A half-sib progeny test and juvenile selection of Trachycarpus fortunei

doi:10.3969/j.issn.1000-2006.201908002

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (5): 78-84.doi: 10.3969/j.issn.1000-2006.201908002

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A half-sib progeny test and juvenile selection of Trachycarpus fortunei

PENG Yang¹(), LU Yuetang², ZHAO Yang¹^,^*(), XIAO Feng¹

1. College of Forestry, Guizhou University, Guizhou Provincial Forest Resources and Environment Research, Key Lab of Forest Cultivation in Plateau Mountain of Guizhou, Guiyang 550025, China
2. Dushan State Forest Farm of Guizhou, Dushan 558200, China

Received:2019-08-02 Revised:2019-11-04 Online:2020-10-30 Published:2020-10-30
Contact: ZHAO Yang E-mail:1948208030@qq.com;zhy737@126.com

Abstract

Abstract:

【Objective】The juvenile selection and breeding of forest palm are beneficial to shorten the breeding cycle and speed up the breeding process. Palm(Trachycarpus fortunei) is a widely cultivated economic species in the south of China, that plays an important role in garden and fiber industry. In order to explore the growth regularity of palm seeding and select the fast-growing families with a good genetic quality, this study is focused on the growth variability of seeding traits of palm among different half-sib families. The purpose was to provide a valuable reference for genetic improvement of palm.【Method】In this study,the 1.5-year-old seedlings of 72 half-sib families of palm were used as the research materials. Using a completely randomized block design, the six growth traits of seedling height, diameter, dry weight, fresh weight, number of the stripe leaf and palmate leaf of palm were investigated. Then, the SPSS 21.0 software was used for an analysis of variance, and the HalfsibSS 1.0 software was used to estimate genetic parameters and the genetic correlation analysis. The elite families were selected by the cluster analysis and level of the trait showing analysis. And the individual selection was carried out to select excellent individuals.【Result】The growth trait statistics and analysis of variance at the seedling stage showed that the phenotypic variation of growth traits among different families was abundant and extremely significant (P<0.001), which provided the basis for breeding excellent families. The results of the estimation of genetic parameters indicated that the family heritability of the six growth traits ranged from 0.842 to 0.961, and the individual heritability ranged from 0.490 to 1.850, all of which showed a strong inheritance. They were specifically manifested as height>striped leaf amount >diameter>dry weight>fresh weight>palm leaves amount. The results of the genetic correlation analysis between the six traits showed that the stripe leaves amount was negatively related to the other traits, and the other traits were positively related. Based on the selection of diameter, dry weight and palm leaves amount, seven elite families were selected. Compared with the selected population, the realistic gain of diameter, dry weight and number of palmate leaves amount of the selected families increased 18.03%, 33.50% and 26.77%, respectively. Its genetic gain was 16.28%, 29.38% and 22.51%, respectively. Based on the selection of seedling height, 32 elite individuals were selected from seven excellent families. The genetic gain of diameter, dry weight and palmate leaf amount increased to 42.72%, 97.86% and 59.82%, respectively. The realistic gain was 60.77%, 139.20% and 85.09%, respectively.【Conclusion】The seedling of palm has a great potential for breeding .Its early selection can effectively improve the genetic quality and shorten the breeding cycle. The selected families and elite individuals can provide excellent breeding materials and aid subsequent research on palm.

Key words: palm(Trachycarpus fortunei), half-sib families, genetic analysis, progeny test, juvenile selection

CLC Number:

S762

PENG Yang, LU Yuetang, ZHAO Yang, XIAO Feng. A half-sib progeny test and juvenile selection of Trachycarpus fortunei[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(5): 78-84.

Figures/Tables 8

Table 1

Table 2

Table 3

The estimation of genetic parameters in half-sibfamilies of T. fortunei at seedling stage"

性状trait	$σ f 2$	$σ e 2$	C_CVG /%	C_CVP /%	$h 2 f$	$h 2 i$
H	49.853 (8.717)	60.489(1.939)	14.44	30.35	0.960(0.008)	1.805(NA)
D	0.024(0.005)	0.117(0.004)	11.05	35.45	0.903(0.021)	0.703(0.110)
W_F	29.318(5.801)	192.549(6.173)	17.33	61.74	0.854(0.031)	0.623(0.103)
W_D	6.334(1.218)	35.172(1.128)	19.93	66.89	0.877(0.026)	0.623(0.103)
N_S	0.238(0.044)	0.896(0.029)	11.93	35.07	0.910(0.019)	0.853(0.126)
N_P	0.230(0.046)	1.683(0.054)	17.44	64.61	0.842(0.034)	0.490(0.088)

Table 3

Fig.1

Fig.2

Fig.3

Table 4

Table 5

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性状 trait	最小值 min	最大值 max	均值 mean	标准差 SD	变异系数/% CV
H/cm	37.260	68.300	48.892	10.48	21.43
D_I/cm	0.988	1.799	1.402	0.37	26.38
W_F/g	20.624	46.219	31.246	14.74	47.18
W_D/g	8.128	19.041	12.628	6.37	50.45
N_S/片	3.000	4.970	4.090	1.05	25.78
N_p/片	1.700	4.100	2.750	1.37	49.77

性状 trait	变异来源 source of variation	自由度 df	均方 MS	F	P
H/ cm	区组间 between blocks	2	61.520	1.017 0	0.361 9
	家系间 between families	71	1 555.880	25.721 8	<0.001
	区组×家系 block×family	142	61.540	1.017 4	0.430 2
D / cm	区组间 between blocks	2	0.180	1.544 1	0.213 8
	家系间 between families	71	0.800	6.864 6	<0.001
	区组×家系 block×family	142	0.082	0.699 2	0.996 8
W_F/ g	区组间 between blocks	2	27.450	0.142 6	0.867 1
	家系间 between families	71	1 029.000	5.344 1	<0.001
	区组×家系 block×family	142	153.990	0.799 8	0.957 7
W_D/ g	区组间 between blocks	2	8.133	0.231 2	0.793 6
	家系间 between families	71	216.431	6.153 5	<0.001
	区组×家系 block×family	142	27.332	0.777 1	0.974 0
N_S/ 片	区组间 between blocks	2	0.114	0.127 7	0.880 1
	家系间 between families	71	7.845	8.760 9	<0.001
	区组×家系 block×family	142	0.726	0.810 7	0.947 4
N_P/ 片	区组间 between blocks	2	0.646	0.384 1	0.681 1
	家系间 between families	71	8.196	4.870 6	<0.001
	区组×家系 block×family	142	1.334	0.792 5	0.963 6

家系 family	评分 score	排名 ranking	家系 family	评分 score	排名 ranking	家系 family	评分 score	排名 ranking
余庆16 Yuqing 16	204.040	1	花溪9 Huaxi 9	173.950	9	织金5 Zhijin 5	168.365	17
花溪18 Huaxi 18	194.360	2	湄潭7 Meitan 7	172.117	10	望谟9 Wabgmo 9	167.500	18
纳雍2 Nayong 2	185.329	3	水城1 Shuicheng 1	171.852	11	纳雍15 Nayong 15	166.882	19
普定6 Puding 6	181.061	4	贵定11 Guiding 11	170.080	12	道真7 Daozhen 7	162.711	20
罗甸17 Luodian 17	179.364	5	福泉9 Fuquan 9	169.548	13	贵定9 Guiding 9	161.381	21
纳雍14 Nayong 14	178.329	6	瓮安6 Wengan 6	169.542	14	正安17 Zhengan 17	160.995	22
道真4 Daozhen 4	178.197	7	罗甸13 Luodian 13	168.947	15	瓮安11Wengan 11	160.325	23
纳雍16 Nayong 16	174.420	8	花溪5 Huaxi 5	168.685	16	纳雍1 Nayong 1	159.687	24

家系 family	D			W_D			N_P
家系 family	D_mean/cm	ΔG_g /%	ΔG_r/%	W_D,mean/g	ΔG_g/%	ΔG_r/%	N_P,mean/片	ΔG_g /%	ΔG_r /%
余庆16 Yuqing 16	1.716	20.21	22.39	19.041	44.56	50.81	4.10	41.29	49.09
花溪18 Huaxi 18	1.799	25.53	28.28	17.366	32.93	37.54	3.47	22.02	26.18
纳雍2 Nayong 2	1.598	12.62	13.98	16.013	23.53	26.83	3.83	33.03	39.27
普定6 Pudin 6	1.494	5.93	6.57	19.011	44.35	50.57	3.27	15.90	18.91
罗甸17 Luodian 17	1.747	22.23	24.63	15.760	21.77	24.82	2.93	5.61	6.67
纳雍14 Nayong 14	1.668	17.15	19.00	14.844	15.41	17.57	3.33	17.84	21.21
道真4 Daozhen 4	1.561	10.26	11.37	15.950	23.09	26.32	3.47	21.92	26.06
入选均值 the selected mean	1.655	16.28	18.03	16.855	29.38	33.50	3.49	22.51	26.77
群体均值population mean	1.402			12.246			2.75

A half-sib progeny test and juvenile selection of Trachycarpus fortunei

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