GXLB; E 109∘05󸀠, N 23∘46󸀠; altitude 95 m; sandy soil), Guangxi Baise (GXBS; E 106∘98󸀠, N 23∘68󸀠; altitude 82.5 m; sandy soil), Guangxi Hechi (GXHC; E 108∘05󸀠, N 24∘05󸀠; altitude 110 m; red loam), Yunnan Baoshan (YNBS; E 98∘89󸀠, N 24∘91󸀠; altitude 670 m; sandy soil), and Yunnan Lincang (YNLC; E 99∘57󸀠, N 24∘05󸀠; altitude 1030 m; red loam)
Funong 39 (Fn39) and Gannan 02-70 (Gn02-70) had average cane yields of 96.46 Mg⋅ha−1 and 93.56 Mg⋅ha−1, respectively, which were equal to the cane yield of Roc22

Summary

Introduction

Its planting acreage accounted for 92% of the total sugar crops and reached 1.586 million ha in 2012. The ROC (People’s Republic of China) cultivars from China Taiwan account for more than 80% of the total sugarcane planting area in Mainland China, resulting in a short harvesting season with low average sugar yield and serious pests in large area [1]. Sugarcane breeding and cultivar distribution should be accelerated to achieve environment suitable cultivations of multiple cultivars with different maturity date (early, intermediate, and late). In regional trials of cultivars, the yielding ability and stability of the sugarcane cultivars are evaluated, and new cultivars suitable to specific areas may be identified, leading to the multicultivar distribution [1,2,3,4]. It is vital to find out a proper program to statistically analyze the data to avoid biased evaluation of cultivars [5, 6]

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