Seedling Stage Determination and Selection of Leuce Hybrid Progeny

doi:10.11923/j.issn.2095-4050.cjas2024-0013

Abstract

Abstract:

In order to screen out the superior individual in the hybrid seedlings of poplars, and then select the excellent clones, we analyzed the genetic variation of the two-year-old seedlings of poplars using the cutting cross technology. The results showed that the growth, branch and leaf traits of different crossing combinations and different individuals of the same crossing combination had considerable genetic variation. Their family heritabilities were all above 0.81, which belonged to high heritability, indicating that the variation among cross-combinations was controlled by genetic factor. The results of multiple comparison showed that (P. alba× P. glandulosa) × P. bolleana × (P. tomentosa × P. bolleana) × P. canescens, (P. alba× P. gnaludotas ‘1’) × (P. tomentosa× P. bolleana) × P. canescens, (P. alba× P. glandulosa) × P. bolleana × (P. tomentosa× P. bolleana) × P. canescens had fast growth. Among the three cross combinations, (P. alba× P. glandulosa)× P. bolleana, P. alba× P. gnaludotas ‘1’, (P. alba× P. glandulosa)× P. bolleana were used as female parents and (P. tomentosa× P. bolleana)× P. canescens was used as male parent, the four parents were regarded as excellent germplasm resources. 20 seedlings were selected as superior individual plants, the average enrolment rate was 4.22%. 3-104×MY and YX1×MY were selected as superior cross combinations, which laid a foundation for the selection of excellent clones.

Key words: Leuce, hybridization, hybrid offspring, genetic variation, selection, asexuline selection, superior individua

SUN Chao, CAO Banghua. Seedling Stage Determination and Selection of Leuce Hybrid Progeny[J]. Journal of Agriculture, 2025, 15(4): 35-41.

Figures/Tables 11

References 24

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杂交亲本	杂交亲本拉丁名	性别	采集地点	简称
银腺杨1号	P. alba× P. gnaludotas ‘1’	♀	山东冠县	YX1
银腺杨2号	P. alba× P. gnaludotas ‘2’	♀	山东冠县	YX2
25-1	(P. alba× P. glandulosa)× P. bolleana	♀	山东冠县	25-1
4-33	(P. alba× P. glandulosa)× P. tomentosa	♀	山东冠县	4-33
3-104	(P. alba× P. glandulosa)× P. bolleana	♀	山东冠县	3-104
毛新×银灰	(P. tomentosa×P. bolleana)× P. canescens	♂	内蒙古通辽	MY
84K	P. abla× P. glandulosa	♂	陕西杨凌	84K

杂交亲本	杂交亲本拉丁名	性别	采集地点	简称
银腺杨1号	P. alba× P. gnaludotas ‘1’	♀	山东冠县	YX1
银腺杨2号	P. alba× P. gnaludotas ‘2’	♀	山东冠县	YX2
25-1	(P. alba× P. glandulosa)× P. bolleana	♀	山东冠县	25-1
4-33	(P. alba× P. glandulosa)× P. tomentosa	♀	山东冠县	4-33
3-104	(P. alba× P. glandulosa)× P. bolleana	♀	山东冠县	3-104
毛新×银灰	(P. tomentosa×P. bolleana)× P. canescens	♂	内蒙古通辽	MY
84K	P. abla× P. glandulosa	♂	陕西杨凌	84K

杂交组合	苗高			地径			分枝数
杂交组合	平均值/m	变幅/m	变异系数/%	平均值/cm	变幅/cm	变异系数/%	平均值/个	变幅/个	变异系数/%
4-33×84K	1.53±0.58	0.37~3.34	37.91	1.78±0.83	0.44~3.92	46.63	4.14±3.88	0.00~16.00	93.72
25-1×MY	1.95±0.50	1.27~3.38	25.64	2.60±0.75	1.07~4.13	28.85	18.08±8.20	2.00~37.00	45.35
YX2×84K	1.55±0.68	0.41~3.18	43.87	2.19±0.91	0.93~4.13	41.55	12.33±9.82	2.00~42.00	79.64
YX2×MY	1.82±0.51	0.60~2.87	28.02	2.50±0.84	0.78~5.38	33.6	16.70±8.45	6.00~48.00	50.6
YX1×MY	2.08±0.63	0.70~3.53	30.29	2.90±1.05	1.14~6.20	36.21	20.03±11.88	2.00~51.00	59.31
3-104×MY	2.22±0.56	1.48~3.75	25.23	2.49±1.01	1.32~7.48	40.56	22.93±11.00	7.00~51.00	47.97
杂交组合	分枝粗			叶长			叶宽
杂交组合	平均值/cm	变幅/cm	变异系数/%	平均值/cm	变幅/cm	变异系数/%	平均值/cm	变幅/cm	变异系数/%
4-33×84K	0.59±0.35	0.00~1.45	59.32	12.29±3.66	5.20~23.10	26.95	11.43±3.08	2.10~9.20	29.45
25-1×MY	0.78±0.29	0.33~1.73	37.18	11.90±2.05	8.50~16.20	17.31	11.09±1.92	2.20~7.60	17.23
YX2×84K	0.99±0.40	0.38~2.18	40.4	9.94±2.33	5.20~14.20	27.79	9.14±2.54	1.60~10.90	23.44
YX2×MY	0.89±0.35	0.36~1.68	39.33	11.13±2.30	4.10~16.20	23.95	9.56±2.29	1.10~6.10	20.66
YX1×MY	0.94±0.36	0.28~2.18	38.3	12.46±2.68	6.80~18.20	24.56	10.83±2.66	2.20~7.50	21.47
3-104×MY	0.95±0.38	0.37~1.98	40	12.20±2.32	8.00~17.90	23.9	10.88±2.60	2.70~9.60	18.47

杂交组合	苗高			地径			分枝数
杂交组合	平均值/m	变幅/m	变异系数/%	平均值/cm	变幅/cm	变异系数/%	平均值/个	变幅/个	变异系数/%
4-33×84K	1.53±0.58	0.37~3.34	37.91	1.78±0.83	0.44~3.92	46.63	4.14±3.88	0.00~16.00	93.72
25-1×MY	1.95±0.50	1.27~3.38	25.64	2.60±0.75	1.07~4.13	28.85	18.08±8.20	2.00~37.00	45.35
YX2×84K	1.55±0.68	0.41~3.18	43.87	2.19±0.91	0.93~4.13	41.55	12.33±9.82	2.00~42.00	79.64
YX2×MY	1.82±0.51	0.60~2.87	28.02	2.50±0.84	0.78~5.38	33.6	16.70±8.45	6.00~48.00	50.6
YX1×MY	2.08±0.63	0.70~3.53	30.29	2.90±1.05	1.14~6.20	36.21	20.03±11.88	2.00~51.00	59.31
3-104×MY	2.22±0.56	1.48~3.75	25.23	2.49±1.01	1.32~7.48	40.56	22.93±11.00	7.00~51.00	47.97
杂交组合	分枝粗			叶长			叶宽
杂交组合	平均值/cm	变幅/cm	变异系数/%	平均值/cm	变幅/cm	变异系数/%	平均值/cm	变幅/cm	变异系数/%
4-33×84K	0.59±0.35	0.00~1.45	59.32	12.29±3.66	5.20~23.10	26.95	11.43±3.08	2.10~9.20	29.45
25-1×MY	0.78±0.29	0.33~1.73	37.18	11.90±2.05	8.50~16.20	17.31	11.09±1.92	2.20~7.60	17.23
YX2×84K	0.99±0.40	0.38~2.18	40.4	9.94±2.33	5.20~14.20	27.79	9.14±2.54	1.60~10.90	23.44
YX2×MY	0.89±0.35	0.36~1.68	39.33	11.13±2.30	4.10~16.20	23.95	9.56±2.29	1.10~6.10	20.66
YX1×MY	0.94±0.36	0.28~2.18	38.3	12.46±2.68	6.80~18.20	24.56	10.83±2.66	2.20~7.50	21.47
3-104×MY	0.95±0.38	0.37~1.98	40	12.20±2.32	8.00~17.90	23.9	10.88±2.60	2.70~9.60	18.47

项目	苗高/m	地径/cm	分枝数/个	分支粗/cm	叶长/cm	叶宽/cm
均值	1.86	2.41	15.70	0.86	11.65	10.49
标准差	0.63	0.96	10.99	0.38	2.65	2.65
最小值	1.53	1.78	4.14	0.59	9.94	9.94
最大值	2.22	2.90	22.93	0.99	12.46	11.43
变异系数/%	33.82	39.93	70.01	44.13	25.25	23.35